Make sick emoji confetti a fullscreen downward spew with morph.

🤢 now fills the viewport, morphs to 🤮 while particles spawn, hides the jumbo stand-in cleanly, and keeps green droplets out of the face morph.

.gitea/workflows/trigger-mobile.yml

@@ -0,0 +1,53 @@
+name: Trigger cinny-mobile
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    if: ${{ !contains(github.event.head_commit.message || '', '[skip mobile]') }}
+    steps:
+      - name: Dispatch update-submodule on cinny-mobile
+        env:
+          # Prefer a PAT with write:repository on cinny-mobile (secret: ACTIONS_TOKEN).
+          # Default GITHUB_TOKEN is usually scoped to this repo only.
+          ACTIONS_TOKEN: ${{ secrets.ACTIONS_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          API_BASE: ${{ github.server_url }}/api/v1
+          CINNY_SHA: ${{ github.sha }}
+        run: |
+          set -euo pipefail
+
+          TOKEN="${ACTIONS_TOKEN:-${GITHUB_TOKEN:-}}"
+          if [ -z "${TOKEN}" ]; then
+            echo "No ACTIONS_TOKEN/GITHUB_TOKEN available to dispatch cinny-mobile"
+            exit 1
+          fi
+
+          BODY=$(jq -n \
+            --arg ref "master" \
+            --arg sha "${CINNY_SHA}" \
+            '{ref: $ref, inputs: {cinny_sha: $sha}}')
+
+          echo "Dispatching litruv/cinny-mobile update-submodule.yml for ${CINNY_SHA}"
+          HTTP_CODE=$(curl -sS -o /tmp/dispatch-body.txt -w "%{http_code}" \
+            -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "${BODY}" \
+            "${API_BASE}/repos/litruv/cinny-mobile/actions/workflows/update-submodule.yml/dispatches?return_run_details=true")
+
+          echo "HTTP ${HTTP_CODE}"
+          cat /tmp/dispatch-body.txt || true
+          echo
+
+          case "${HTTP_CODE}" in
+            200|201|204) echo "Dispatch accepted" ;;
+            *)
+              echo "Dispatch failed"
+              exit 1
+              ;;
+          esac

.gitignore

@@ -4,4 +4,5 @@ node_modules
 devAssets
 
 .DS_Store
-.idea
+.idea
+.cache

docs/API-QUICKSTART.md

@@ -55,6 +55,13 @@ curl -X POST http://127.0.0.1:33384/message/current \
 | `/channels` | GET | Get list of rooms |
 | `/channel` | POST | Switch to a room |
 | `/message/current` | POST | Send message to current room |
+| `/room/current` | GET | Get current room info |
+| `/messages/groups` | GET | Last N messages across groups (`?limit=10`) |
+| `/messages/dms` | GET | Last N messages across DMs (`?limit=10`) |
+| `/messages/combined` | GET | Last N messages across groups + DMs (`?limit=10`) |
+| `/unreads/groups` | GET | Unread group conversations |
+| `/unreads/dms` | GET | Unread DM conversations |
+| `/unreads/combined` | GET | Unread groups + DMs |
 
 ## 🎮 Stream Deck Integration
 

docs/API.md

@@ -280,6 +280,123 @@ Get information about the currently active room.
 
 ---
 
+### Get Recent Messages (Groups)
+
+Get the most recent messages across joined group channels (non-DMs).
+
+**Endpoint**: `GET /messages/groups`
+
+**Query Parameters**:
+- `limit` (optional) — number of messages to return (1–100, default `10`)
+
+**Response**:
+```json
+{
+  "success": true,
+  "data": {
+    "scope": "groups",
+    "limit": 10,
+    "count": 2,
+    "messages": [
+      {
+        "eventId": "$event1",
+        "roomId": "!abc123:matrix.org",
+        "roomName": "General",
+        "isDirect": false,
+        "sender": "@alice:matrix.org",
+        "senderName": "Alice",
+        "timestamp": 1710000000000,
+        "msgtype": "m.text",
+        "body": "Hello!"
+      }
+    ]
+  }
+}
+```
+
+---
+
+### Get Recent Messages (DMs)
+
+Get the most recent messages across joined direct messages.
+
+**Endpoint**: `GET /messages/dms`
+
+**Query Parameters**:
+- `limit` (optional) — number of messages to return (1–100, default `10`)
+
+**Response**: same shape as groups, with `"scope": "dms"`.
+
+---
+
+### Get Recent Messages (Combined)
+
+Get the most recent messages across groups and DMs together.
+
+**Endpoint**: `GET /messages/combined`
+
+**Query Parameters**:
+- `limit` (optional) — number of messages to return (1–100, default `10`)
+
+**Response**: same shape as groups, with `"scope": "combined"`.
+
+---
+
+### Get Unread Conversations (Groups)
+
+List joined group channels that currently have unread activity.
+
+**Endpoint**: `GET /unreads/groups`
+
+**Response**:
+```json
+{
+  "success": true,
+  "data": {
+    "scope": "groups",
+    "count": 1,
+    "unreads": [
+      {
+        "roomId": "!abc123:matrix.org",
+        "name": "General",
+        "isDirect": false,
+        "avatar": "mxc://matrix.org/abc123",
+        "total": 3,
+        "highlight": 1,
+        "latest": {
+          "eventId": "$event1",
+          "sender": "@alice:matrix.org",
+          "senderName": "Alice",
+          "timestamp": 1710000000000,
+          "msgtype": "m.text",
+          "body": "Hello!"
+        }
+      }
+    ]
+  }
+}
+```
+
+Muted rooms are excluded. Sorted by latest activity, then highlight/total counts.
+
+---
+
+### Get Unread Conversations (DMs)
+
+**Endpoint**: `GET /unreads/dms`
+
+**Response**: same shape as groups, with `"scope": "dms"`.
+
+---
+
+### Get Unread Conversations (Combined)
+
+**Endpoint**: `GET /unreads/combined`
+
+**Response**: same shape as groups, with `"scope": "combined"`.
+
+---
+
 ## Error Responses
 
 All endpoints return error responses in the following format:

docs/README.md

@@ -62,6 +62,7 @@ New feature? Copy [`handoff/TEMPLATE.md`](./handoff/TEMPLATE.md) into `handoff/f
 | Sub-rooms | [sub-rooms](./handoff/features/sub-rooms/HANDOFF.md) |
 | Lobby (space card view) | [lobby-forums](./handoff/features/lobby-forums/HANDOFF.md) |
 | Forum spaces (post feed UI) | [forum](./handoff/features/forum/HANDOFF.md) |
+| Room App UI (bot-driven) | [room-app-ui](./handoff/features/room-app-ui/HANDOFF.md) |
 
 ### Settings & customization
 

docs/handoff/features/local-api/HANDOFF.md

@@ -50,6 +50,12 @@ No persistent storage. Actions read/write ephemeral app state (current room, cal
 | `send-message` | `{ roomId, message }` | send result |
 | `send-message-current` | `{ message }` | send to active room |
 | `get-current-room` | — | current room id |
+| `get-messages-groups` | `{ limit? }` | recent messages across group channels |
+| `get-messages-dms` | `{ limit? }` | recent messages across DMs |
+| `get-messages-combined` | `{ limit? }` | recent messages across groups + DMs |
+| `get-unreads-groups` | — | unread group conversations |
+| `get-unreads-dms` | — | unread DM conversations |
+| `get-unreads-combined` | — | unread groups + DMs |
 
 ## Dependencies
 

docs/handoff/features/room-app-ui/HANDOFF.md

@@ -0,0 +1,93 @@
+# Room App UI — handoff
+
+## Summary
+
+Bots can publish a declarative UI into Matrix room state (`im.paarrot.ui`). Paarrot takes over the room view with that UI. User interactions are sent as timeline events (`im.paarrot.ui.action`), not chat messages. The bot updates state to re-render panels.
+
+## User-facing behavior
+
+- When a room has a valid `im.paarrot.ui` state event, opening the room shows the app UI instead of the chat timeline (forum rooms still win over app UI).
+- **Show chat** returns to the normal timeline without clearing bot state; a banner offers **Show app** to go back.
+- Action events are hidden from the chat timeline (same as confetti relay events).
+- Room settings → Permissions includes **Set Room App UI** and **Send Room App Actions**.
+
+## Architecture
+
+```
+Bot → state im.paarrot.ui
+  → Room.tsx detects via useStateEvent
+    → RoomAppView → RoomAppSchema (declarative nodes)
+      → user clicks → mx.sendEvent(im.paarrot.ui.action)
+        → Bot updates im.paarrot.ui → live re-render
+```
+
+## Key files
+
+| Path | Role |
+|------|------|
+| `cinny/src/types/matrix/room.ts` | `StateEvent.PaarrotUi`, `MessageEvent.PaarrotUiAction`, node types |
+| `cinny/src/app/utils/room.ts` | `getPaarrotUiContent`, `hasRoomAppUi` |
+| `cinny/src/app/features/room/Room.tsx` | Takeover branch + Show chat / Show app |
+| `cinny/src/app/features/room-app/` | `RoomAppView`, schema renderer, CSS sanitize/scope |
+| `cinny/src/app/features/room/RoomTimeline.tsx` | Hides `im.paarrot.ui.action` |
+| `cinny/src/app/features/room-settings/permissions/usePermissionItems.ts` | Permission labels |
+
+## Data model
+
+| Event | Kind | Content |
+|-------|------|---------|
+| `im.paarrot.ui` | state (`""`) | `{ version, title?, css?, root }` |
+| `im.paarrot.ui.action` | timeline | `{ action, component_id, value?, values?, ui_event_id? }` |
+
+See [samples/](./samples/) for pasteable Developer Tools payloads.
+
+MVP node types: `panel`, `row`, `text`, `button`, `input`, `select`, `image`, `spacer`.
+
+## Dependencies
+
+- folds UI primitives
+- matrix-js-sdk `sendEvent` / state sync
+- No bot-supplied JavaScript; CSS is sanitized and scoped under `[data-room-app]`
+
+## Integration points
+
+- Same room takeover pattern as forums (`Room.tsx` branch)
+- Developer Tools can send state/events for demos without a bot process
+
+## Testing
+
+### Manual
+
+1. In Developer Tools → Send State Event, type `im.paarrot.ui`, paste `samples/trivia-ui-state.json`.
+2. Open the room — app UI should replace the timeline.
+3. Click an answer — an `im.paarrot.ui.action` event is sent (hidden in timeline; visible in raw/dev tools).
+4. Click **Show chat**, then **Show app**.
+5. Clear state content / redact state to restore normal chat.
+
+### Automated
+
+- None yet
+
+## Known issues & gotchas
+
+- CSS scoping is best-effort, not a full CSS parser
+- Images allow `mxc://`, `https://`, and `http://` only
+- Forum rooms take priority over app UI
+- `sendEvent(..., as any)` cast mirrors other custom event types
+
+## Future work
+
+- `form` / `tabs` / `markdown` / `progress` nodes
+- Bot SDK helpers
+- Stronger CSS sandbox (Shadow DOM)
+- Encrypt custom action payloads helpers if needed
+
+## Related docs
+
+- [samples/trivia-ui-state.json](./samples/trivia-ui-state.json)
+- [samples/ui-action-event.json](./samples/ui-action-event.json)
+
+## Add your extra things here
+
+- Power level: bots need PL ≥ `state_default` (usually 50) or an explicit level for `im.paarrot.ui`
+- Action events use normal message event power levels unless overridden for `im.paarrot.ui.action`

docs/handoff/features/room-app-ui/samples/poll-ui-state.json

@@ -0,0 +1,34 @@
+{
+  "version": 1,
+  "title": "Poll Booth",
+  "root": {
+    "type": "panel",
+    "id": "poll",
+    "children": [
+      {
+        "type": "text",
+        "id": "prompt",
+        "text": "Where should we go for lunch?"
+      },
+      {
+        "type": "select",
+        "id": "choice",
+        "name": "choice",
+        "label": "Your vote",
+        "options": [
+          { "label": "Ramen", "value": "ramen" },
+          { "label": "Pizza", "value": "pizza" },
+          { "label": "Salad", "value": "salad" }
+        ],
+        "value": "ramen"
+      },
+      {
+        "type": "button",
+        "id": "vote",
+        "label": "Submit vote",
+        "action": "vote",
+        "variant": "Primary"
+      }
+    ]
+  }
+}

docs/handoff/features/room-app-ui/samples/trivia-ui-state.json

@@ -0,0 +1,88 @@
+{
+  "version": 1,
+  "title": "Trivia Night",
+  "css": ".score { font-weight: 700; } .hint { opacity: 0.75; }",
+  "root": {
+    "type": "panel",
+    "id": "main",
+    "children": [
+      {
+        "type": "text",
+        "id": "q",
+        "text": "Capital of France?"
+      },
+      {
+        "type": "text",
+        "id": "hint",
+        "className": "hint",
+        "text": "Pick one answer below."
+      },
+      {
+        "type": "spacer",
+        "id": "sp1",
+        "size": 16
+      },
+      {
+        "type": "row",
+        "id": "answers",
+        "children": [
+          {
+            "type": "button",
+            "id": "a",
+            "label": "Paris",
+            "action": "answer",
+            "value": "paris",
+            "variant": "Primary"
+          },
+          {
+            "type": "button",
+            "id": "b",
+            "label": "Lyon",
+            "action": "answer",
+            "value": "lyon",
+            "variant": "Secondary"
+          },
+          {
+            "type": "button",
+            "id": "c",
+            "label": "Marseille",
+            "action": "answer",
+            "value": "marseille",
+            "variant": "Secondary"
+          }
+        ]
+      },
+      {
+        "type": "spacer",
+        "id": "sp2",
+        "size": 24
+      },
+      {
+        "type": "text",
+        "id": "score_label",
+        "className": "score",
+        "text": "Score: 0"
+      },
+      {
+        "type": "input",
+        "id": "nick",
+        "name": "nickname",
+        "label": "Display name on the board",
+        "placeholder": "Optional nickname"
+      },
+      {
+        "type": "row",
+        "id": "submit_row",
+        "children": [
+          {
+            "type": "button",
+            "id": "join",
+            "label": "Join board",
+            "action": "join",
+            "variant": "Success"
+          }
+        ]
+      }
+    ]
+  }
+}

docs/handoff/features/room-app-ui/samples/ui-action-event.json

@@ -0,0 +1,9 @@
+{
+  "action": "answer",
+  "component_id": "a",
+  "value": "paris",
+  "values": {
+    "nickname": "Ada"
+  },
+  "ui_event_id": "$REPLACE_WITH_CURRENT_im.paarrot.ui_EVENT_ID"
+}

package-lock.json

@@ -83,6 +83,7 @@
       },
       "devDependencies": {
         "@esbuild-plugins/node-globals-polyfill": "0.2.3",
+        "@monaco-editor/react": "4.7.0",
         "@rollup/plugin-inject": "5.0.5",
         "@rollup/plugin-wasm": "6.2.2",
         "@types/chroma-js": "3.1.2",
@@ -106,6 +107,7 @@
         "eslint-plugin-jsx-a11y": "6.10.2",
         "eslint-plugin-react": "7.37.5",
         "eslint-plugin-react-hooks": "7.1.1",
+        "monaco-editor": "0.52.2",
         "prettier": "3.9.4",
         "typescript": "6.0.3",
         "vite": "8.1.3",
@@ -2563,6 +2565,31 @@
         "node": ">= 18"
       }
     },
+    "node_modules/@monaco-editor/loader": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/@monaco-editor/loader/-/loader-1.7.0.tgz",
+      "integrity": "sha512-gIwR1HrJrrx+vfyOhYmCZ0/JcWqG5kbfG7+d3f/C1LXk2EvzAbHSg3MQ5lO2sMlo9izoAZ04shohfKLVT6crVA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "state-local": "^1.0.6"
+      }
+    },
+    "node_modules/@monaco-editor/react": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/@monaco-editor/react/-/react-4.7.0.tgz",
+      "integrity": "sha512-cyzXQCtO47ydzxpQtCGSQGOC8Gk3ZUeBXFAxD+CWXYFo5OqZyZUonFl0DwUlTyAfRHntBfw2p3w4s9R6oe1eCA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@monaco-editor/loader": "^1.5.0"
+      },
+      "peerDependencies": {
+        "monaco-editor": ">= 0.25.0 < 1",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",
+        "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/@napi-rs/canvas": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/@napi-rs/canvas/-/canvas-1.0.2.tgz",
@@ -8801,6 +8828,13 @@
       "resolved": "https://registry.npmjs.org/modern-ahocorasick/-/modern-ahocorasick-1.1.0.tgz",
       "integrity": "sha512-sEKPVl2rM+MNVkGQt3ChdmD8YsigmXdn5NifZn6jiwn9LRJpWm8F3guhaqrJT/JOat6pwpbXEk6kv+b9DMIjsQ=="
     },
+    "node_modules/monaco-editor": {
+      "version": "0.52.2",
+      "resolved": "https://registry.npmjs.org/monaco-editor/-/monaco-editor-0.52.2.tgz",
+      "integrity": "sha512-GEQWEZmfkOGLdd3XK8ryrfWz3AIP8YymVXiPHEdewrUq7mh0qrKrfHLNCXcbB6sTnMLnOZ3ztSiKcciFUkIJwQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -10157,6 +10191,13 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/state-local": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/state-local/-/state-local-1.0.7.tgz",
+      "integrity": "sha512-HTEHMNieakEnoe33shBYcZ7NX83ACUjCu8c40iOGEZsngj9zRnkqS9j1pqQPXwobB0ZcVTk27REb7COQ0UR59w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/stop-iteration-iterator": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/stop-iteration-iterator/-/stop-iteration-iterator-1.1.0.tgz",

package.json

@@ -14,7 +14,8 @@
     "check:eslint": "eslint src/*",
     "check:prettier": "prettier --check .",
     "fix:prettier": "prettier --write .",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "playground": "vite"
   },
   "keywords": [],
   "author": "Ajay Bura",
@@ -94,6 +95,7 @@
   },
   "devDependencies": {
     "@esbuild-plugins/node-globals-polyfill": "0.2.3",
+    "@monaco-editor/react": "4.7.0",
     "@rollup/plugin-inject": "5.0.5",
     "@rollup/plugin-wasm": "6.2.2",
     "@types/chroma-js": "3.1.2",
@@ -117,6 +119,7 @@
     "eslint-plugin-jsx-a11y": "6.10.2",
     "eslint-plugin-react": "7.37.5",
     "eslint-plugin-react-hooks": "7.1.1",
+    "monaco-editor": "0.52.2",
     "prettier": "3.9.4",
     "typescript": "6.0.3",
     "vite": "8.1.3",

playground-liveTsxPlugin.ts

@@ -0,0 +1,149 @@
+import path from 'node:path';
+import fs from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import type { Plugin, ViteDevServer } from 'vite';
+
+export type LiveTsxApi = {
+  getSource: () => string;
+  setSource: (source: string) => void;
+};
+
+const ALLOWED_PREFIXES = ['src/app/components/', 'src/app/features/'];
+
+function resolveAppSourceFile(projectRoot: string, relPath: string): string | null {
+  const normalized = relPath.replace(/\\/g, '/').replace(/^\/+/, '');
+  if (normalized.includes('..') || path.isAbsolute(normalized)) return null;
+  if (!ALLOWED_PREFIXES.some((p) => normalized.startsWith(p))) return null;
+  if (!/\.(tsx|ts)$/.test(normalized)) return null;
+  const abs = path.resolve(projectRoot, normalized);
+  const root = path.resolve(projectRoot);
+  if (!abs.startsWith(root + path.sep) && abs !== root) return null;
+  return abs;
+}
+
+function readBody(req: NodeJS.ReadableStream): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const chunks: Buffer[] = [];
+    req.on('data', (c) => chunks.push(c));
+    req.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')));
+    req.on('error', reject);
+  });
+}
+
+function bumpLivePreview(server: ViteDevServer | undefined) {
+  if (!server) return;
+  server.ws.send({
+    type: 'custom',
+    event: 'playground:live-updated',
+    data: { revision: Date.now() },
+  });
+}
+
+export function liveTsxPlugin(projectRoot: string, initialSource: string): Plugin {
+  const liveFile = path.resolve(projectRoot, '.cache/playground-live.tsx');
+
+  fs.mkdirSync(path.dirname(liveFile), { recursive: true });
+  fs.writeFileSync(liveFile, initialSource, 'utf8');
+
+  let source = initialSource;
+  let server: ViteDevServer | undefined;
+
+  const api: LiveTsxApi = {
+    getSource: () => source,
+    setSource: (next) => {
+      source = next;
+      fs.writeFileSync(liveFile, next, 'utf8');
+      if (!server) return;
+      for (const m of server.moduleGraph.urlToModuleMap.values()) {
+        if (m.file === liveFile) server.moduleGraph.invalidateModule(m);
+      }
+      const byId = server.moduleGraph.getModuleById(liveFile);
+      if (byId) server.moduleGraph.invalidateModule(byId);
+      bumpLivePreview(server);
+    },
+  };
+
+  return {
+    name: 'playground-live-tsx',
+    configureServer(devServer) {
+      server = devServer;
+      (devServer as ViteDevServer & { playgroundLive?: LiveTsxApi }).playgroundLive = api;
+
+      devServer.middlewares.use('/__playground/live', (req, res, next) => {
+        if (req.method === 'GET') {
+          res.setHeader('Content-Type', 'text/plain; charset=utf-8');
+          res.end(source);
+          return;
+        }
+        if (req.method === 'POST') {
+          void readBody(req).then((body) => {
+            api.setSource(body);
+            res.statusCode = 204;
+            res.end();
+          });
+          return;
+        }
+        next();
+      });
+
+      // Read/write real Cinny component sources (strings, markup, etc.).
+      devServer.middlewares.use('/__playground/source', (req, res, next) => {
+        const url = new URL(req.url ?? '', 'http://playground.local');
+        const rel = url.searchParams.get('path') ?? '';
+        const abs = resolveAppSourceFile(projectRoot, rel);
+        if (!abs) {
+          res.statusCode = 400;
+          res.end('Invalid or disallowed path');
+          return;
+        }
+
+        if (req.method === 'GET') {
+          if (!fs.existsSync(abs)) {
+            res.statusCode = 404;
+            res.end('Not found');
+            return;
+          }
+          res.setHeader('Content-Type', 'text/plain; charset=utf-8');
+          res.end(fs.readFileSync(abs, 'utf8'));
+          return;
+        }
+
+        if (req.method === 'POST') {
+          void readBody(req).then((body) => {
+            fs.mkdirSync(path.dirname(abs), { recursive: true });
+            fs.writeFileSync(abs, body, 'utf8');
+            const mod =
+              server?.moduleGraph.getModuleById(abs) ??
+              [...(server?.moduleGraph.urlToModuleMap.values() ?? [])].find((m) => m.file === abs);
+            if (mod && server) server.moduleGraph.invalidateModule(mod);
+            bumpLivePreview(server);
+            res.statusCode = 204;
+            res.end();
+          });
+          return;
+        }
+
+        next();
+      });
+    },
+    resolveId(id) {
+      const clean = id.split('?')[0];
+      if (
+        clean === '/@playground/live.tsx' ||
+        clean === 'virtual:playground-live' ||
+        clean.endsWith('/.cache/playground-live.tsx')
+      ) {
+        return liveFile;
+      }
+      return undefined;
+    },
+  };
+}
+
+export function readDefaultLiveSource(projectRoot: string): string {
+  return fs.readFileSync(path.join(projectRoot, 'src/playground/defaultLive.tsx'), 'utf8');
+}
+
+export function projectRootDir(): string {
+  return path.dirname(fileURLToPath(import.meta.url));
+}

playground.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Component Playground</title>
+  </head>
+  <body style="margin:0;background:#0f1115;color:#e8eaed">
+    <div id="root"></div>
+    <script type="module" src="./src/playground/main.tsx?v=react-dedupe-1"></script>
+  </body>
+</html>

src/app/components/AccountDataEditor.tsx

@@ -1,5 +1,5 @@
 import React, { FormEventHandler, useCallback, useEffect, useMemo, useRef, useState } from 'react';
-import { Box, Text, IconButton, Input, Button, TextAreaComponent as TextArea, color, Spinner, Chip, Scroll, config } from 'folds';
+import { Box, Text, IconButton, Input, Button, TextArea, color, Spinner, Chip, Scroll, config } from 'folds';
 import { Icon, Icons } from './icons';
 import { MatrixError } from 'matrix-js-sdk';
 import { Cursor } from '../plugins/text-area';
@@ -154,7 +154,7 @@ function AccountDataEdit({
         <Box shrink="No">
           <Text size="L400">JSON Content</Text>
         </Box>
-        <TextAreaComponent
+        <TextArea
           ref={textAreaRef}
           name="contentTextArea"
           style={{

src/app/components/RenderMessageContent.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { KeyboardEvent, MouseEvent } from 'react';
 import { MsgType } from 'matrix-js-sdk';
 import { HTMLReactParserOptions } from 'html-react-parser';
 import { Opts } from 'linkifyjs';
@@ -49,6 +49,12 @@ type RenderMessageContentProps = {
   linkifyOpts: Opts;
   outlineAttachment?: boolean;
   disabledEmbedPatterns?: string[];
+  targetEventId?: string;
+  onJumboEmojiClick?: (
+    targetEventId: string,
+    body: string,
+    event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>
+  ) => void;
 };
 export function RenderMessageContent({
   displayName,
@@ -63,6 +69,8 @@ export function RenderMessageContent({
   linkifyOpts,
   outlineAttachment,
   disabledEmbedPatterns,
+  targetEventId,
+  onJumboEmojiClick,
 }: RenderMessageContentProps) {
   const renderUrlsPreview = (urls: string[]) => {
     let filteredUrls = urls.filter((url) => !testMatrixTo(url));
@@ -100,6 +108,11 @@ export function RenderMessageContent({
       </>
     );
   };
+  const handleJumboEmojiClick =
+    targetEventId && onJumboEmojiClick
+      ? (body: string, event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>) =>
+          onJumboEmojiClick(targetEventId, body, event)
+      : undefined;
   const renderCaption = () => {
     const content: IImageContent = getContent();
     if (content.filename && content.filename !== content.body) {
@@ -182,6 +195,7 @@ export function RenderMessageContent({
       <MText
         edited={edited}
         content={getContent()}
+        onJumboEmojiClick={handleJumboEmojiClick}
         renderBody={(props) => (
           <RenderBody
             {...props}
@@ -201,6 +215,7 @@ export function RenderMessageContent({
         displayName={displayName}
         edited={edited}
         content={getContent()}
+        onJumboEmojiClick={handleJumboEmojiClick}
         renderBody={(props) => (
           <RenderBody
             {...props}
@@ -219,6 +234,7 @@ export function RenderMessageContent({
       <MNotice
         edited={edited}
         content={getContent()}
+        onJumboEmojiClick={handleJumboEmojiClick}
         renderBody={(props) => (
           <RenderBody
             {...props}

src/app/components/image-viewer/ImageViewer.css.ts

@@ -1,42 +1,127 @@
 import { style } from '@vanilla-extract/css';
-import { DefaultReset, color, config } from 'folds';
+import { DefaultReset } from 'folds';
 
-export const ImageViewer = style([
+export const Root = style([
   DefaultReset,
   {
-    height: '100%',
+    position: 'fixed',
+    inset: 0,
+    zIndex: 200,
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    padding: 16,
+    boxSizing: 'border-box',
   },
 ]);
 
-export const ImageViewerHeader = style([
+export const Backdrop = style([
   DefaultReset,
   {
-    paddingLeft: config.space.S200,
-    paddingRight: config.space.S200,
-    borderBottomWidth: config.borderWidth.B300,
-    flexShrink: 0,
-    gap: config.space.S200,
+    position: 'absolute',
+    inset: 0,
+    backgroundColor: 'rgba(0, 0, 0, 0.72)',
+    backdropFilter: 'blur(18px)',
+    WebkitBackdropFilter: 'blur(18px)',
+    cursor: 'zoom-out',
   },
 ]);
 
-export const ImageViewerContent = style([
+export const Stage = style([
   DefaultReset,
   {
-    backgroundColor: color.Background.Container,
-    color: color.Background.OnContainer,
+    position: 'relative',
+    zIndex: 1,
+    display: 'flex',
+    flexDirection: 'column',
+    alignItems: 'stretch',
+    gap: 10,
+    maxWidth: 'min(96vw, 1100px)',
+    maxHeight: 'min(92vh, 900px)',
+    width: '100%',
+    minWidth: 0,
+    pointerEvents: 'none',
+  },
+]);
+
+export const Chrome = style([
+  DefaultReset,
+  {
+    display: 'flex',
+    alignItems: 'center',
+    gap: 8,
+    width: '100%',
+    minWidth: 0,
+    color: '#fff',
+    pointerEvents: 'auto',
+  },
+]);
+
+export const Title = style([
+  DefaultReset,
+  {
+    flex: 1,
+    minWidth: 0,
+    fontSize: 13,
+    fontWeight: 600,
+    lineHeight: '18px',
+    color: 'rgba(255, 255, 255, 0.9)',
     overflow: 'hidden',
+    textOverflow: 'ellipsis',
+    whiteSpace: 'nowrap',
   },
 ]);
 
-export const ImageViewerImg = style([
+export const ChromeButton = style([
   DefaultReset,
   {
-    objectFit: 'contain',
-    width: 'auto',
-    height: 'auto',
-    maxWidth: '100%',
-    maxHeight: '100%',
-    backgroundColor: color.Surface.Container,
-    transition: 'transform 100ms linear',
+    display: 'inline-flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    flexShrink: 0,
+    padding: 6,
+    border: 'none',
+    borderRadius: 4,
+    background: 'rgba(0, 0, 0, 0.4)',
+    color: '#fff',
+    cursor: 'pointer',
+  },
+]);
+
+export const Frame = style([
+  DefaultReset,
+  {
+    position: 'relative',
+    alignSelf: 'center',
+    maxWidth: 'min(96vw, 1100px)',
+    maxHeight: 'min(80vh, 820px)',
+    overflow: 'hidden',
+    cursor: 'zoom-in',
+    touchAction: 'none',
+    pointerEvents: 'auto',
+    selectors: {
+      '&[data-zoomed]': {
+        cursor: 'zoom-out',
+        overflow: 'visible',
+      },
+      '&[data-pannable]': {
+        cursor: 'grab',
+      },
+      '&[data-dragging]': {
+        cursor: 'grabbing',
+      },
+    },
+  },
+]);
+
+export const Image = style([
+  DefaultReset,
+  {
+    display: 'block',
+    borderRadius: 8,
+    background: 'transparent',
+    transform: 'translate(var(--img-tx, 0px), var(--img-ty, 0px)) scale(var(--img-zoom, 1))',
+    transformOrigin: '0 0',
+    userSelect: 'none',
   },
 ]);

src/app/components/image-viewer/ImageViewer.tsx

@@ -1,16 +1,62 @@
 /* eslint-disable jsx-a11y/no-noninteractive-element-interactions */
-import React from 'react';
+import React, {
+  useCallback,
+  useEffect,
+  useLayoutEffect,
+  useRef,
+  useState,
+} from 'react';
 import FileSaver from 'file-saver';
 import classNames from 'classnames';
-import { Box, Chip, Header, IconButton, Text, as } from 'folds';
+import { as } from 'folds';
 import { Icon, Icons } from '../icons';
 import * as css from './ImageViewer.css';
-import { useZoom } from '../../hooks/useZoom';
-import { usePan } from '../../hooks/usePan';
 import { downloadMedia } from '../../utils/matrix';
-import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { getCurrentAccessToken } from '../../utils/auth';
 
+const ZOOM_MIN = 1;
+const ZOOM_MAX = 5;
+const ZOOM_CLICK = 2.5;
+const DRAG_CLICK_SLOP = 6;
+
+type ZoomState = {
+  scale: number;
+  tx: number;
+  ty: number;
+};
+
+type PinchSession = {
+  startDist: number;
+  startScale: number;
+  startTx: number;
+  startTy: number;
+  startMidX: number;
+  startMidY: number;
+};
+
+const INITIAL_ZOOM: ZoomState = { scale: 1, tx: 0, ty: 0 };
+
+function imageViewportMax() {
+  return {
+    w: Math.min(window.innerWidth * 0.96, 1100),
+    h: Math.min(window.innerHeight * 0.8, 820),
+  };
+}
+
+function pointerDistance(
+  a: { x: number; y: number },
+  b: { x: number; y: number }
+): number {
+  return Math.hypot(a.x - b.x, a.y - b.y);
+}
+
+function pointerMidpoint(
+  a: { x: number; y: number },
+  b: { x: number; y: number }
+): { x: number; y: number } {
+  return { x: (a.x + b.x) / 2, y: (a.y + b.y) / 2 };
+}
+
 export type ImageViewerProps = {
   alt: string;
   src: string;
@@ -19,18 +65,215 @@ export type ImageViewerProps = {
 
 export const ImageViewer = as<'div', ImageViewerProps>(
   ({ className, alt, src, requestClose, ...props }, ref) => {
-    const mx = useMatrixClient();
-    const { zoom, zoomIn, zoomOut, setZoom } = useZoom(0.2);
-    const { pan, cursor, onMouseDown } = usePan(zoom !== 1);
+    const frameRef = useRef<HTMLDivElement>(null);
+    const imgRef = useRef<HTMLImageElement>(null);
+    const zoomRef = useRef<ZoomState>({ ...INITIAL_ZOOM });
+    const pointersRef = useRef<Map<number, { x: number; y: number }>>(new Map());
+    const dragRef = useRef<{
+      id: number;
+      x: number;
+      y: number;
+      tx: number;
+      ty: number;
+      moved: boolean;
+    } | null>(null);
+    const pinchRef = useRef<PinchSession | null>(null);
+    /** Skip the next click after a pinch so we don't toggle zoom. */
+    const suppressClickRef = useRef(false);
+    const baseSizeRef = useRef({ w: 0, h: 0 });
+
+    const [zoom, setZoom] = useState<ZoomState>(INITIAL_ZOOM);
+    const [dragging, setDragging] = useState(false);
+
+    const applyZoomCss = useCallback((next: ZoomState) => {
+      const img = imgRef.current;
+      if (!img) return;
+      img.style.setProperty('--img-zoom', String(next.scale));
+      img.style.setProperty('--img-tx', `${next.tx}px`);
+      img.style.setProperty('--img-ty', `${next.ty}px`);
+    }, []);
+
+    const clampPan = useCallback((state: ZoomState): ZoomState => {
+      const img = imgRef.current;
+      const frame = frameRef.current;
+      if (!img || !frame) return state;
+
+      const baseW = img.offsetWidth || baseSizeRef.current.w;
+      const baseH = img.offsetHeight || baseSizeRef.current.h;
+      const frameW = frame.clientWidth;
+      const frameH = frame.clientHeight;
+      if (!baseW || !baseH || !frameW || !frameH) return state;
+
+      const scaledW = baseW * state.scale;
+      const scaledH = baseH * state.scale;
+      let { tx, ty } = state;
+
+      if (scaledW <= frameW) tx = (frameW - scaledW) / 2;
+      else tx = Math.min(0, Math.max(frameW - scaledW, tx));
+
+      if (scaledH <= frameH) ty = (frameH - scaledH) / 2;
+      else ty = Math.min(0, Math.max(frameH - scaledH, ty));
+
+      return { ...state, tx, ty };
+    }, []);
+
+    const commitZoom = useCallback(
+      (next: ZoomState) => {
+        const clamped = clampPan(next);
+        zoomRef.current = clamped;
+        applyZoomCss(clamped);
+        setZoom(clamped);
+      },
+      [applyZoomCss, clampPan]
+    );
+
+    const resetZoom = useCallback(() => {
+      dragRef.current = null;
+      pinchRef.current = null;
+      setDragging(false);
+      commitZoom({ ...INITIAL_ZOOM });
+    }, [commitZoom]);
+
+    const fitImage = useCallback(() => {
+      const img = imgRef.current;
+      if (!img) return;
+      const iw = img.naturalWidth || 0;
+      const ih = img.naturalHeight || 0;
+      if (iw <= 0 || ih <= 0) return;
+
+      const { w: maxW, h: maxH } = imageViewportMax();
+      const s = Math.min(1, maxW / iw, maxH / ih);
+      const w = Math.max(1, Math.round(iw * s));
+      const h = Math.max(1, Math.round(ih * s));
+      img.style.width = `${w}px`;
+      img.style.height = `${h}px`;
+      baseSizeRef.current = { w, h };
+      commitZoom({ ...INITIAL_ZOOM });
+    }, [commitZoom]);
+
+    const zoomAround = useCallback(
+      (px: number, py: number, newScale: number) => {
+        const z = zoomRef.current;
+        const scale = Math.min(ZOOM_MAX, Math.max(ZOOM_MIN, newScale));
+        const ix = (px - z.tx) / z.scale;
+        const iy = (py - z.ty) / z.scale;
+        commitZoom({
+          scale,
+          tx: px - ix * scale,
+          ty: py - iy * scale,
+        });
+      },
+      [commitZoom]
+    );
+
+    const framePoint = (clientX: number, clientY: number) => {
+      const frame = frameRef.current;
+      if (!frame) return { x: 0, y: 0 };
+      const r = frame.getBoundingClientRect();
+      return { x: clientX - r.left, y: clientY - r.top };
+    };
+
+    const beginPinch = useCallback(() => {
+      const pts = [...pointersRef.current.values()];
+      if (pts.length < 2) return;
+      const [a, b] = pts;
+      const mid = pointerMidpoint(a, b);
+      const local = framePoint(mid.x, mid.y);
+      const z = zoomRef.current;
+      pinchRef.current = {
+        startDist: Math.max(1, pointerDistance(a, b)),
+        startScale: z.scale,
+        startTx: z.tx,
+        startTy: z.ty,
+        startMidX: local.x,
+        startMidY: local.y,
+      };
+      dragRef.current = null;
+      setDragging(true);
+    }, []);
+
+    const updatePinch = useCallback(() => {
+      const pinch = pinchRef.current;
+      const pts = [...pointersRef.current.values()];
+      if (!pinch || pts.length < 2) return;
+
+      const [a, b] = pts;
+      const dist = Math.max(1, pointerDistance(a, b));
+      const mid = pointerMidpoint(a, b);
+      const local = framePoint(mid.x, mid.y);
+      const scale = Math.min(
+        ZOOM_MAX,
+        Math.max(ZOOM_MIN, pinch.startScale * (dist / pinch.startDist))
+      );
+
+      // Keep the original content under the pinch midpoint while scaling + panning.
+      const ix = (pinch.startMidX - pinch.startTx) / pinch.startScale;
+      const iy = (pinch.startMidY - pinch.startTy) / pinch.startScale;
+      commitZoom({
+        scale,
+        tx: local.x - ix * scale,
+        ty: local.y - iy * scale,
+      });
+      suppressClickRef.current = true;
+    }, [commitZoom]);
+
+    useLayoutEffect(() => {
+      resetZoom();
+    }, [src, resetZoom]);
+
+    useEffect(() => {
+      const onKey = (event: KeyboardEvent) => {
+        if (event.key === 'Escape') {
+          event.preventDefault();
+          requestClose();
+        }
+      };
+      document.addEventListener('keydown', onKey);
+      return () => document.removeEventListener('keydown', onKey);
+    }, [requestClose]);
+
+    useEffect(() => {
+      const frame = frameRef.current;
+      if (!frame) return undefined;
+
+      const onWheel = (event: WheelEvent) => {
+        event.preventDefault();
+        const img = imgRef.current;
+        if (!img?.src) return;
+        const factor = Math.exp(-event.deltaY * 0.002);
+        const r = frame.getBoundingClientRect();
+        const x = event.clientX - r.left;
+        const y = event.clientY - r.top;
+        zoomAround(x, y, zoomRef.current.scale * factor);
+      };
+
+      // Block browser gesture zoom / scroll while pinching on the frame.
+      const blockGesture = (event: Event) => {
+        if (pointersRef.current.size >= 2 || pinchRef.current) {
+          event.preventDefault();
+        }
+      };
+
+      frame.addEventListener('wheel', onWheel, { passive: false });
+      frame.addEventListener('touchmove', blockGesture, { passive: false });
+      return () => {
+        frame.removeEventListener('wheel', onWheel);
+        frame.removeEventListener('touchmove', blockGesture);
+      };
+    }, [zoomAround]);
+
+    useEffect(() => {
+      const onResize = () => fitImage();
+      window.addEventListener('resize', onResize);
+      return () => window.removeEventListener('resize', onResize);
+    }, [fitImage]);
 
     const handleDownload = async () => {
       try {
-        // Always use current session's token to avoid stale tokens during account switches
         const fileContent = await downloadMedia(src, getCurrentAccessToken());
         FileSaver.saveAs(fileContent, alt);
       } catch (error) {
         console.warn('[ImageViewer] Failed to download media:', error);
-        // Fallback: try to fetch via standard fetch as blob
         try {
           const response = await fetch(src);
           if (response.ok) {
@@ -38,81 +281,171 @@ export const ImageViewer = as<'div', ImageViewerProps>(
             FileSaver.saveAs(blob, alt);
           }
         } catch {
-          // If all else fails, open in new tab to let browser handle it
           window.open(src, '_blank');
         }
       }
     };
 
+    const handleClick = (event: React.MouseEvent) => {
+      if (suppressClickRef.current) {
+        suppressClickRef.current = false;
+        return;
+      }
+      if (dragRef.current?.moved) {
+        dragRef.current = null;
+        return;
+      }
+      const img = imgRef.current;
+      if (!img?.src) return;
+      event.preventDefault();
+      const { x, y } = framePoint(event.clientX, event.clientY);
+      if (zoomRef.current.scale <= 1.01) {
+        zoomAround(x, y, ZOOM_CLICK);
+      } else {
+        resetZoom();
+      }
+    };
+
+    const handlePointerDown = (event: React.PointerEvent) => {
+      if (event.button !== 0 && event.pointerType === 'mouse') return;
+
+      pointersRef.current.set(event.pointerId, { x: event.clientX, y: event.clientY });
+      frameRef.current?.setPointerCapture(event.pointerId);
+
+      if (pointersRef.current.size >= 2) {
+        beginPinch();
+        return;
+      }
+
+      if (zoomRef.current.scale <= 1.01) return;
+      const z = zoomRef.current;
+      dragRef.current = {
+        id: event.pointerId,
+        x: event.clientX,
+        y: event.clientY,
+        tx: z.tx,
+        ty: z.ty,
+        moved: false,
+      };
+      setDragging(true);
+    };
+
+    const handlePointerMove = (event: React.PointerEvent) => {
+      if (!pointersRef.current.has(event.pointerId)) return;
+      pointersRef.current.set(event.pointerId, { x: event.clientX, y: event.clientY });
+
+      if (pointersRef.current.size >= 2 && pinchRef.current) {
+        event.preventDefault();
+        updatePinch();
+        return;
+      }
+
+      const drag = dragRef.current;
+      if (!drag || drag.id !== event.pointerId) return;
+      const dx = event.clientX - drag.x;
+      const dy = event.clientY - drag.y;
+      if (!drag.moved && Math.hypot(dx, dy) > DRAG_CLICK_SLOP) drag.moved = true;
+      commitZoom({
+        scale: zoomRef.current.scale,
+        tx: drag.tx + dx,
+        ty: drag.ty + dy,
+      });
+    };
+
+    const handlePointerUp = (event: React.PointerEvent) => {
+      pointersRef.current.delete(event.pointerId);
+      frameRef.current?.releasePointerCapture(event.pointerId);
+
+      if (pinchRef.current) {
+        if (pointersRef.current.size >= 2) {
+          beginPinch();
+          return;
+        }
+        pinchRef.current = null;
+        setDragging(false);
+        // Extra Things: one finger left after pinch — hand off to pan if still zoomed.
+        if (pointersRef.current.size === 1 && zoomRef.current.scale > 1.01) {
+          const [id, pt] = [...pointersRef.current.entries()][0];
+          const z = zoomRef.current;
+          dragRef.current = {
+            id,
+            x: pt.x,
+            y: pt.y,
+            tx: z.tx,
+            ty: z.ty,
+            moved: true,
+          };
+          setDragging(true);
+        } else {
+          dragRef.current = null;
+        }
+        return;
+      }
+
+      const drag = dragRef.current;
+      if (!drag || drag.id !== event.pointerId) return;
+      setDragging(false);
+      if (!drag.moved) dragRef.current = null;
+      else dragRef.current = { ...drag, moved: true };
+    };
+
+    const zoomed = zoom.scale > 1.01;
+
     return (
-      <Box
-        className={classNames(css.ImageViewer, className)}
-        direction="Column"
+      <div
+        className={classNames(css.Root, className)}
+        role="dialog"
+        aria-modal="true"
+        aria-label={alt || 'Image viewer'}
         {...props}
         ref={ref}
       >
-        <Header className={css.ImageViewerHeader} size="400">
-          <Box grow="Yes" alignItems="Center" gap="200">
-            <IconButton size="300" radii="300" onClick={requestClose}>
-              <Icon size="50" src={Icons.ArrowLeft} />
-            </IconButton>
-            <Text size="T300" truncate>
+        <div className={css.Backdrop} onClick={requestClose} aria-hidden />
+        <div className={css.Stage}>
+          <div className={css.Chrome}>
+            <div className={css.Title} title={alt}>
               {alt}
-            </Text>
-          </Box>
-          <Box shrink="No" alignItems="Center" gap="200">
-            <IconButton
-              variant={zoom < 1 ? 'Success' : 'SurfaceVariant'}
-              outlined={zoom < 1}
-              size="300"
-              radii="Pill"
-              onClick={zoomOut}
-              aria-label="Zoom Out"
-            >
-              <Icon size="50" src={Icons.Minus} />
-            </IconButton>
-            <Chip variant="SurfaceVariant" radii="Pill" onClick={() => setZoom(zoom === 1 ? 2 : 1)}>
-              <Text size="B300">{Math.round(zoom * 100)}%</Text>
-            </Chip>
-            <IconButton
-              variant={zoom > 1 ? 'Success' : 'SurfaceVariant'}
-              outlined={zoom > 1}
-              size="300"
-              radii="Pill"
-              onClick={zoomIn}
-              aria-label="Zoom In"
-            >
-              <Icon size="50" src={Icons.Plus} />
-            </IconButton>
-            <Chip
-              variant="Primary"
+            </div>
+            <button
+              type="button"
+              className={css.ChromeButton}
+              aria-label="Download"
               onClick={handleDownload}
-              radii="300"
-              before={<Icon size="50" src={Icons.Download} />}
             >
-              <Text size="B300">Download</Text>
-            </Chip>
-          </Box>
-        </Header>
-        <Box
-          grow="Yes"
-          className={css.ImageViewerContent}
-          justifyContent="Center"
-          alignItems="Center"
-        >
-          <img
-            className={css.ImageViewerImg}
-            style={{
-              cursor,
-              transform: `scale(${zoom}) translate(${pan.translateX}px, ${pan.translateY}px)`,
-            }}
-            src={src}
-            alt={alt}
-            draggable={false}
-            onMouseDown={onMouseDown}
-          />
-        </Box>
-      </Box>
+              <Icon size="50" src={Icons.Download} />
+            </button>
+            <button
+              type="button"
+              className={css.ChromeButton}
+              aria-label="Close"
+              onClick={requestClose}
+            >
+              <Icon size="50" src={Icons.Cross} />
+            </button>
+          </div>
+          <div
+            ref={frameRef}
+            className={css.Frame}
+            data-zoomed={zoomed || undefined}
+            data-pannable={zoomed || undefined}
+            data-dragging={dragging || undefined}
+            onClick={handleClick}
+            onPointerDown={handlePointerDown}
+            onPointerMove={handlePointerMove}
+            onPointerUp={handlePointerUp}
+            onPointerCancel={handlePointerUp}
+          >
+            <img
+              ref={imgRef}
+              className={css.Image}
+              src={src}
+              alt={alt}
+              draggable={false}
+              onLoad={fitImage}
+            />
+          </div>
+        </div>
+      </div>
     );
   }
 );

src/app/components/message/MsgTypeRenderers.tsx

@@ -27,6 +27,7 @@ import {
   MATRIX_SPOILER_REASON_PROPERTY_NAME,
 } from '../../../types/matrix/common';
 import { StationeryMedia, hashStationerySeed, stationeryMediaRot } from './StationeryMedia';
+import { getJumboEmojiInteractionProps, JumboEmojiClickHandler } from '../../features/room/emoji-confetti/jumboEmojiInteraction';
 import { FALLBACK_MIMETYPE, getBlobSafeMimeType } from '../../utils/mimeTypes';
 import { parseGeoUri, scaleYDimension } from '../../utils/common';
 import { resolveAttachmentBoxSize } from '../../state/mediaDimensionCache';
@@ -78,8 +79,9 @@ type MTextProps = {
   renderBody: (props: RenderBodyProps) => ReactNode;
   renderUrlsPreview?: (urls: string[]) => ReactNode;
   style?: CSSProperties;
+  onJumboEmojiClick?: JumboEmojiClickHandler;
 };
-export function MText({ edited, content, renderBody, renderUrlsPreview, style }: MTextProps) {
+export function MText({ edited, content, renderBody, renderUrlsPreview, style, onJumboEmojiClick }: MTextProps) {
   const { body, formatted_body: customBody } = content;
 
   if (typeof body !== 'string') return <BrokenContent />;
@@ -89,13 +91,20 @@ export function MText({ edited, content, renderBody, renderUrlsPreview, style }:
     : undefined;
   const urlsMatch = renderUrlsPreview && trimmedBody.match(URL_REG);
   const urls = urlsMatch ? [...new Set(urlsMatch)] : undefined;
+  const isJumboEmoji = JUMBO_EMOJI_REG.test(trimmedBody);
+  const jumboEmojiInteraction = getJumboEmojiInteractionProps({
+    body: trimmedBody,
+    isJumboEmoji,
+    onJumboEmojiClick,
+  });
 
   return (
     <>
       <MessageTextBody
         preWrap={typeof customBody !== 'string'}
-        jumboEmoji={JUMBO_EMOJI_REG.test(trimmedBody)}
+        jumboEmoji={isJumboEmoji}
         style={style}
+        {...jumboEmojiInteraction}
       >
         {renderBody({
           body: trimmedBody,
@@ -114,6 +123,7 @@ type MEmoteProps = {
   content: Record<string, unknown>;
   renderBody: (props: RenderBodyProps) => ReactNode;
   renderUrlsPreview?: (urls: string[]) => ReactNode;
+  onJumboEmojiClick?: JumboEmojiClickHandler;
 };
 export function MEmote({
   displayName,
@@ -121,6 +131,7 @@ export function MEmote({
   content,
   renderBody,
   renderUrlsPreview,
+  onJumboEmojiClick,
 }: MEmoteProps) {
   const { body, formatted_body: customBody } = content;
 
@@ -131,20 +142,28 @@ export function MEmote({
     : undefined;
   const urlsMatch = renderUrlsPreview && trimmedBody.match(URL_REG);
   const urls = urlsMatch ? [...new Set(urlsMatch)] : undefined;
+  const isJumboEmoji = JUMBO_EMOJI_REG.test(trimmedBody);
+  const jumboEmojiInteraction = getJumboEmojiInteractionProps({
+    body: trimmedBody,
+    isJumboEmoji,
+    onJumboEmojiClick,
+  });
 
   return (
     <>
       <MessageTextBody
         emote
         preWrap={typeof customBody !== 'string'}
-        jumboEmoji={JUMBO_EMOJI_REG.test(trimmedBody)}
+        jumboEmoji={isJumboEmoji}
       >
         <b>{`${displayName} `}</b>
-        {renderBody({
-          body: trimmedBody,
-          customBody: trimmedCustomBody,
-        })}
-        {edited && <MessageEditedContent />}
+        <span {...jumboEmojiInteraction}>
+          {renderBody({
+            body: trimmedBody,
+            customBody: trimmedCustomBody,
+          })}
+          {edited && <MessageEditedContent />}
+        </span>
       </MessageTextBody>
       {renderUrlsPreview && urls && urls.length > 0 && renderUrlsPreview(urls)}
     </>
@@ -156,8 +175,9 @@ type MNoticeProps = {
   content: Record<string, unknown>;
   renderBody: (props: RenderBodyProps) => ReactNode;
   renderUrlsPreview?: (urls: string[]) => ReactNode;
+  onJumboEmojiClick?: JumboEmojiClickHandler;
 };
-export function MNotice({ edited, content, renderBody, renderUrlsPreview }: MNoticeProps) {
+export function MNotice({ edited, content, renderBody, renderUrlsPreview, onJumboEmojiClick }: MNoticeProps) {
   const { body, formatted_body: customBody } = content;
 
   if (typeof body !== 'string') return <BrokenContent />;
@@ -167,13 +187,20 @@ export function MNotice({ edited, content, renderBody, renderUrlsPreview }: MNot
     : undefined;
   const urlsMatch = renderUrlsPreview && trimmedBody.match(URL_REG);
   const urls = urlsMatch ? [...new Set(urlsMatch)] : undefined;
+  const isJumboEmoji = JUMBO_EMOJI_REG.test(trimmedBody);
+  const jumboEmojiInteraction = getJumboEmojiInteractionProps({
+    body: trimmedBody,
+    isJumboEmoji,
+    onJumboEmojiClick,
+  });
 
   return (
     <>
       <MessageTextBody
         notice
         preWrap={typeof customBody !== 'string'}
-        jumboEmoji={JUMBO_EMOJI_REG.test(trimmedBody)}
+        jumboEmoji={isJumboEmoji}
+        {...jumboEmojiInteraction}
       >
         {renderBody({
           body: trimmedBody,

src/app/components/message/content/ImageContent.tsx

@@ -1,5 +1,5 @@
 import React, { ReactNode, useCallback, useEffect, useState } from 'react';
-import { Badge, Box, Button, Chip, Modal, Overlay, OverlayBackdrop, OverlayCenter, Spinner, Text, Tooltip, TooltipProvider, as } from 'folds';
+import { Badge, Box, Button, Chip, Overlay, Spinner, Text, Tooltip, TooltipProvider, as } from 'folds';
 import { Icon, Icons } from '../../icons';
 import classNames from 'classnames';
 import { Blurhash } from 'react-blurhash';
@@ -14,7 +14,6 @@ import { FALLBACK_MIMETYPE } from '../../../utils/mimeTypes';
 import { stopPropagation } from '../../../utils/keyboard';
 import { decryptFile, downloadEncryptedMedia, mxcUrlToHttp } from '../../../utils/matrix';
 import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
-import { ModalWide } from '../../../styles/Modal.css';
 import { validBlurHash } from '../../../utils/blurHash';
 import { getCurrentAccessToken } from '../../../utils/auth';
 import { setMediaDimensions, getMediaBlurHash, getMediaDimensions, rememberMediaBlurHash } from '../../../state/mediaDimensionCache';
@@ -192,28 +191,21 @@ export const ImageContent = as<'div', ImageContentProps>(
             <div className={css.MediaSkeleton} />
           ))}
         {srcState.status === AsyncStatus.Success && (
-          <Overlay open={viewer} backdrop={<OverlayBackdrop />}>
-            <OverlayCenter>
-              <FocusTrap
-                focusTrapOptions={{
-                  initialFocus: false,
-                  onDeactivate: () => setViewer(false),
-                  clickOutsideDeactivates: true,
-                  escapeDeactivates: stopPropagation,
-                }}
-              >
-                <Modal
-                  className={ModalWide}
-                  size="500"
-                >
-                  {renderViewer({
-                    src: srcState.data,
-                    alt: body,
-                    requestClose: () => setViewer(false),
-                  })}
-                </Modal>
-              </FocusTrap>
-            </OverlayCenter>
+          <Overlay open={viewer} backdrop={null}>
+            <FocusTrap
+              focusTrapOptions={{
+                initialFocus: false,
+                onDeactivate: () => setViewer(false),
+                clickOutsideDeactivates: true,
+                escapeDeactivates: stopPropagation,
+              }}
+            >
+              {renderViewer({
+                src: srcState.data,
+                alt: body,
+                requestClose: () => setViewer(false),
+              })}
+            </FocusTrap>
           </Overlay>
         )}
         {!autoPlay && !markedAsSpoiler && srcState.status === AsyncStatus.Idle && (

src/app/components/message/layout/layout.css.ts

@@ -243,6 +243,9 @@ export const MessageTextBody = recipe({
         overflow: 'visible',
         overflowY: 'visible',
         paddingBottom: config.space.S200,
+        cursor: 'pointer',
+        position: 'relative',
+        zIndex: 5,
       },
     },
     emote: {
@@ -263,6 +266,8 @@ globalStyle(`${jumboEmojiClass} .${htmlCss.EmoticonBase}`, {
   padding: 0,
   overflow: 'visible',
   verticalAlign: 'middle',
+  position: 'relative',
+  zIndex: 1,
 });
 
 globalStyle(`${jumboEmojiClass} .${htmlCss.Emoticon.classNames.base}`, {

src/app/components/user-profile/UserHero.tsx

@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import { Avatar, Box, Modal, Overlay, OverlayBackdrop, OverlayCenter, Text, toRem } from 'folds';
+import { Avatar, Box, Overlay, Text, toRem } from 'folds';
 import { Icon, Icons } from '../icons';
 import classNames from 'classnames';
 import FocusTrap from 'focus-trap-react';
@@ -87,25 +87,21 @@ export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroPro
           </Avatar>
         </AvatarPresence>
         {viewAvatar && (
-          <Overlay open backdrop={<OverlayBackdrop />}>
-            <OverlayCenter>
-              <FocusTrap
-                focusTrapOptions={{
-                  initialFocus: false,
-                  onDeactivate: () => setViewAvatar(undefined),
-                  clickOutsideDeactivates: true,
-                  escapeDeactivates: stopPropagation,
-                }}
-              >
-                <Modal size="500" onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}>
-                  <ImageViewer
-                    src={viewAvatar}
-                    alt={userId}
-                    requestClose={() => setViewAvatar(undefined)}
-                  />
-                </Modal>
-              </FocusTrap>
-            </OverlayCenter>
+          <Overlay open backdrop={null}>
+            <FocusTrap
+              focusTrapOptions={{
+                initialFocus: false,
+                onDeactivate: () => setViewAvatar(undefined),
+                clickOutsideDeactivates: true,
+                escapeDeactivates: stopPropagation,
+              }}
+            >
+              <ImageViewer
+                src={viewAvatar}
+                alt={userId}
+                requestClose={() => setViewAvatar(undefined)}
+              />
+            </FocusTrap>
           </Overlay>
         )}
       </div>

src/app/features/common-settings/developer-tools/SendRoomEvent.tsx

@@ -1,6 +1,6 @@
 import React, { useCallback, useRef, useState, FormEventHandler, useEffect } from 'react';
 import { MatrixError } from 'matrix-js-sdk';
-import { Box, Chip, IconButton, Text, config, Button, Spinner, color, TextAreaComponent as TextArea, Input } from 'folds';
+import { Box, Chip, IconButton, Text, config, Button, Spinner, color, TextArea, Input } from 'folds';
 import { Icon, Icons } from '../../../components/icons';
 import { Page, PageHeader } from '../../../components/page';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
@@ -171,7 +171,7 @@ export function SendRoomEvent({ type, stateKey, requestClose }: SendRoomEventPro
             <Box shrink="No">
               <Text size="L400">JSON Content</Text>
             </Box>
-            <TextAreaComponent
+            <TextArea
               ref={textAreaRef}
               name="contentTextArea"
               style={{ fontFamily: 'monospace' }}

src/app/features/common-settings/developer-tools/StateEventEditor.tsx

@@ -1,5 +1,5 @@
 import React, { FormEventHandler, useCallback, useEffect, useMemo, useRef, useState } from 'react';
-import { Box, Text, IconButton, Chip, Scroll, config, TextAreaComponent as TextArea, color, Spinner, Button } from 'folds';
+import { Box, Text, IconButton, Chip, Scroll, config, TextArea, color, Spinner, Button } from 'folds';
 import { Icon, Icons } from '../../../components/icons';
 import { MatrixError } from 'matrix-js-sdk';
 import { Page, PageHeader } from '../../../components/page';
@@ -153,7 +153,7 @@ function StateEventEdit({ type, stateKey, content, requestClose }: StateEventEdi
         <Box shrink="No">
           <Text size="L400">JSON Content</Text>
         </Box>
-        <TextAreaComponent
+        <TextArea
           ref={textAreaRef}
           name="contentTextArea"
           style={{ fontFamily: 'monospace' }}

src/app/features/room-app/RoomAppSchema.tsx

@@ -0,0 +1,205 @@
+import React, { useCallback, useMemo, useState } from 'react';
+import { Box, Button, Input, Text, config } from 'folds';
+import { MatrixClient } from 'matrix-js-sdk';
+import {
+  PaarrotUiActionContent,
+  PaarrotUiButtonNode,
+  PaarrotUiContent,
+  PaarrotUiNode,
+} from '../../../types/matrix/room';
+import { mxcUrlToHttp } from '../../utils/matrix';
+import { isAllowedRoomAppImageSrc, scopeRoomAppCss } from './sanitizeRoomAppCss';
+import * as css from './RoomAppView.css';
+
+const SCOPE = '[data-room-app]';
+
+type RoomAppSchemaProps = {
+  mx: MatrixClient;
+  content: PaarrotUiContent;
+  uiEventId?: string;
+  useAuthentication: boolean;
+  onAction: (payload: PaarrotUiActionContent) => void | Promise<void>;
+};
+
+function fieldName(node: { id: string; name?: string }): string {
+  return node.name || node.id;
+}
+
+function spacerSize(size?: number): 'sm' | 'md' | 'lg' {
+  if (typeof size === 'number' && size <= 8) return 'sm';
+  if (typeof size === 'number' && size >= 24) return 'lg';
+  return 'md';
+}
+
+export function RoomAppSchema({
+  mx,
+  content,
+  uiEventId,
+  useAuthentication,
+  onAction,
+}: RoomAppSchemaProps) {
+  const [values, setValues] = useState<Record<string, string>>({});
+  const [sending, setSending] = useState(false);
+
+  const scopedCss = useMemo(
+    () => (content.css ? scopeRoomAppCss(content.css, SCOPE) : ''),
+    [content.css]
+  );
+
+  const setField = useCallback((name: string, value: string) => {
+    setValues((prev) => ({ ...prev, [name]: value }));
+  }, []);
+
+  const handleButton = useCallback(
+    async (node: PaarrotUiButtonNode) => {
+      if (node.disabled || sending) return;
+      setSending(true);
+      try {
+        await onAction({
+          action: node.action,
+          component_id: node.id,
+          value: node.value,
+          values: { ...values },
+          ui_event_id: uiEventId,
+        });
+      } finally {
+        setSending(false);
+      }
+    },
+    [onAction, sending, uiEventId, values]
+  );
+
+  const renderNode = (node: PaarrotUiNode): React.ReactNode => {
+    switch (node.type) {
+      case 'panel':
+        return (
+          <div key={node.id} className={css.Panel} data-room-app-node={node.id}>
+            {node.children?.map((child) => renderNode(child))}
+          </div>
+        );
+      case 'row':
+        return (
+          <div key={node.id} className={css.Row} data-room-app-node={node.id}>
+            {node.children?.map((child) => renderNode(child))}
+          </div>
+        );
+      case 'text':
+        return (
+          <Text
+            key={node.id}
+            as="p"
+            size="T400"
+            className={node.className}
+            data-room-app-node={node.id}
+          >
+            {node.text ?? ''}
+          </Text>
+        );
+      case 'button': {
+        const variant = node.variant ?? 'Primary';
+        return (
+          <Button
+            key={node.id}
+            type="button"
+            size="400"
+            variant={variant}
+            radii="300"
+            disabled={node.disabled || sending}
+            onClick={() => handleButton(node)}
+            data-room-app-node={node.id}
+          >
+            <Text size="B400">{node.label}</Text>
+          </Button>
+        );
+      }
+      case 'input': {
+        const name = fieldName(node);
+        const current = values[name] ?? node.value ?? '';
+        return (
+          <div key={node.id} className={css.Field} data-room-app-node={node.id}>
+            {node.label && (
+              <Text as="label" size="L400" htmlFor={`room-app-${node.id}`}>
+                {node.label}
+              </Text>
+            )}
+            <Input
+              id={`room-app-${node.id}`}
+              name={name}
+              variant="Background"
+              radii="300"
+              type={node.inputType ?? 'text'}
+              placeholder={node.placeholder}
+              value={current}
+              onChange={(evt) => setField(name, evt.currentTarget.value)}
+            />
+          </div>
+        );
+      }
+      case 'select': {
+        const name = fieldName(node);
+        const current = values[name] ?? node.value ?? '';
+        return (
+          <div key={node.id} className={css.Field} data-room-app-node={node.id}>
+            {node.label && (
+              <Text as="label" size="L400" htmlFor={`room-app-${node.id}`}>
+                {node.label}
+              </Text>
+            )}
+            <Box as="span" grow="Yes" style={{ position: 'relative' }}>
+              <select
+                id={`room-app-${node.id}`}
+                name={name}
+                value={current}
+                onChange={(evt) => setField(name, evt.currentTarget.value)}
+                style={{
+                  width: '100%',
+                  padding: `${config.space.S200} ${config.space.S300}`,
+                  borderRadius: config.radii.R300,
+                  border: '1px solid var(--bq-border, CurrentColor)',
+                  background: 'transparent',
+                  color: 'inherit',
+                  font: 'inherit',
+                }}
+              >
+                {(node.options ?? []).map((opt) => (
+                  <option key={opt.value} value={opt.value}>
+                    {opt.label}
+                  </option>
+                ))}
+              </select>
+            </Box>
+          </div>
+        );
+      }
+      case 'image': {
+        if (!isAllowedRoomAppImageSrc(node.src)) return null;
+        const httpSrc = node.src.startsWith('mxc://')
+          ? mxcUrlToHttp(mx, node.src, useAuthentication) ?? undefined
+          : node.src;
+        if (!httpSrc) return null;
+        return (
+          <img
+            key={node.id}
+            className={css.Image}
+            src={httpSrc}
+            alt={node.alt ?? ''}
+            width={node.width}
+            height={node.height}
+            data-room-app-node={node.id}
+          />
+        );
+      }
+      case 'spacer':
+        return <div key={node.id} className={css.Spacer({ size: spacerSize(node.size) })} />;
+      default:
+        return null;
+    }
+  };
+
+  return (
+    <div data-room-app="">
+      {scopedCss ? <style>{scopedCss}</style> : null}
+      {renderNode(content.root)}
+    </div>
+  );
+}

src/app/features/room-app/RoomAppView.css.ts

@@ -0,0 +1,74 @@
+import { style } from '@vanilla-extract/css';
+import { recipe } from '@vanilla-extract/recipes';
+import { DefaultReset, config, toRem } from 'folds';
+
+export const Root = style([
+  DefaultReset,
+  {
+    display: 'flex',
+    flexDirection: 'column',
+    flexGrow: 1,
+    minHeight: 0,
+    minWidth: 0,
+  },
+]);
+
+export const Header = style({
+  paddingLeft: config.space.S200,
+  paddingRight: config.space.S200,
+});
+
+export const Body = style([
+  DefaultReset,
+  {
+    flexGrow: 1,
+    minHeight: 0,
+    overflow: 'auto',
+    padding: config.space.S400,
+  },
+]);
+
+export const Panel = style({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S300,
+  width: '100%',
+});
+
+export const Row = style({
+  display: 'flex',
+  flexDirection: 'row',
+  flexWrap: 'wrap',
+  gap: config.space.S200,
+  alignItems: 'center',
+});
+
+export const Field = style({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S100,
+  minWidth: toRem(160),
+  flexGrow: 1,
+});
+
+export const Image = style({
+  maxWidth: '100%',
+  height: 'auto',
+  borderRadius: config.radii.R300,
+});
+
+export const Spacer = recipe({
+  base: {
+    flexShrink: 0,
+  },
+  variants: {
+    size: {
+      sm: { height: config.space.S200 },
+      md: { height: config.space.S400 },
+      lg: { height: config.space.S600 },
+    },
+  },
+  defaultVariants: {
+    size: 'md',
+  },
+});

src/app/features/room-app/RoomAppView.tsx

@@ -0,0 +1,67 @@
+import React, { useCallback } from 'react';
+import { Box, Button, Header, Text, config } from 'folds';
+import { Room } from 'matrix-js-sdk';
+import { Page } from '../../components/page';
+import { useMatrixClient } from '../../hooks/useMatrixClient';
+import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
+import { useStateEvent } from '../../hooks/useStateEvent';
+import { useRoomName } from '../../hooks/useRoomMeta';
+import {
+  MessageEvent,
+  PaarrotUiActionContent,
+  StateEvent,
+} from '../../../types/matrix/room';
+import { parsePaarrotUiContent } from '../../utils/room';
+import { RoomAppSchema } from './RoomAppSchema';
+import * as css from './RoomAppView.css';
+
+type RoomAppViewProps = {
+  room: Room;
+  onShowChat: () => void;
+};
+
+export function RoomAppView({ room, onShowChat }: RoomAppViewProps) {
+  const mx = useMatrixClient();
+  const useAuthentication = useMediaAuthentication();
+  const roomName = useRoomName(room);
+  const uiEvent = useStateEvent(room, StateEvent.PaarrotUi);
+  const content = parsePaarrotUiContent(uiEvent?.getContent());
+  const title = content?.title || roomName || 'Room App';
+
+  const handleAction = useCallback(
+    async (payload: PaarrotUiActionContent) => {
+      await mx.sendEvent(room.roomId, MessageEvent.PaarrotUiAction as any, payload);
+    },
+    [mx, room.roomId]
+  );
+
+  return (
+    <Page>
+      <Header className={css.Header} size="600">
+        <Box grow="Yes" alignItems="Center" gap="200">
+          <Box grow="Yes" alignItems="Center" gap="200" minWidth="0">
+            <Text size="H6" truncate>
+              {title}
+            </Text>
+          </Box>
+          <Button size="300" variant="Secondary" radii="300" onClick={onShowChat}>
+            <Text size="B300">Show chat</Text>
+          </Button>
+        </Box>
+      </Header>
+      <Box className={css.Body} grow="Yes" direction="Column" style={{ gap: config.space.S400 }}>
+        {content ? (
+          <RoomAppSchema
+            mx={mx}
+            content={content}
+            uiEventId={uiEvent?.getId()}
+            useAuthentication={useAuthentication}
+            onAction={handleAction}
+          />
+        ) : (
+          <Text size="T400">This room’s app UI is missing or invalid.</Text>
+        )}
+      </Box>
+    </Page>
+  );
+}

src/app/features/room-app/index.ts

@@ -0,0 +1,7 @@
+export { RoomAppView } from './RoomAppView';
+export { RoomAppSchema } from './RoomAppSchema';
+export {
+  sanitizeRoomAppCss,
+  scopeRoomAppCss,
+  isAllowedRoomAppImageSrc,
+} from './sanitizeRoomAppCss';

src/app/features/room-app/sanitizeRoomAppCss.ts

@@ -0,0 +1,91 @@
+/**
+ * Strip dangerous CSS constructs from bot-supplied stylesheets.
+ * Not a full CSS parser — best-effort for MVP scoped injection.
+ */
+export function sanitizeRoomAppCss(css: string): string {
+  let out = css;
+  out = out.replace(/@import\b[^;{]*;?/gi, '');
+  out = out.replace(/url\s*\(\s*['"]?\s*javascript:[^)]*\)/gi, 'url(about:blank)');
+  out = out.replace(/expression\s*\([^)]*\)/gi, 'initial');
+  out = out.replace(/-moz-binding\s*:[^;]+;?/gi, '');
+  out = out.replace(/behavior\s*:[^;]+;?/gi, '');
+  out = out.replace(/@charset\b[^;]*;?/gi, '');
+  return out;
+}
+
+/**
+ * Prefix plain selectors with a scope so bot CSS cannot escape the room app root.
+ * At-rules (@media, @supports, @keyframes) are kept with nested rules re-scoped where possible.
+ */
+export function scopeRoomAppCss(css: string, scopeSelector: string): string {
+  const sanitized = sanitizeRoomAppCss(css).trim();
+  if (!sanitized) return '';
+
+  const scopeRule = (selectors: string, body: string): string => {
+    const scoped = selectors
+      .split(',')
+      .map((s) => {
+        const sel = s.trim();
+        if (!sel) return '';
+        if (sel.startsWith(scopeSelector)) return sel;
+        return `${scopeSelector} ${sel}`;
+      })
+      .filter(Boolean)
+      .join(', ');
+    return `${scoped}{${body}}`;
+  };
+
+  const rewriteBlock = (block: string): string => {
+    const trimmed = block.trim();
+    if (!trimmed) return '';
+
+    if (trimmed.startsWith('@')) {
+      const open = trimmed.indexOf('{');
+      if (open === -1) return `${trimmed};`;
+      const header = trimmed.slice(0, open).trim();
+      const inner = trimmed.slice(open + 1);
+      // @keyframes / @font-face: keep as-is (namespaced risk is low for MVP)
+      if (/^@(keyframes|font-face)\b/i.test(header)) {
+        return `${header}{${inner}}`;
+      }
+      // @media / @supports: re-scope nested rules
+      const nested = rewriteCssChunk(inner);
+      return `${header}{${nested}}`;
+    }
+
+    const open = trimmed.indexOf('{');
+    if (open === -1) return '';
+    const selectors = trimmed.slice(0, open);
+    const body = trimmed.slice(open + 1);
+    return scopeRule(selectors, body);
+  };
+
+  const rewriteCssChunk = (chunk: string): string => {
+    const parts: string[] = [];
+    let depth = 0;
+    let start = 0;
+    for (let i = 0; i < chunk.length; i += 1) {
+      const ch = chunk[i];
+      if (ch === '{') depth += 1;
+      else if (ch === '}') {
+        depth -= 1;
+        if (depth === 0) {
+          parts.push(rewriteBlock(chunk.slice(start, i)));
+          start = i + 1;
+        }
+      }
+    }
+    return parts.filter(Boolean).join('\n');
+  };
+
+  return rewriteCssChunk(sanitized);
+}
+
+export function isAllowedRoomAppImageSrc(src: string): boolean {
+  const trimmed = src.trim();
+  return (
+    trimmed.startsWith('mxc://') ||
+    trimmed.startsWith('https://') ||
+    trimmed.startsWith('http://')
+  );
+}

src/app/features/room-settings/permissions/usePermissionItems.ts

@@ -204,6 +204,19 @@ export const usePermissionGroups = (): PermissionGroup[] => {
           },
           name: 'Modify Widgets',
         },
+        {
+          location: {
+            state: true,
+            key: StateEvent.PaarrotUi,
+          },
+          name: 'Set Room App UI',
+        },
+        {
+          location: {
+            key: MessageEvent.PaarrotUiAction,
+          },
+          name: 'Send Room App Actions',
+        },
       ],
     };
 

src/app/features/room/Room.tsx

@@ -1,5 +1,5 @@
-import React, { useCallback, useEffect } from 'react';
-import { Box, Line } from 'folds';
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import { Box, Button, Line, Text, config } from 'folds';
 import { decodeRouteParam } from '../../pages/pathUtils';
 import { useParams } from 'react-router-dom';
 import { isKeyHotkey } from 'is-hotkey';
@@ -18,8 +18,11 @@ import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRoomMembers } from '../../hooks/useRoomMembers';
 import { activeRoomIdAtom } from '../../state/activeRoom';
 import { isMediaDrawerAtom } from '../../state/mediaDrawer';
-import { isForum } from '../../utils/room';
+import { isForum, parsePaarrotUiContent } from '../../utils/room';
 import { ForumRoomView } from './ForumRoomView';
+import { useStateEvent } from '../../hooks/useStateEvent';
+import { StateEvent } from '../../../types/matrix/room';
+import { RoomAppView } from '../room-app';
 
 export function Room() {
   const { eventId: rawEventId } = useParams();
@@ -41,6 +44,16 @@ export function Room() {
   const showRightDrawer =
     !skinny && (isPeopleDrawer || isMediaDrawer);
 
+  const uiEvent = useStateEvent(room, StateEvent.PaarrotUi);
+  const hasAppUi = useMemo(() => !!parsePaarrotUiContent(uiEvent?.getContent()), [uiEvent]);
+  const [preferChat, setPreferChat] = useState(false);
+
+  useEffect(() => {
+    setPreferChat(false);
+  }, [room.roomId]);
+
+  const showAppView = !forumRoom && hasAppUi && !preferChat;
+
   // Update titlebar with current room ID
   useEffect(() => {
     setActiveRoomId(room.roomId);
@@ -63,10 +76,38 @@ export function Room() {
     <PowerLevelsContextProvider value={powerLevels}>
       <Box grow="Yes">
         {!showMediaSolo &&
-          (forumRoom ? (
+          (showAppView ? (
+            <RoomAppView room={room} onShowChat={() => setPreferChat(true)} />
+          ) : forumRoom ? (
             <ForumRoomView room={room} eventId={eventId} />
           ) : (
-            <RoomView room={room} eventId={eventId} />
+            <Box grow="Yes" direction="Column" style={{ minWidth: 0, minHeight: 0 }}>
+              {hasAppUi && preferChat && (
+                <Box
+                  shrink="No"
+                  alignItems="Center"
+                  justifyContent="SpaceBetween"
+                  gap="200"
+                  style={{
+                    padding: `${config.space.S200} ${config.space.S300}`,
+                    borderBottom: '1px solid var(--bq-surface-border, CurrentColor)',
+                  }}
+                >
+                  <Text size="T300">Room app available</Text>
+                  <Button
+                    size="300"
+                    variant="Primary"
+                    radii="300"
+                    onClick={() => setPreferChat(false)}
+                  >
+                    <Text size="B300">Show app</Text>
+                  </Button>
+                </Box>
+              )}
+              <Box grow="Yes" direction="Column" style={{ minWidth: 0, minHeight: 0 }}>
+                <RoomView room={room} eventId={eventId} />
+              </Box>
+            </Box>
           ))}
         {showMediaSolo && <MediaDrawer room={room} solo />}
         {!showMediaSolo && showRightDrawer && (

src/app/features/room/RoomTimeline.tsx

@@ -137,6 +137,8 @@ import {
   PAARROT_CAROUSEL_TOTAL_PROPERTY_NAME,
   PAARROT_CAROUSEL_UUID_PROPERTY_NAME,
 } from '../../../types/matrix/common';
+import { EmojiConfettiOverlay } from './emoji-confetti/EmojiConfettiOverlay';
+import { useJumboEmojiConfetti } from './emoji-confetti/useJumboEmojiConfetti';
 
 /** Information about a call member event for grouping */
 interface CallEventInfo {
@@ -582,6 +584,8 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
   );
   const [showHiddenEvents] = useSetting(settingsAtom, 'showHiddenEvents');
   const [showDeveloperTools] = useSetting(settingsAtom, 'developerTools');
+  const { bursts: emojiConfettiBursts, removeBurst: removeEmojiConfettiBurst, handleJumboEmojiClick } =
+    useJumboEmojiConfetti(room);
 
   const [hour24Clock] = useSetting(settingsAtom, 'hour24Clock');
   const [dateFormatString] = useSetting(settingsAtom, 'dateFormatString');
@@ -785,9 +789,16 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
   atLiveEndRef.current = liveTimelineLinked && rangeAtEnd;
 
   // Historical / non-live windows are never "at bottom" of the room.
+  // When we return to the live end, re-check scroll — IntersectionObserver may
+  // not re-fire if the anchor stayed intersecting across the transition.
   useEffect(() => {
     if (!liveTimelineLinked || !rangeAtEnd) {
       setAtBottom(false);
+      return;
+    }
+    const scrollEl = scrollRef.current;
+    if (scrollEl && isScrolledToBottom(scrollEl, 100)) {
+      setAtBottom(true);
     }
   }, [liveTimelineLinked, rangeAtEnd]);
 
@@ -1034,11 +1045,16 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
         if (!targetEntry) return;
 
         // Leave the live bottom immediately so Jump to Latest stays available.
-        if (!targetEntry.isIntersecting || !atLiveEndRef.current) {
+        // Only intersection clears atBottom here; !atLiveEnd is handled by the
+        // liveTimelineLinked/rangeAtEnd effect so we don't stick false when the
+        // live end reconnects without a new intersection event.
+        if (!targetEntry.isIntersecting) {
           setAtBottom(false);
           return;
         }
 
+        if (!atLiveEndRef.current) return;
+
         setAtBottom(true);
         setLatestUnreadMessage(null);
         if (document.hasFocus()) {
@@ -1145,7 +1161,16 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
     const onScroll = () => {
       if (restoringScrollRef.current) return;
       window.cancelAnimationFrame(raf);
-      raf = window.requestAnimationFrame(() => persistTimelineScroll(roomId));
+      raf = window.requestAnimationFrame(() => {
+        persistTimelineScroll(roomId);
+        // Keep Jump to Latest in sync with real scroll position when on the live end.
+        // IntersectionObserver alone can miss transitions and leave atBottom stuck.
+        if (atLiveEndRef.current) {
+          const at = isScrolledToBottom(scrollEl, 100);
+          setAtBottom(at);
+          if (at) setLatestUnreadMessage(null);
+        }
+      });
     };
 
     scrollEl.addEventListener('scroll', onScroll, { passive: true });
@@ -1250,6 +1275,9 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
           scrollToBottomRef.current.smooth,
           scrollToBottomRef.current.force
         );
+        if (atLiveEndRef.current) {
+          setAtBottom(true);
+        }
       }
     }
   }, [scrollToBottomCount]);
@@ -1573,6 +1601,8 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                 linkifyOpts={linkifyOpts}
                 outlineAttachment={messageLayout === MessageLayout.Bubble}
                 disabledEmbedPatterns={combinedEmbedFilters}
+                targetEventId={mEventId}
+                onJumboEmojiClick={handleJumboEmojiClick}
               />
             )}
           </Message>
@@ -1681,6 +1711,8 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                       linkifyOpts={linkifyOpts}
                       outlineAttachment={messageLayout === MessageLayout.Bubble}
                       disabledEmbedPatterns={combinedEmbedFilters}
+                      targetEventId={mEventId}
+                      onJumboEmojiClick={handleJumboEmojiClick}
                     />
                   );
                 }
@@ -1978,6 +2010,8 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
         // Return special marker for call event (will be handled by eventRenderer)
         return 'CALL_EVENT_PENDING' as unknown as React.ReactNode;
       },
+      [MessageEvent.RelayEmojiConfetti]: () => null,
+      [MessageEvent.PaarrotUiAction]: () => null,
     },
     (mEventId, mEvent, item) => {
       if (!showHiddenEvents) return null;
@@ -2588,7 +2622,12 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                 </MessageBase>
               </>
             ))}
-          <span ref={atBottomAnchorRef} />
+          {/* 1×1 so IntersectionObserver reliably detects the live bottom */}
+          <span
+            ref={atBottomAnchorRef}
+            aria-hidden
+            style={{ display: 'block', width: 1, height: 1 }}
+          />
         </Box>
       </Scroll>
       {(showUnreadTop || returnToEventId) && (
@@ -2675,6 +2714,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
           </Box>
         </TimelineFloat>
       )}
+      <EmojiConfettiOverlay bursts={emojiConfettiBursts} onBurstComplete={removeEmojiConfettiBurst} />
     </Box>
   );
 }

src/app/features/room/ThreadView.tsx

@@ -65,6 +65,8 @@ import * as roomViewCss from './RoomViewFollowing.css';
 import { Message, Reactions, EncryptedContent } from './message';
 import { Reply } from '../../components/message';
 import { RenderMessageContent } from '../../components/RenderMessageContent';
+import { EmojiConfettiOverlay } from './emoji-confetti/EmojiConfettiOverlay';
+import { useJumboEmojiConfetti } from './emoji-confetti/useJumboEmojiConfetti';
 import {
   LINKIFY_OPTS,
   factoryRenderLinkifyWithMention,
@@ -156,6 +158,8 @@ export function ThreadView({ room, threadRootId }: ThreadViewProps) {
   const [hour24Clock] = useSetting(settingsAtom, 'hour24Clock');
   const [dateFormatString] = useSetting(settingsAtom, 'dateFormatString');
   const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
+  const { bursts: emojiConfettiBursts, removeBurst: removeEmojiConfettiBurst, handleJumboEmojiClick } =
+    useJumboEmojiConfetti(room);
 
   const showUrlPreview = room.hasEncryptionStateEvent() ? encUrlPreview : urlPreview;
   const direct = useIsDirectRoom();
@@ -638,6 +642,8 @@ export function ThreadView({ room, threadRootId }: ThreadViewProps) {
                 linkifyOpts={linkifyOpts}
                 outlineAttachment={messageLayout === MessageLayout.Bubble}
                 disabledEmbedPatterns={combinedEmbedFilters}
+                targetEventId={mEventId}
+                onJumboEmojiClick={handleJumboEmojiClick}
               />
             )}
           </EncryptedContent>
@@ -654,6 +660,8 @@ export function ThreadView({ room, threadRootId }: ThreadViewProps) {
             linkifyOpts={linkifyOpts}
             outlineAttachment={messageLayout === MessageLayout.Bubble}
             disabledEmbedPatterns={combinedEmbedFilters}
+            targetEventId={mEventId}
+            onJumboEmojiClick={handleJumboEmojiClick}
           />
         )}
       </Message>
@@ -759,6 +767,10 @@ export function ThreadView({ room, threadRootId }: ThreadViewProps) {
               {events.map((evt, idx, arr) => renderEvent(evt, idx, arr))}
             </Box>
           </Scroll>
+          <EmojiConfettiOverlay
+            bursts={emojiConfettiBursts}
+            onBurstComplete={removeEmojiConfettiBurst}
+          />
         </Box>
         <div className={roomViewCss.RoomViewBottomFloat}>
           <RoomViewTyping room={room} />

src/app/features/room/emoji-confetti/EmojiConfettiBurstCanvas.tsx

@@ -0,0 +1,375 @@
+import React, { useEffect, useMemo, useRef } from 'react';
+import { createPortal } from 'react-dom';
+import { EmojiConfettiBurst } from './types';
+import { findJumboEmojiElement, getLocalBurstCanvasSize, measureJumboGlyph, setJumboEmojiHidden } from './findJumboMount';
+import {
+  BurstParticle,
+  drawBurstParticles,
+  spawnEmojiBurst,
+  stepBurstParticles,
+} from './emojiBurstEngine';
+import { getEmojiBurstProfile, isFullscreenBurstEmoji } from './emojiParticleProfiles';
+import {
+  createFireworkSim,
+  drawFireworkSim,
+  FireworkSim,
+  getFireworkDpr,
+  stepFireworkSim,
+  syncFireworkHero,
+} from './fireworkParticleEngine';
+
+const MAX_DPR = 2;
+
+type EmojiConfettiBurstCanvasProps = {
+  burst: EmojiConfettiBurst;
+  onComplete: (burstId: string) => void;
+};
+
+export function EmojiConfettiBurstCanvas({ burst, onComplete }: EmojiConfettiBurstCanvasProps) {
+  const primaryEmoji = burst.emojis[0] ?? '🎉';
+  const fullscreen = isFullscreenBurstEmoji(primaryEmoji);
+
+  if (fullscreen) {
+    return <FireworkBurstCanvas burst={burst} primaryEmoji={primaryEmoji} onComplete={onComplete} />;
+  }
+
+  return <LocalBurstCanvas burst={burst} primaryEmoji={primaryEmoji} onComplete={onComplete} />;
+}
+
+type BurstCanvasProps = {
+  burst: EmojiConfettiBurst;
+  primaryEmoji: string;
+  onComplete: (burstId: string) => void;
+};
+
+function FireworkBurstCanvas({ burst, primaryEmoji, onComplete }: BurstCanvasProps) {
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+  const simRef = useRef<FireworkSim | null>(null);
+  const frameRef = useRef<number | null>(null);
+  const lastFrameTimeRef = useRef<number | null>(null);
+  const spawnedRef = useRef(false);
+  const onCompleteRef = useRef(onComplete);
+  onCompleteRef.current = onComplete;
+
+  useEffect(() => {
+    if (!canvasRef.current || spawnedRef.current) return undefined;
+
+    const reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+    if (reducedMotion) {
+      onCompleteRef.current(burst.id);
+      return undefined;
+    }
+
+    const canvas = canvasRef.current;
+    const context = canvas.getContext('2d', { alpha: true });
+    if (!context) {
+      onCompleteRef.current(burst.id);
+      return undefined;
+    }
+    context.imageSmoothingEnabled = false;
+
+    spawnedRef.current = true;
+
+    const resize = () => {
+      const dpr = getFireworkDpr();
+      const width = window.innerWidth;
+      const height = window.innerHeight;
+      canvas.width = Math.round(width * dpr);
+      canvas.height = Math.round(height * dpr);
+      canvas.style.width = `${width}px`;
+      canvas.style.height = `${height}px`;
+      return { width, height, dpr };
+    };
+
+    const { width, height } = resize();
+    const profile = getEmojiBurstProfile(primaryEmoji);
+    const glyph = measureJumboGlyph(burst.targetEventId);
+    const pinToJumbo = Boolean(profile.morphTo && glyph);
+
+    const origin = {
+      x: glyph ? glyph.x : burst.origin.x,
+      y: glyph ? glyph.y : burst.origin.y,
+      maskRadius: glyph ? glyph.size * 0.5 : burst.origin.maskRadius ?? 36,
+    };
+
+    // Keep morph heroes glued to the message emoji; only clamp undirected fireworks.
+    if (!pinToJumbo) {
+      origin.x = Math.min(width - 24, Math.max(24, origin.x));
+      origin.y = Math.min(height - 24, Math.max(24, origin.y));
+    }
+
+    simRef.current = createFireworkSim(
+      width,
+      height,
+      origin,
+      primaryEmoji,
+      profile,
+      performance.now(),
+      glyph?.size
+    );
+
+    const revealJumbo = () => {
+      setJumboEmojiHidden(burst.targetEventId, false);
+    };
+
+    const syncHero = () => {
+      const sim = simRef.current;
+      if (!sim) return;
+      if (!sim.hero) {
+        revealJumbo();
+        return;
+      }
+      const metrics = measureJumboGlyph(burst.targetEventId);
+      syncFireworkHero(sim, metrics);
+      // Re-query every frame so React remounts still stay hidden.
+      setJumboEmojiHidden(burst.targetEventId, true);
+    };
+
+    const onResize = () => {
+      // Extra Things: match CSS size; sim keeps its launch-time world size.
+      resize();
+      syncHero();
+    };
+    window.addEventListener('resize', onResize);
+    window.addEventListener('scroll', syncHero, true);
+
+    const finish = () => {
+      revealJumbo();
+      onCompleteRef.current(burst.id);
+      frameRef.current = null;
+      lastFrameTimeRef.current = null;
+    };
+
+    // Hide immediately before first paint of the stand-in.
+    if (pinToJumbo) {
+      setJumboEmojiHidden(burst.targetEventId, true);
+    }
+
+    const tick = (now: number) => {
+      const sim = simRef.current;
+      if (!sim) return;
+
+      syncHero();
+
+      const last = lastFrameTimeRef.current ?? now;
+      const dtSeconds = Math.min((now - last) / 1000, 0.05);
+      lastFrameTimeRef.current = now;
+
+      const alive = stepFireworkSim(sim, now, dtSeconds);
+      // Hero may have just been dismissed — reveal real jumbo immediately.
+      if (!sim.hero) {
+        revealJumbo();
+      }
+
+      context.setTransform(1, 0, 0, 1, 0, 0);
+      context.clearRect(0, 0, canvas.width, canvas.height);
+
+      if (alive) {
+        drawFireworkSim(context, sim, now);
+        frameRef.current = requestAnimationFrame(tick);
+        return;
+      }
+
+      finish();
+    };
+
+    lastFrameTimeRef.current = performance.now();
+    frameRef.current = requestAnimationFrame(tick);
+
+    return () => {
+      window.removeEventListener('resize', onResize);
+      window.removeEventListener('scroll', syncHero, true);
+      revealJumbo();
+      if (frameRef.current !== null) {
+        cancelAnimationFrame(frameRef.current);
+        frameRef.current = null;
+      }
+      simRef.current = null;
+      // Extra Things: allow Strict Mode remount to start a fresh burst.
+      spawnedRef.current = false;
+    };
+  }, [burst.id, burst.origin.maskRadius, burst.origin.x, burst.origin.y, burst.targetEventId, primaryEmoji]);
+
+  return createPortal(
+    <div
+      aria-hidden
+      style={{
+        position: 'fixed',
+        inset: 0,
+        width: '100vw',
+        height: '100vh',
+        pointerEvents: 'none',
+        zIndex: 40,
+      }}
+    >
+      <canvas
+        ref={canvasRef}
+        style={{
+          position: 'absolute',
+          inset: 0,
+          width: '100%',
+          height: '100%',
+          pointerEvents: 'none',
+        }}
+      />
+    </div>,
+    document.body
+  );
+}
+
+function LocalBurstCanvas({ burst, primaryEmoji, onComplete }: BurstCanvasProps) {
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+  const layerRef = useRef<HTMLDivElement>(null);
+  const particlesRef = useRef<BurstParticle[]>([]);
+  const frameRef = useRef<number | null>(null);
+  const lastFrameTimeRef = useRef<number | null>(null);
+  const spawnedRef = useRef(false);
+  const onCompleteRef = useRef(onComplete);
+  onCompleteRef.current = onComplete;
+
+  const canvasSize = getLocalBurstCanvasSize(burst.origin.maskRadius ?? 36);
+  const localOrigin = useMemo(
+    () => ({
+      x: canvasSize / 2,
+      y: canvasSize / 2,
+      maskRadius: burst.origin.maskRadius ?? 36,
+    }),
+    [burst.origin.maskRadius, canvasSize]
+  );
+
+  const updateLayerPosition = () => {
+    const layer = layerRef.current;
+    if (!layer) return false;
+
+    const jumbo = findJumboEmojiElement(burst.targetEventId);
+    if (!jumbo) return false;
+
+    const rect = jumbo.getBoundingClientRect();
+    layer.style.left = `${rect.left + rect.width / 2 - canvasSize / 2}px`;
+    layer.style.top = `${rect.top + rect.height / 2 - canvasSize / 2}px`;
+    return true;
+  };
+
+  useEffect(() => {
+    const onScrollOrResize = () => {
+      updateLayerPosition();
+    };
+
+    window.addEventListener('scroll', onScrollOrResize, true);
+    window.addEventListener('resize', onScrollOrResize);
+
+    return () => {
+      window.removeEventListener('scroll', onScrollOrResize, true);
+      window.removeEventListener('resize', onScrollOrResize);
+    };
+  }, [burst.targetEventId, canvasSize]);
+
+  useEffect(() => {
+    if (!canvasRef.current || spawnedRef.current) return undefined;
+
+    const reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+    if (reducedMotion) {
+      onCompleteRef.current(burst.id);
+      return undefined;
+    }
+
+    let frameCleanup: (() => void) | undefined;
+
+    const start = (): boolean => {
+      if (spawnedRef.current || !canvasRef.current) return false;
+      if (!updateLayerPosition()) return false;
+
+      spawnedRef.current = true;
+      const canvas = canvasRef.current;
+      const context = canvas.getContext('2d');
+      if (!context) return false;
+
+      const dpr = Math.min(window.devicePixelRatio || 1, MAX_DPR);
+      canvas.width = Math.round(canvasSize * dpr);
+      canvas.height = Math.round(canvasSize * dpr);
+      canvas.style.width = `${canvasSize}px`;
+      canvas.style.height = `${canvasSize}px`;
+
+      spawnEmojiBurst(particlesRef.current, burst.id, localOrigin, primaryEmoji, performance.now());
+
+      const tick = (now: number) => {
+        updateLayerPosition();
+
+        const last = lastFrameTimeRef.current ?? now;
+        const dtSeconds = Math.min((now - last) / 1000, 0.05);
+        lastFrameTimeRef.current = now;
+
+        stepBurstParticles(particlesRef.current, now, dtSeconds);
+
+        context.setTransform(1, 0, 0, 1, 0, 0);
+        context.clearRect(0, 0, canvas.width, canvas.height);
+
+        if (particlesRef.current.length > 0) {
+          drawBurstParticles(context, particlesRef.current, dpr, now);
+          frameRef.current = requestAnimationFrame(tick);
+          return;
+        }
+
+        onCompleteRef.current(burst.id);
+        frameRef.current = null;
+        lastFrameTimeRef.current = null;
+      };
+
+      lastFrameTimeRef.current = performance.now();
+      frameRef.current = requestAnimationFrame(tick);
+
+      frameCleanup = () => {
+        if (frameRef.current !== null) {
+          cancelAnimationFrame(frameRef.current);
+          frameRef.current = null;
+        }
+      };
+
+      return true;
+    };
+
+    if (start()) {
+      return frameCleanup;
+    }
+
+    let attempt = 0;
+    const retry = window.setInterval(() => {
+      attempt += 1;
+      if (start() || attempt >= 10) {
+        window.clearInterval(retry);
+        if (attempt >= 10 && !spawnedRef.current) {
+          onCompleteRef.current(burst.id);
+        }
+      }
+    }, 50);
+
+    return () => {
+      window.clearInterval(retry);
+      frameCleanup?.();
+    };
+  }, [burst.id, burst.targetEventId, canvasSize, localOrigin, primaryEmoji]);
+
+  return createPortal(
+    <div
+      ref={layerRef}
+      aria-hidden
+      style={{
+        position: 'fixed',
+        width: canvasSize,
+        height: canvasSize,
+        pointerEvents: 'none',
+        zIndex: 4,
+      }}
+    >
+      <canvas
+        ref={canvasRef}
+        style={{
+          position: 'absolute',
+          inset: 0,
+          pointerEvents: 'none',
+        }}
+      />
+    </div>,
+    document.body
+  );
+}

src/app/features/room/emoji-confetti/EmojiConfettiOverlay.tsx

@@ -0,0 +1,24 @@
+import React from 'react';
+import { EmojiConfettiBurst } from './types';
+import { EmojiConfettiBurstCanvas } from './EmojiConfettiBurstCanvas';
+
+type EmojiConfettiOverlayProps = {
+  bursts: EmojiConfettiBurst[];
+  onBurstComplete: (burstId: string) => void;
+};
+
+export function EmojiConfettiOverlay({ bursts, onBurstComplete }: EmojiConfettiOverlayProps) {
+  if (bursts.length === 0) return null;
+
+  return (
+    <>
+      {bursts.map((burst) => (
+        <EmojiConfettiBurstCanvas
+          key={burst.id}
+          burst={burst}
+          onComplete={onBurstComplete}
+        />
+      ))}
+    </>
+  );
+}

src/app/features/room/emoji-confetti/burstOrigin.ts

@@ -0,0 +1,74 @@
+export type BurstPoint = {
+  x: number;
+  y: number;
+  maskRadius?: number;
+};
+
+export function getBurstPointFromElement(element: Element): BurstPoint {
+  const rect = element.getBoundingClientRect();
+  return {
+    x: rect.left + rect.width / 2,
+    y: rect.top + rect.height / 2,
+    maskRadius: Math.max(rect.width, rect.height) * 0.5,
+  };
+}
+
+export function getElementCenter(element: Element): BurstPoint {
+  return getBurstPointFromElement(element);
+}
+
+export function findEmojiOriginInMessage(
+  targetEventId: string,
+  emoji: string
+): BurstPoint | undefined {
+  const message = document.querySelector(`[data-message-id="${CSS.escape(targetEventId)}"]`);
+  if (!message) return undefined;
+
+  const matches = message.querySelectorAll('[data-emoticon]');
+  for (const element of matches) {
+    if (element.getAttribute('data-emoticon') === emoji) {
+      return getBurstPointFromElement(element);
+    }
+  }
+
+  return undefined;
+}
+
+export function getMessageFallbackOrigin(targetEventId: string): BurstPoint | undefined {
+  const message = document.querySelector(`[data-message-id="${CSS.escape(targetEventId)}"]`);
+  if (!message) return undefined;
+
+  const jumboBody = message.querySelector('[data-jumbo-emoji]');
+  if (jumboBody) {
+    return getBurstPointFromElement(jumboBody);
+  }
+
+  const body = message.querySelector('[data-message-body]');
+  if (body) {
+    return getBurstPointFromElement(body);
+  }
+
+  return getBurstPointFromElement(message);
+}
+
+export function resolveBurstOrigin(
+  targetEventId: string | undefined,
+  emojis: string[],
+  explicitOrigin?: BurstPoint
+): BurstPoint {
+  if (explicitOrigin) return explicitOrigin;
+
+  const primaryEmoji = emojis[0];
+  if (targetEventId && primaryEmoji) {
+    const emojiOrigin = findEmojiOriginInMessage(targetEventId, primaryEmoji);
+    if (emojiOrigin) return emojiOrigin;
+
+    const messageOrigin = getMessageFallbackOrigin(targetEventId);
+    if (messageOrigin) return messageOrigin;
+  }
+
+  return {
+    x: window.innerWidth / 2,
+    y: window.innerHeight * 0.35,
+  };
+}

src/app/features/room/emoji-confetti/emojiBurstEngine.ts

@@ -0,0 +1,357 @@
+import { BurstPoint } from './burstOrigin';
+import {
+  BurstMotionStyle,
+  EmojiBurstProfile,
+  getEmojiBurstProfile,
+  pickParticleEmoji,
+  sampleBurstAngle,
+} from './emojiParticleProfiles';
+
+/** Particles spawn over this window. */
+export const BURST_SPAWN_MS = 500;
+/** Global fade runs from 0.5s → 2s after burst start. */
+export const BURST_FADE_START_MS = 500;
+export const BURST_FADE_END_MS = 2000;
+export const BURST_TOTAL_MS = BURST_FADE_END_MS;
+
+export type BurstParticle = {
+  burstId: string;
+  burstStartMs: number;
+  emoji: string;
+  fontSize: number;
+  spawnX: number;
+  spawnY: number;
+  maskRadius: number;
+  x: number;
+  y: number;
+  vx: number;
+  vy: number;
+  bornAt: number;
+  rotation: number;
+  spin: number;
+  peakScale: number;
+  style: BurstMotionStyle;
+  gravity: number;
+  drag: number;
+  phase: number;
+  twinkle?: boolean;
+  wobble?: boolean;
+  orbitRadius: number;
+  orbitSpeed: number;
+  orbitAngle: number;
+  bounceDamping: number;
+  bouncesLeft: number;
+};
+
+const EMOJI_CACHE_PX = 64;
+const EMOJI_CACHE_SCALE = 2;
+const MAX_DPR = 2;
+const POP_IN_MS = 70;
+
+const emojiCanvasCache = new Map<string, HTMLCanvasElement>();
+
+function easeOutBack(t: number): number {
+  const c1 = 1.70158;
+  const c3 = c1 + 1;
+  return 1 + c3 * (t - 1) ** 3 + c1 * (t - 1) ** 2;
+}
+
+function easeOutCubic(t: number): number {
+  return 1 - (1 - t) ** 3;
+}
+
+function lerp(min: number, max: number): number {
+  return min + Math.random() * (max - min);
+}
+
+function getEmojiCanvas(emoji: string): HTMLCanvasElement {
+  const dpr = Math.min(window.devicePixelRatio || 1, MAX_DPR);
+  const cacheKey = `${emoji}:${dpr}`;
+  const cached = emojiCanvasCache.get(cacheKey);
+  if (cached) return cached;
+
+  const fontSize = Math.ceil(EMOJI_CACHE_PX * dpr);
+  const size = Math.ceil(fontSize * EMOJI_CACHE_SCALE);
+  const canvas = document.createElement('canvas');
+  canvas.width = size;
+  canvas.height = size;
+
+  const context = canvas.getContext('2d');
+  if (context) {
+    context.textAlign = 'center';
+    context.textBaseline = 'middle';
+    context.font = `${fontSize}px "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif`;
+    context.fillText(emoji, size / 2, size / 2);
+  }
+
+  emojiCanvasCache.set(cacheKey, canvas);
+  return canvas;
+}
+
+function emergeOpacity(
+  x: number,
+  y: number,
+  spawnX: number,
+  spawnY: number,
+  maskRadius: number
+): number {
+  const dist = Math.hypot(x - spawnX, y - spawnY);
+  const inner = maskRadius * 0.55;
+  const outer = maskRadius * 1.05;
+  if (dist <= inner) return 0;
+  if (dist >= outer) return 1;
+  return (dist - inner) / (outer - inner);
+}
+
+function spawnParticle(
+  particles: BurstParticle[],
+  burstId: string,
+  burstStartMs: number,
+  point: BurstPoint,
+  primaryEmoji: string,
+  profile: EmojiBurstProfile,
+  bornAt: number,
+  options?: { hero?: boolean }
+) {
+  const hero = options?.hero ?? false;
+  const angle = sampleBurstAngle(profile);
+  const speed = hero
+    ? lerp(profile.speedMin * 0.65, profile.speedMax * 0.55)
+    : lerp(profile.speedMin, profile.speedMax);
+  const launchUp = lerp(profile.launchUpMin, profile.launchUpMax);
+  const maskRadius = point.maskRadius ?? 28;
+  const jitter = hero ? 3 : 12;
+  const emoji = pickParticleEmoji(profile, primaryEmoji);
+
+  let vx = Math.cos(angle) * speed + (Math.random() - 0.5) * 60;
+  let vy = Math.sin(angle) * speed - launchUp;
+
+  if (profile.style === 'spiral') {
+    vx *= 0.35;
+    vy *= 0.35;
+  }
+
+  if (profile.style === 'sparkle') {
+    vx *= 0.75;
+    vy *= 0.75;
+  }
+
+  particles.push({
+    burstId,
+    burstStartMs,
+    emoji,
+    fontSize: hero
+      ? lerp(profile.heroFontSizeMin, profile.heroFontSizeMax)
+      : lerp(profile.fontSizeMin, profile.fontSizeMax),
+    spawnX: point.x,
+    spawnY: point.y,
+    maskRadius,
+    x: point.x + (Math.random() - 0.5) * jitter,
+    y: point.y + (Math.random() - 0.5) * jitter,
+    vx,
+    vy,
+    bornAt,
+    rotation: (Math.random() - 0.5) * 40,
+    spin: lerp(profile.spinMin, profile.spinMax),
+    peakScale: hero ? 1.1 + Math.random() * 0.2 : 0.9 + Math.random() * 0.4,
+    style: profile.style,
+    gravity: profile.gravity,
+    drag: profile.drag,
+    phase: Math.random() * Math.PI * 2,
+    twinkle: profile.twinkle,
+    wobble: profile.wobble,
+    orbitRadius: hero ? 8 : 14 + Math.random() * 28,
+    orbitSpeed: (Math.random() < 0.5 ? -1 : 1) * (1.8 + Math.random() * 2.4),
+    orbitAngle: Math.random() * Math.PI * 2,
+    bounceDamping: 0.42 + Math.random() * 0.18,
+    bouncesLeft: profile.style === 'bounce' ? 2 : 0,
+  });
+}
+
+/** Fountain from behind the emoji for 0.5s, fade 0.5s→2s. */
+export function spawnEmojiBurst(
+  particles: BurstParticle[],
+  burstId: string,
+  point: BurstPoint,
+  emoji: string,
+  now = performance.now()
+) {
+  const profile = getEmojiBurstProfile(emoji);
+  const burstStartMs = now;
+
+  spawnParticle(particles, burstId, burstStartMs, point, emoji, profile, burstStartMs, {
+    hero: true,
+  });
+
+  const particleCount = profile.particleCount;
+  for (let i = 0; i < particleCount; i += 1) {
+    const slot = i / particleCount;
+    const bornAt =
+      burstStartMs + slot * BURST_SPAWN_MS + Math.random() * (BURST_SPAWN_MS / particleCount);
+    spawnParticle(particles, burstId, burstStartMs, point, emoji, profile, bornAt);
+  }
+}
+
+function stepSpiralParticle(particle: BurstParticle, dtSeconds: number) {
+  particle.orbitRadius += 42 * dtSeconds;
+  particle.orbitAngle += particle.orbitSpeed * dtSeconds;
+  particle.x = particle.spawnX + Math.cos(particle.orbitAngle) * particle.orbitRadius;
+  particle.y =
+    particle.spawnY + Math.sin(particle.orbitAngle) * particle.orbitRadius * 0.65 + particle.vy * dtSeconds * 8;
+  particle.vy += particle.gravity * dtSeconds * 0.35;
+  particle.rotation += particle.spin * dtSeconds;
+}
+
+function stepBounceParticle(particle: BurstParticle, dtSeconds: number, dragFactor: number) {
+  particle.vy += particle.gravity * dtSeconds;
+  particle.vx *= dragFactor;
+  particle.vy *= dragFactor;
+  particle.x += particle.vx * dtSeconds;
+  particle.y += particle.vy * dtSeconds;
+  particle.rotation += particle.spin * dtSeconds;
+
+  if (particle.bouncesLeft > 0 && particle.vy > 0 && particle.y >= particle.spawnY + 6) {
+    particle.y = particle.spawnY + 6;
+    particle.vy = -Math.abs(particle.vy) * particle.bounceDamping;
+    particle.vx *= 0.82;
+    particle.bouncesLeft -= 1;
+    particle.spin += (Math.random() - 0.5) * 120;
+  }
+}
+
+function stepDefaultParticle(particle: BurstParticle, dtSeconds: number, dragFactor: number) {
+  particle.vy += particle.gravity * dtSeconds;
+  particle.vx *= dragFactor;
+  particle.vy *= dragFactor;
+  particle.x += particle.vx * dtSeconds;
+  particle.y += particle.vy * dtSeconds;
+  particle.rotation += particle.spin * dtSeconds;
+}
+
+export function stepBurstParticles(
+  particles: BurstParticle[],
+  now: number,
+  dtSeconds: number
+): void {
+  for (let i = particles.length - 1; i >= 0; i -= 1) {
+    const particle = particles[i];
+    const burstElapsed = now - particle.burstStartMs;
+
+    if (burstElapsed > BURST_TOTAL_MS) {
+      particles[i] = particles[particles.length - 1];
+      particles.pop();
+      continue;
+    }
+
+    const ageMs = now - particle.bornAt;
+    if (ageMs < 0) continue;
+
+    const dragFactor = particle.drag ** (dtSeconds * 60);
+
+    switch (particle.style) {
+      case 'spiral':
+        stepSpiralParticle(particle, dtSeconds);
+        break;
+      case 'bounce':
+        stepBounceParticle(particle, dtSeconds, dragFactor);
+        break;
+      default:
+        stepDefaultParticle(particle, dtSeconds, dragFactor);
+        break;
+    }
+
+    particle.phase += dtSeconds * (particle.twinkle ? 9 : 5);
+  }
+}
+
+type DrawState = {
+  x: number;
+  y: number;
+  scale: number;
+  opacity: number;
+  rotation: number;
+};
+
+function particleDrawState(particle: BurstParticle, now: number): DrawState | null {
+  const burstElapsed = now - particle.burstStartMs;
+  if (burstElapsed > BURST_TOTAL_MS) return null;
+
+  const ageMs = now - particle.bornAt;
+  if (ageMs < 0) return null;
+
+  let scale = particle.peakScale;
+  let opacity = emergeOpacity(
+    particle.x,
+    particle.y,
+    particle.spawnX,
+    particle.spawnY,
+    particle.maskRadius
+  );
+
+  if (opacity <= 0) return null;
+
+  if (ageMs < POP_IN_MS) {
+    const pop = easeOutBack(ageMs / POP_IN_MS);
+    scale = 0.1 + pop * particle.peakScale;
+    opacity *= pop;
+  }
+
+  if (particle.twinkle) {
+    opacity *= 0.55 + 0.45 * Math.sin(particle.phase * 1.6);
+  }
+
+  if (particle.wobble) {
+    scale *= 1 + 0.12 * Math.sin(particle.phase * 2.2);
+  }
+
+  if (particle.style === 'sparkle' && burstElapsed < BURST_FADE_START_MS) {
+    scale *= 0.85 + 0.3 * Math.sin(particle.phase * 3);
+  }
+
+  if (burstElapsed >= BURST_FADE_START_MS) {
+    const fadeT = (burstElapsed - BURST_FADE_START_MS) / (BURST_FADE_END_MS - BURST_FADE_START_MS);
+    opacity *= 1 - easeOutCubic(Math.min(1, fadeT));
+    scale *= 1 - easeOutCubic(Math.min(1, fadeT)) * 0.2;
+  }
+
+  if (opacity <= 0.02) return null;
+
+  return {
+    x: particle.x,
+    y: particle.y,
+    scale,
+    opacity,
+    rotation: particle.rotation,
+  };
+}
+
+export function drawBurstParticles(
+  context: CanvasRenderingContext2D,
+  particles: BurstParticle[],
+  dpr: number,
+  now: number
+) {
+  for (const particle of particles) {
+    const state = particleDrawState(particle, now);
+    if (!state) continue;
+
+    context.globalAlpha = state.opacity;
+
+    const emojiCanvas = getEmojiCanvas(particle.emoji);
+    const drawSize = particle.fontSize * state.scale * EMOJI_CACHE_SCALE;
+    const halfSize = drawSize / 2;
+    const radians = (state.rotation * Math.PI) / 180;
+    const cos = Math.cos(radians) * dpr;
+    const sin = Math.sin(radians) * dpr;
+
+    context.setTransform(cos, sin, -sin, cos, state.x * dpr, state.y * dpr);
+    context.drawImage(emojiCanvas, -halfSize, -halfSize, drawSize, drawSize);
+  }
+
+  context.globalAlpha = 1;
+  context.setTransform(dpr, 0, 0, dpr, 0, 0);
+}
+
+export function hasBurstParticles(particles: BurstParticle[], burstId: string): boolean {
+  return particles.some((particle) => particle.burstId === burstId);
+}

src/app/features/room/emoji-confetti/emojiParticleProfiles.ts

@@ -0,0 +1,500 @@
+export type BurstMotionStyle =
+  | 'explode'
+  | 'bounce'
+  | 'rise'
+  | 'sparkle'
+  | 'splash'
+  | 'spiral'
+  | 'punch'
+  | 'scatter'
+  | 'shower'
+  | 'firework';
+
+export type EmojiBurstProfile = {
+  style: BurstMotionStyle;
+  particleCount: number;
+  gravity: number;
+  drag: number;
+  speedMin: number;
+  speedMax: number;
+  launchUpMin: number;
+  launchUpMax: number;
+  spinMin: number;
+  spinMax: number;
+  fontSizeMin: number;
+  fontSizeMax: number;
+  heroFontSizeMin: number;
+  heroFontSizeMax: number;
+  companions?: string[];
+  companionChance?: number;
+  /** Bias burst angle in radians. 0 = right, -π/2 = up. */
+  angleBias?: number;
+  /** Limit spawn to a cone (radians). Omit for full 360°. */
+  angleSpread?: number;
+  twinkle?: boolean;
+  wobble?: boolean;
+  /** Full-viewport overlay (Box2D pile for fireworks). */
+  fullscreen?: boolean;
+  /** Soft color wash applied to matching particle glyphs (e.g. green spit). */
+  tintColor?: string;
+  /** Emojis that receive `tintColor` when drawn. */
+  tintEmojis?: string[];
+  /** Swap the primary face to this emoji mid-burst (e.g. 🤢 → 🤮). */
+  morphTo?: string;
+  /** Delay before `morphTo` kicks in. */
+  morphAfterMs?: number;
+  /** How long the stand-in hero face stays before the real jumbo returns.
+   * Omit to keep it up until the last particle spawns. */
+  heroDurationMs?: number;
+};
+
+const DEFAULT_PROFILE: EmojiBurstProfile = {
+  style: 'explode',
+  particleCount: 36,
+  gravity: 400,
+  drag: 0.935,
+  speedMin: 240,
+  speedMax: 560,
+  launchUpMin: 40,
+  launchUpMax: 130,
+  spinMin: -180,
+  spinMax: 180,
+  fontSizeMin: 14,
+  fontSizeMax: 26,
+  heroFontSizeMin: 26,
+  heroFontSizeMax: 34,
+};
+
+const PROFILE_OVERRIDES: Record<string, Partial<EmojiBurstProfile>> = {
+  '😆': {
+    style: 'bounce',
+    particleCount: 28,
+    gravity: 520,
+    speedMin: 180,
+    speedMax: 360,
+    launchUpMin: 120,
+    launchUpMax: 220,
+    spinMin: -240,
+    spinMax: 240,
+    wobble: true,
+  },
+  '😂': {
+    style: 'bounce',
+    particleCount: 30,
+    gravity: 500,
+    speedMin: 160,
+    speedMax: 340,
+    launchUpMin: 110,
+    launchUpMax: 210,
+    spinMin: -220,
+    spinMax: 220,
+    wobble: true,
+  },
+  '🤣': {
+    style: 'bounce',
+    particleCount: 32,
+    gravity: 480,
+    speedMin: 200,
+    speedMax: 380,
+    launchUpMin: 130,
+    launchUpMax: 240,
+    wobble: true,
+  },
+  '🔥': {
+    style: 'rise',
+    particleCount: 24,
+    gravity: -120,
+    drag: 0.96,
+    speedMin: 80,
+    speedMax: 200,
+    launchUpMin: 60,
+    launchUpMax: 160,
+    spinMin: -90,
+    spinMax: 90,
+    fontSizeMin: 16,
+    fontSizeMax: 28,
+    twinkle: true,
+    wobble: true,
+    companions: ['✨'],
+    companionChance: 0.35,
+  },
+  '❤️': {
+    style: 'rise',
+    particleCount: 22,
+    gravity: -80,
+    drag: 0.97,
+    speedMin: 60,
+    speedMax: 150,
+    launchUpMin: 40,
+    launchUpMax: 110,
+    spinMin: -40,
+    spinMax: 40,
+    fontSizeMin: 14,
+    fontSizeMax: 24,
+    companions: ['💕', '💖'],
+    companionChance: 0.4,
+  },
+  '💕': {
+    style: 'rise',
+    particleCount: 20,
+    gravity: -70,
+    drag: 0.97,
+    speedMin: 50,
+    speedMax: 140,
+    launchUpMin: 35,
+    launchUpMax: 100,
+    spinMin: -35,
+    spinMax: 35,
+  },
+  '💖': {
+    style: 'rise',
+    particleCount: 20,
+    gravity: -90,
+    drag: 0.968,
+    speedMin: 55,
+    speedMax: 150,
+    launchUpMin: 45,
+    launchUpMax: 115,
+    twinkle: true,
+  },
+  '⭐': {
+    style: 'sparkle',
+    particleCount: 26,
+    gravity: 40,
+    drag: 0.94,
+    speedMin: 100,
+    speedMax: 260,
+    launchUpMin: 20,
+    launchUpMax: 80,
+    spinMin: -120,
+    spinMax: 120,
+    twinkle: true,
+    companions: ['✨'],
+    companionChance: 0.5,
+  },
+  '✨': {
+    style: 'sparkle',
+    particleCount: 30,
+    gravity: 30,
+    drag: 0.945,
+    speedMin: 90,
+    speedMax: 240,
+    launchUpMin: 15,
+    launchUpMax: 70,
+    spinMin: -200,
+    spinMax: 200,
+    twinkle: true,
+  },
+  '💀': {
+    style: 'scatter',
+    particleCount: 20,
+    gravity: 620,
+    drag: 0.92,
+    speedMin: 200,
+    speedMax: 420,
+    launchUpMin: 20,
+    launchUpMax: 90,
+    spinMin: -360,
+    spinMax: 360,
+    fontSizeMin: 16,
+    fontSizeMax: 28,
+  },
+  '🎉': {
+    style: 'shower',
+    particleCount: 40,
+    gravity: 280,
+    drag: 0.93,
+    speedMin: 200,
+    speedMax: 480,
+    launchUpMin: 80,
+    launchUpMax: 200,
+    companions: ['🎊', '✨', '🎈'],
+    companionChance: 0.45,
+  },
+  '🎊': {
+    style: 'shower',
+    particleCount: 38,
+    gravity: 260,
+    drag: 0.932,
+    speedMin: 190,
+    speedMax: 460,
+    launchUpMin: 70,
+    launchUpMax: 190,
+    companions: ['🎉', '✨'],
+    companionChance: 0.4,
+  },
+  '👏': {
+    style: 'punch',
+    particleCount: 18,
+    gravity: 320,
+    speedMin: 220,
+    speedMax: 400,
+    launchUpMin: 30,
+    launchUpMax: 100,
+    angleBias: -Math.PI / 2,
+    angleSpread: Math.PI * 0.85,
+    spinMin: -100,
+    spinMax: 100,
+  },
+  '👍': {
+    style: 'punch',
+    particleCount: 14,
+    gravity: 380,
+    speedMin: 260,
+    speedMax: 440,
+    launchUpMin: 100,
+    launchUpMax: 200,
+    angleBias: -Math.PI / 2,
+    angleSpread: Math.PI * 0.55,
+    spinMin: -60,
+    spinMax: 60,
+  },
+  '💯': {
+    style: 'punch',
+    particleCount: 16,
+    gravity: 300,
+    speedMin: 200,
+    speedMax: 380,
+    launchUpMin: 140,
+    launchUpMax: 240,
+    angleBias: -Math.PI / 2,
+    angleSpread: Math.PI * 0.45,
+    fontSizeMin: 16,
+    fontSizeMax: 30,
+    wobble: true,
+  },
+  '💦': {
+    style: 'splash',
+    particleCount: 32,
+    gravity: 540,
+    drag: 0.925,
+    speedMin: 280,
+    speedMax: 520,
+    launchUpMin: 160,
+    launchUpMax: 300,
+    spinMin: -140,
+    spinMax: 140,
+    angleBias: -Math.PI / 2,
+    angleSpread: Math.PI * 1.1,
+  },
+  '🌊': {
+    style: 'splash',
+    particleCount: 28,
+    gravity: 420,
+    drag: 0.93,
+    speedMin: 220,
+    speedMax: 460,
+    launchUpMin: 100,
+    launchUpMax: 220,
+    angleBias: -Math.PI / 2,
+    angleSpread: Math.PI,
+    companions: ['💧'],
+    companionChance: 0.3,
+  },
+  '⚡': {
+    style: 'scatter',
+    particleCount: 14,
+    gravity: 180,
+    drag: 0.88,
+    speedMin: 380,
+    speedMax: 680,
+    launchUpMin: 10,
+    launchUpMax: 60,
+    spinMin: -30,
+    spinMax: 30,
+    fontSizeMin: 18,
+    fontSizeMax: 32,
+    angleSpread: Math.PI * 1.2,
+  },
+  '🌀': {
+    style: 'spiral',
+    particleCount: 24,
+    gravity: 60,
+    drag: 0.96,
+    speedMin: 120,
+    speedMax: 260,
+    launchUpMin: 0,
+    launchUpMax: 40,
+    spinMin: -420,
+    spinMax: 420,
+  },
+  '🤯': {
+    style: 'explode',
+    particleCount: 34,
+    gravity: 360,
+    speedMin: 280,
+    speedMax: 580,
+    launchUpMin: 60,
+    launchUpMax: 160,
+    companions: ['💥', '✨', '⭐'],
+    companionChance: 0.5,
+  },
+  '😭': {
+    style: 'splash',
+    particleCount: 26,
+    gravity: 480,
+    drag: 0.94,
+    speedMin: 140,
+    speedMax: 300,
+    launchUpMin: 40,
+    launchUpMax: 120,
+    angleBias: Math.PI / 2,
+    angleSpread: Math.PI * 0.7,
+    companions: ['💧'],
+    companionChance: 0.55,
+  },
+  '🥳': {
+    style: 'shower',
+    particleCount: 36,
+    gravity: 250,
+    speedMin: 180,
+    speedMax: 440,
+    launchUpMin: 90,
+    launchUpMax: 210,
+    companions: ['🎉', '🎊', '🎈'],
+    companionChance: 0.4,
+  },
+  '🎆': {
+    style: 'firework',
+    fullscreen: true,
+    particleCount: 320,
+    gravity: 980,
+    drag: 1,
+    speedMin: 420,
+    speedMax: 980,
+    launchUpMin: 180,
+    launchUpMax: 420,
+    spinMin: -520,
+    spinMax: 520,
+    fontSizeMin: 16,
+    fontSizeMax: 30,
+    heroFontSizeMin: 40,
+    heroFontSizeMax: 52,
+    companions: ['🎇', '✨', '💥', '⭐', '🎉'],
+    companionChance: 0.55,
+  },
+  '🎇': {
+    style: 'firework',
+    fullscreen: true,
+    particleCount: 280,
+    gravity: 960,
+    drag: 1,
+    speedMin: 380,
+    speedMax: 920,
+    launchUpMin: 160,
+    launchUpMax: 400,
+    spinMin: -480,
+    spinMax: 480,
+    fontSizeMin: 14,
+    fontSizeMax: 28,
+    heroFontSizeMin: 36,
+    heroFontSizeMax: 48,
+    companions: ['🎆', '✨', '⭐', '💥'],
+    companionChance: 0.5,
+    twinkle: true,
+  },
+  // Full-viewport spew — downward cone, green-tinted droplets, piles on the floor.
+  '🤢': {
+    style: 'firework',
+    fullscreen: true,
+    particleCount: 420,
+    gravity: 1200,
+    drag: 1,
+    speedMin: 380,
+    speedMax: 980,
+    launchUpMin: 0,
+    launchUpMax: 40,
+    spinMin: -560,
+    spinMax: 560,
+    fontSizeMin: 18,
+    fontSizeMax: 34,
+    heroFontSizeMin: 44,
+    heroFontSizeMax: 58,
+    // Downward throw-up cone (π/2 = down in canvas space).
+    angleBias: Math.PI / 2,
+    angleSpread: Math.PI * 1.05,
+    companions: ['💦', '💧', '💚'],
+    companionChance: 1,
+    tintColor: 'rgba(72, 190, 48, 0.72)',
+    tintEmojis: ['💦', '💧'],
+    morphTo: '🤮',
+    morphAfterMs: 220,
+    wobble: true,
+  },
+  '🤮': {
+    style: 'firework',
+    fullscreen: true,
+    particleCount: 460,
+    gravity: 1250,
+    drag: 1,
+    speedMin: 420,
+    speedMax: 1050,
+    launchUpMin: 0,
+    launchUpMax: 30,
+    spinMin: -600,
+    spinMax: 600,
+    fontSizeMin: 18,
+    fontSizeMax: 36,
+    heroFontSizeMin: 46,
+    heroFontSizeMax: 60,
+    angleBias: Math.PI / 2,
+    angleSpread: Math.PI * 1.15,
+    companions: ['💦', '💧', '💚'],
+    companionChance: 1,
+    tintColor: 'rgba(72, 190, 48, 0.72)',
+    tintEmojis: ['💦', '💧'],
+    wobble: true,
+  },
+  '🐱': {
+    style: 'bounce',
+    particleCount: 20,
+    gravity: 440,
+    speedMin: 150,
+    speedMax: 320,
+    launchUpMin: 90,
+    launchUpMax: 180,
+    spinMin: -160,
+    spinMax: 160,
+  },
+  '🐶': {
+    style: 'bounce',
+    particleCount: 20,
+    gravity: 460,
+    speedMin: 160,
+    speedMax: 330,
+    launchUpMin: 85,
+    launchUpMax: 175,
+    wobble: true,
+  },
+};
+
+export function getEmojiBurstProfile(emoji: string): EmojiBurstProfile {
+  const override = PROFILE_OVERRIDES[emoji];
+  if (!override) return DEFAULT_PROFILE;
+  return { ...DEFAULT_PROFILE, ...override };
+}
+
+export function isFullscreenBurstEmoji(emoji: string): boolean {
+  return getEmojiBurstProfile(emoji).fullscreen === true;
+}
+
+export function pickParticleEmoji(profile: EmojiBurstProfile, primaryEmoji: string): string {
+  if (!profile.companions?.length || !profile.companionChance) {
+    return primaryEmoji;
+  }
+  if (Math.random() >= profile.companionChance) {
+    return primaryEmoji;
+  }
+  const companion = profile.companions[Math.floor(Math.random() * profile.companions.length)];
+  return companion ?? primaryEmoji;
+}
+
+export function sampleBurstAngle(profile: EmojiBurstProfile): number {
+  if (profile.angleSpread === undefined) {
+    return Math.random() * Math.PI * 2;
+  }
+
+  const bias = profile.angleBias ?? -Math.PI / 2;
+  const halfSpread = profile.angleSpread / 2;
+  return bias + (Math.random() - 0.5) * profile.angleSpread * (0.6 + Math.random() * 0.4);
+}

src/app/features/room/emoji-confetti/findJumboMount.ts

@@ -0,0 +1,65 @@
+export function findJumboEmojiElement(targetEventId: string): HTMLElement | null {
+  const message = document.querySelector(`[data-message-id="${CSS.escape(targetEventId)}"]`);
+  if (!message) return null;
+
+  const jumbo = message.querySelector('[data-jumbo-emoji]');
+  return jumbo instanceof HTMLElement ? jumbo : null;
+}
+
+export type JumboGlyphMetrics = {
+  /** Outer jumbo mount (message body) — hide/show this. */
+  mount: HTMLElement;
+  /** Visual glyph center in viewport coords. */
+  x: number;
+  y: number;
+  /** CSS px size matching the rendered emoji (usually computed font-size). */
+  size: number;
+};
+
+/**
+ * Measure the on-screen jumbo glyph. Prefer computed font-size so the canvas
+ * stand-in matches unicode emoji; fall back to the glyph box for images.
+ */
+export function measureJumboGlyph(targetEventId: string): JumboGlyphMetrics | null {
+  const mount = findJumboEmojiElement(targetEventId);
+  if (!mount) return null;
+
+  const glyph =
+    (mount.querySelector('[data-emoticon]') as HTMLElement | null) ||
+    (mount.querySelector('img') as HTMLElement | null) ||
+    mount;
+
+  const rect = glyph.getBoundingClientRect();
+  const fontSize =
+    parseFloat(getComputedStyle(glyph).fontSize) ||
+    parseFloat(getComputedStyle(mount).fontSize) ||
+    0;
+
+  const isImg = glyph instanceof HTMLImageElement || glyph.tagName === 'IMG';
+  const size = isImg
+    ? Math.max(rect.width, rect.height)
+    : fontSize > 0
+      ? fontSize
+      : Math.max(rect.width, rect.height);
+
+  return {
+    mount,
+    x: rect.left + rect.width / 2,
+    y: rect.top + rect.height / 2,
+    size,
+  };
+}
+
+export function setJumboEmojiHidden(targetEventId: string, hidden: boolean) {
+  const mount = findJumboEmojiElement(targetEventId);
+  if (!mount) return;
+  if (hidden) {
+    mount.style.visibility = 'hidden';
+  } else {
+    mount.style.removeProperty('visibility');
+  }
+}
+
+export function getLocalBurstCanvasSize(maskRadius: number): number {
+  return Math.max(300, Math.round(maskRadius * 6.5));
+}

src/app/features/room/emoji-confetti/fireworkParticleEngine.ts

@@ -0,0 +1,515 @@
+/**
+ * Old-school fullscreen firework fountain — no physics engine.
+ * Position/velocity arrays, gravity, floor bounce, settle into a pile.
+ * Same vibe as late-90s/MSN page effects, just with emoji.
+ */
+import { BurstPoint } from './burstOrigin';
+import {
+  pickParticleEmoji,
+  sampleBurstAngle,
+  type EmojiBurstProfile,
+} from './emojiParticleProfiles';
+
+const EMOJI_CACHE_PX = 40;
+const EMOJI_CACHE_SCALE = 2;
+
+const SPAWN_WINDOW_MS = 2200;
+const SETTLE_HOLD_MS = 7800;
+const FADE_MS = 800;
+export const FIREWORK_TOTAL_MS = SETTLE_HOLD_MS + FADE_MS;
+
+const SPARKLE_IN_MS = 120;
+const MAX_SPAWNS_PER_FRAME = 6;
+const FLOOR_PAD = 8;
+const BOUNCE = 0.38;
+const DRAG = 0.992;
+const SETTLE_SPEED = 55;
+const PILE_CELL = 22;
+
+type SpawnItem = {
+  atMs: number;
+  emoji: string;
+  fontSize: number;
+};
+
+export type FireworkParticle = {
+  x: number;
+  y: number;
+  vx: number;
+  vy: number;
+  spin: number;
+  angle: number;
+  emoji: string;
+  emojiCanvas: HTMLCanvasElement;
+  drawSize: number;
+  halfSize: number;
+  bornAt: number;
+  settled: boolean;
+};
+
+type HeroFace = {
+  emoji: string;
+  emojiCanvas: HTMLCanvasElement;
+  /** Target CSS pixel size of the glyph (matches jumbo font-size). */
+  drawSize: number;
+  halfSize: number;
+  /** canvasPx / fontPx — draw box is drawSize * canvasScale so the glyph isn't cropped. */
+  canvasScale: number;
+  morphed: boolean;
+};
+
+export type FireworkSim = {
+  particles: FireworkParticle[];
+  profile: EmojiBurstProfile;
+  primaryEmoji: string;
+  morphAtMs: number | null;
+  /** When to drop the stand-in hero and reveal the real jumbo again. */
+  heroUntilMs: number | null;
+  hero: HeroFace | null;
+  width: number;
+  height: number;
+  origin: BurstPoint;
+  startMs: number;
+  spawnPlan: SpawnItem[];
+  spawnCursor: number;
+  floorY: number;
+  /** Column stack heights for the settled pile (in cells). */
+  pileCols: Uint16Array;
+  pileCanvas: HTMLCanvasElement | null;
+  pileCtx: CanvasRenderingContext2D | null;
+  flyingCount: number;
+};
+
+const emojiCanvasCache = new Map<string, HTMLCanvasElement>();
+
+function lerp(min: number, max: number): number {
+  return min + Math.random() * (max - min);
+}
+
+const HERO_PAD_RATIO = 0.24;
+
+type EmojiBitmap = {
+  canvas: HTMLCanvasElement;
+  /** Multiply CSS glyph size by this when drawImage'ing to keep padding uncropped. */
+  canvasScale: number;
+};
+
+function getEmojiCanvas(emoji: string, tintColor?: string, cssPx?: number): HTMLCanvasElement {
+  return getEmojiBitmap(emoji, tintColor, cssPx, 0).canvas;
+}
+
+function getEmojiBitmap(
+  emoji: string,
+  tintColor: string | undefined,
+  cssPx: number | undefined,
+  padRatio: number
+): EmojiBitmap {
+  const targetCss = Math.max(16, Math.round(cssPx ?? EMOJI_CACHE_PX));
+  const dpr = typeof window !== 'undefined' ? Math.min(window.devicePixelRatio || 1, 2) : 1;
+  const fontPx = Math.round(targetCss * dpr);
+  const pad = Math.ceil(fontPx * padRatio);
+  const size = fontPx + pad * 2;
+  const cacheKey = `${emoji}|px:${fontPx}|pad:${pad}|tint:${tintColor ?? ''}`;
+  const cached = emojiCanvasCache.get(cacheKey);
+  if (cached) {
+    return { canvas: cached, canvasScale: size / fontPx };
+  }
+
+  const canvas = document.createElement('canvas');
+  canvas.width = size;
+  canvas.height = size;
+  const ctx = canvas.getContext('2d');
+  if (ctx) {
+    ctx.textAlign = 'center';
+    ctx.textBaseline = 'middle';
+    ctx.imageSmoothingEnabled = false;
+    ctx.font = `${fontPx}px "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif`;
+    // Slight optical nudge — color emoji fonts sit high in the em box.
+    ctx.fillText(emoji, size / 2, size / 2 + fontPx * 0.06);
+
+    if (tintColor) {
+      ctx.globalCompositeOperation = 'source-atop';
+      ctx.fillStyle = tintColor;
+      ctx.fillRect(0, 0, size, size);
+      ctx.globalCompositeOperation = 'source-over';
+    }
+  }
+  emojiCanvasCache.set(cacheKey, canvas);
+  return { canvas, canvasScale: size / Math.max(fontPx, 1) };
+}
+
+function setHeroEmoji(hero: HeroFace, emoji: string) {
+  const bitmap = getEmojiBitmap(emoji, undefined, hero.drawSize, HERO_PAD_RATIO);
+  hero.emoji = emoji;
+  hero.emojiCanvas = bitmap.canvas;
+  hero.canvasScale = bitmap.canvasScale;
+}
+
+function setHeroSize(hero: HeroFace, cssPx: number) {
+  if (!(cssPx > 0)) return;
+  if (Math.abs(cssPx - hero.drawSize) < 0.5) return;
+  hero.drawSize = cssPx;
+  hero.halfSize = cssPx / 2;
+  const bitmap = getEmojiBitmap(hero.emoji, undefined, cssPx, HERO_PAD_RATIO);
+  hero.emojiCanvas = bitmap.canvas;
+  hero.canvasScale = bitmap.canvasScale;
+}
+
+function particleTint(profile: EmojiBurstProfile, emoji: string): string | undefined {
+  if (!profile.tintColor || !profile.tintEmojis?.length) return undefined;
+  return profile.tintEmojis.includes(emoji) ? profile.tintColor : undefined;
+}
+
+/** Spew particles for morph bursts — never the morphTo face (that stays on the hero). */
+function pickSpewEmoji(profile: EmojiBurstProfile, primaryEmoji: string): string {
+  const morphTo = profile.morphTo;
+  const companions = (profile.companions ?? []).filter((e) => e !== morphTo);
+  if (morphTo && companions.length) {
+    return companions[Math.floor(Math.random() * companions.length)] ?? primaryEmoji;
+  }
+  const picked = pickParticleEmoji(profile, primaryEmoji);
+  return picked === morphTo ? primaryEmoji : picked;
+}
+
+function buildSpawnPlan(
+  profile: EmojiBurstProfile,
+  primaryEmoji: string,
+  startMs: number
+): SpawnItem[] {
+  // Anchored morphing hero is drawn separately — skip a flying hero twin.
+  const plan: SpawnItem[] = profile.morphTo
+    ? []
+    : [
+        {
+          atMs: startMs,
+          emoji: primaryEmoji,
+          fontSize: lerp(profile.heroFontSizeMin, profile.heroFontSizeMax),
+        },
+      ];
+
+  const count = profile.particleCount;
+  for (let i = 0; i < count; i += 1) {
+    const slot = (i + 0.5) / count;
+    const eased = slot * slot;
+    plan.push({
+      atMs:
+        startMs +
+        80 +
+        eased * SPAWN_WINDOW_MS +
+        (Math.random() - 0.5) * 70,
+      emoji: pickSpewEmoji(profile, primaryEmoji),
+      fontSize: lerp(profile.fontSizeMin, profile.fontSizeMax),
+    });
+  }
+
+  plan.sort((a, b) => a.atMs - b.atMs);
+  return plan;
+}
+
+function applyMorph(sim: FireworkSim, now: number) {
+  const to = sim.profile.morphTo;
+  if (!to || sim.morphAtMs === null || now < sim.morphAtMs) return;
+  if (sim.hero?.morphed) return;
+
+  // Only the stand-in face morphs — spray stays droplets / companions.
+  if (sim.hero) {
+    setHeroEmoji(sim.hero, to);
+    sim.hero.morphed = true;
+  }
+}
+
+function ensurePile(sim: FireworkSim): CanvasRenderingContext2D {
+  if (sim.pileCanvas && sim.pileCtx) return sim.pileCtx;
+  const canvas = document.createElement('canvas');
+  canvas.width = sim.width;
+  canvas.height = sim.height;
+  const ctx = canvas.getContext('2d');
+  if (!ctx) throw new Error('firework pile unsupported');
+  ctx.imageSmoothingEnabled = false;
+  sim.pileCanvas = canvas;
+  sim.pileCtx = ctx;
+  return ctx;
+}
+
+function stampSettled(sim: FireworkSim, p: FireworkParticle) {
+  const ctx = ensurePile(sim);
+  const rad = (p.angle * Math.PI) / 180;
+  const cos = Math.cos(rad);
+  const sin = Math.sin(rad);
+  ctx.setTransform(cos, sin, -sin, cos, p.x, p.y);
+  ctx.globalAlpha = 1;
+  ctx.drawImage(p.emojiCanvas, -p.halfSize, -p.halfSize, p.drawSize, p.drawSize);
+  ctx.setTransform(1, 0, 0, 1, 0, 0);
+}
+
+function spawnOne(sim: FireworkSim, item: SpawnItem, now: number) {
+  const { profile, origin } = sim;
+  const jitter = Math.max(4, (origin.maskRadius ?? 28) * 0.25);
+  const directed = profile.angleSpread !== undefined;
+  const angle = directed ? sampleBurstAngle(profile) : Math.random() * Math.PI * 2;
+  const speed = lerp(profile.speedMin, profile.speedMax);
+  const launchUp = lerp(profile.launchUpMin, profile.launchUpMax);
+  const drawSize = item.fontSize * EMOJI_CACHE_SCALE * 0.85;
+  const emoji = item.emoji;
+
+  // Directed cones (e.g. throw-up) push along the sampled angle.
+  // Undirected fireworks keep the classic upward launch kick.
+  let vx = Math.cos(angle) * speed + (Math.random() - 0.5) * 40;
+  let vy = Math.sin(angle) * speed;
+  if (directed) {
+    const bias = profile.angleBias ?? angle;
+    vx += Math.cos(bias) * launchUp * 0.25;
+    vy += Math.sin(bias) * launchUp;
+  } else {
+    vy -= launchUp;
+  }
+
+  const tint = particleTint(profile, emoji);
+
+  sim.particles.push({
+    x: origin.x + (Math.random() - 0.5) * jitter,
+    y: origin.y + (Math.random() - 0.5) * jitter,
+    vx,
+    vy,
+    spin: lerp(profile.spinMin, profile.spinMax) * 0.35,
+    angle: (Math.random() - 0.5) * 40,
+    emoji,
+    emojiCanvas: getEmojiCanvas(emoji, tint),
+    drawSize,
+    halfSize: drawSize / 2,
+    bornAt: now,
+    settled: false,
+  });
+  sim.flyingCount += 1;
+}
+
+function settleParticle(sim: FireworkSim, p: FireworkParticle) {
+  const cols = sim.pileCols.length;
+  let col = Math.floor(p.x / PILE_CELL);
+  if (col < 0) col = 0;
+  if (col >= cols) col = cols - 1;
+
+  // Prefer the intended column; spill to neighbors if that stack is already tall.
+  let bestCol = col;
+  let bestH = sim.pileCols[col];
+  for (const delta of [0, -1, 1, -2, 2]) {
+    const c = col + delta;
+    if (c < 0 || c >= cols) continue;
+    if (sim.pileCols[c] < bestH) {
+      bestH = sim.pileCols[c];
+      bestCol = c;
+    }
+  }
+
+  const stack = sim.pileCols[bestCol];
+  sim.pileCols[bestCol] = stack + 1;
+  p.x = bestCol * PILE_CELL + PILE_CELL * 0.5 + (Math.random() - 0.5) * 6;
+  p.y = sim.floorY - stack * (PILE_CELL * 0.72) - p.halfSize;
+  p.vx = 0;
+  p.vy = 0;
+  p.spin = 0;
+  p.settled = true;
+  sim.flyingCount = Math.max(0, sim.flyingCount - 1);
+  stampSettled(sim, p);
+}
+
+export function createFireworkSim(
+  widthPx: number,
+  heightPx: number,
+  originPx: BurstPoint,
+  primaryEmoji: string,
+  profile: EmojiBurstProfile,
+  startMs = performance.now(),
+  /** Pixel size of the source jumbo emoji — hero face matches this when set. */
+  heroSizePx?: number
+): FireworkSim {
+  const colCount = Math.max(8, Math.ceil(widthPx / PILE_CELL));
+  const fallbackHero =
+    lerp(profile.heroFontSizeMin, profile.heroFontSizeMax) * EMOJI_CACHE_SCALE * 0.95;
+  const heroSize = heroSizePx && heroSizePx > 0 ? heroSizePx : fallbackHero;
+  const hero: HeroFace | null = profile.morphTo
+    ? (() => {
+        const bitmap = getEmojiBitmap(primaryEmoji, undefined, heroSize, HERO_PAD_RATIO);
+        return {
+          emoji: primaryEmoji,
+          emojiCanvas: bitmap.canvas,
+          drawSize: heroSize,
+          halfSize: heroSize / 2,
+          canvasScale: bitmap.canvasScale,
+          morphed: false,
+        };
+      })()
+    : null;
+
+  const spawnPlan = buildSpawnPlan(profile, primaryEmoji, startMs);
+  // Keep the spewing stand-in up for the whole fountain — not just a short flash.
+  const lastSpawnAt = spawnPlan.length > 0 ? spawnPlan[spawnPlan.length - 1].atMs : startMs;
+  const heroUntilMs = profile.morphTo
+    ? profile.heroDurationMs != null
+      ? startMs + profile.heroDurationMs
+      : lastSpawnAt + 120
+    : null;
+
+  return {
+    particles: [],
+    profile,
+    primaryEmoji,
+    morphAtMs: profile.morphTo ? startMs + (profile.morphAfterMs ?? 220) : null,
+    heroUntilMs,
+    hero,
+    width: widthPx,
+    height: heightPx,
+    origin: originPx,
+    startMs,
+    spawnPlan,
+    spawnCursor: 0,
+    floorY: heightPx - FLOOR_PAD,
+    pileCols: new Uint16Array(colCount),
+    pileCanvas: null,
+    pileCtx: null,
+    flyingCount: 0,
+  };
+}
+
+/** Keep the stand-in face glued to the live jumbo metrics. */
+export function syncFireworkHero(
+  sim: FireworkSim,
+  metrics: { x: number; y: number; size: number } | null
+) {
+  if (!sim.hero || !metrics) return;
+  sim.origin.x = metrics.x;
+  sim.origin.y = metrics.y;
+  setHeroSize(sim.hero, metrics.size);
+}
+
+/** @returns false when the burst should be removed. */
+export function stepFireworkSim(sim: FireworkSim, now: number, dtSeconds: number): boolean {
+  if (now - sim.startMs > FIREWORK_TOTAL_MS) return false;
+
+  applyMorph(sim, now);
+
+  if (sim.hero && sim.heroUntilMs !== null && now >= sim.heroUntilMs) {
+    sim.hero = null;
+  }
+
+  const dt = Math.min(dtSeconds, 0.05);
+  const g = sim.profile.gravity;
+
+  let spawned = 0;
+  while (
+    spawned < MAX_SPAWNS_PER_FRAME &&
+    sim.spawnCursor < sim.spawnPlan.length &&
+    sim.spawnPlan[sim.spawnCursor].atMs <= now
+  ) {
+    spawnOne(sim, sim.spawnPlan[sim.spawnCursor], now);
+    sim.spawnCursor += 1;
+    spawned += 1;
+  }
+
+  const floor = sim.floorY;
+  const left = 4;
+  const right = sim.width - 4;
+
+  for (let i = 0; i < sim.particles.length; i += 1) {
+    const p = sim.particles[i];
+    if (p.settled) continue;
+
+    p.vy += g * dt;
+    p.vx *= DRAG;
+    p.vy *= DRAG;
+    p.x += p.vx * dt;
+    p.y += p.vy * dt;
+    p.angle += p.spin * dt;
+
+    if (p.x < left) {
+      p.x = left;
+      p.vx = Math.abs(p.vx) * BOUNCE;
+    } else if (p.x > right) {
+      p.x = right;
+      p.vx = -Math.abs(p.vx) * BOUNCE;
+    }
+
+    if (p.y >= floor - p.halfSize) {
+      p.y = floor - p.halfSize;
+      const speed = Math.hypot(p.vx, p.vy);
+      if (speed < SETTLE_SPEED || Math.abs(p.vy) < SETTLE_SPEED * 0.55) {
+        settleParticle(sim, p);
+      } else {
+        p.vy = -Math.abs(p.vy) * BOUNCE;
+        p.vx *= 0.85;
+        p.spin *= 0.7;
+      }
+    }
+  }
+
+  return true;
+}
+
+export function drawFireworkSim(
+  context: CanvasRenderingContext2D,
+  sim: FireworkSim,
+  now: number
+) {
+  const elapsed = now - sim.startMs;
+  let fade = 1;
+  if (elapsed >= SETTLE_HOLD_MS) {
+    fade = 1 - Math.min(1, (elapsed - SETTLE_HOLD_MS) / FADE_MS);
+  }
+
+  context.setTransform(1, 0, 0, 1, 0, 0);
+  context.imageSmoothingEnabled = false;
+
+  if (sim.pileCanvas) {
+    context.globalAlpha = fade;
+    context.drawImage(sim.pileCanvas, 0, 0);
+  }
+
+  // Anchored face at the spew origin — morphs 🤢 → 🤮 mid-throw, then drops away.
+  if (sim.hero && fade > 0.02) {
+    const hero = sim.hero;
+    const heaveAmp = Math.max(1.5, hero.drawSize * 0.02);
+    const heave = Math.sin(elapsed / 70) * (hero.morphed ? heaveAmp * 1.25 : heaveAmp);
+    // Scale includes bitmap padding so the glyph matches jumbo size without clipping.
+    const box = hero.drawSize * hero.canvasScale;
+    const half = box / 2;
+    context.globalAlpha = fade;
+    context.setTransform(1, 0, 0, 1, sim.origin.x, sim.origin.y + heave);
+    context.drawImage(hero.emojiCanvas, -half, -half, box, box);
+    context.setTransform(1, 0, 0, 1, 0, 0);
+  }
+
+  for (let i = 0; i < sim.particles.length; i += 1) {
+    const p = sim.particles[i];
+    if (p.settled) continue;
+
+    const ageMs = now - p.bornAt;
+    if (ageMs < 0) continue;
+
+    let opacity = fade;
+    let scale = 1;
+    if (ageMs < SPARKLE_IN_MS) {
+      const t = ageMs / SPARKLE_IN_MS;
+      const appear = t * t * (3 - 2 * t);
+      scale = 0.5 + 0.65 * appear;
+      opacity *= appear;
+    }
+    if (opacity <= 0.02) continue;
+
+    const rad = (p.angle * Math.PI) / 180;
+    const size = p.drawSize * scale;
+    const half = size / 2;
+    const cos = Math.cos(rad);
+    const sin = Math.sin(rad);
+
+    context.globalAlpha = opacity;
+    context.setTransform(cos, sin, -sin, cos, p.x, p.y);
+    context.drawImage(p.emojiCanvas, -half, -half, size, size);
+  }
+
+  context.globalAlpha = 1;
+  context.setTransform(1, 0, 0, 1, 0, 0);
+}
+
+export function getFireworkDpr(): number {
+  return 1;
+}

src/app/features/room/emoji-confetti/jumboEmojiInteraction.ts

@@ -0,0 +1,34 @@
+import { KeyboardEvent, MouseEvent } from 'react';
+
+export type JumboEmojiClickHandler = (body: string, event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>) => void;
+
+export function getJumboEmojiInteractionProps({
+  body,
+  isJumboEmoji,
+  onJumboEmojiClick,
+}: {
+  body: string;
+  isJumboEmoji: boolean;
+  onJumboEmojiClick?: JumboEmojiClickHandler;
+}) {
+  if (!isJumboEmoji || !onJumboEmojiClick) {
+    return {};
+  }
+
+  const activate = (event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>) => {
+    if ('key' in event) {
+      if (event.key !== 'Enter' && event.key !== ' ') return;
+      event.preventDefault();
+    }
+    event.stopPropagation();
+    onJumboEmojiClick(body, event);
+  };
+
+  return {
+    role: 'button' as const,
+    tabIndex: 0,
+    title: 'Throw emoji confetti',
+    onClick: activate,
+    onKeyDown: activate,
+  };
+}

src/app/features/room/emoji-confetti/resolveClickedEmoji.ts

@@ -0,0 +1,54 @@
+import { KeyboardEvent, MouseEvent } from 'react';
+import { extractJumboEmojis } from './sendEmojiConfetti';
+import { BurstPoint, getBurstPointFromElement } from './burstOrigin';
+
+export function resolveClickedEmoji(
+  event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>,
+  fallbackBody: string
+): { emoji: string; origin: BurstPoint } | null {
+  const currentTarget = event.currentTarget as HTMLElement;
+  const target = event.target as HTMLElement;
+  const emoticonEl = target.closest('[data-emoticon]') ?? currentTarget.querySelector('[data-emoticon]');
+  if (emoticonEl instanceof HTMLElement) {
+    const emoji = emoticonEl.getAttribute('data-emoticon');
+    if (emoji) {
+      return {
+        emoji,
+        origin: getBurstPointFromElement(emoticonEl),
+      };
+    }
+  }
+
+  if (!currentTarget.closest('[data-jumbo-emoji]') && !currentTarget.hasAttribute('data-jumbo-emoji')) {
+    return null;
+  }
+
+  const emojis = extractJumboEmojis(fallbackBody);
+  if (emojis.length === 0) return null;
+
+  if ('clientX' in event) {
+    return {
+      emoji: emojis[0],
+      origin: {
+        x: event.clientX,
+        y: event.clientY,
+      },
+    };
+  }
+
+  const firstEmoticon = currentTarget.querySelector('[data-emoticon]');
+  if (firstEmoticon instanceof HTMLElement) {
+    const emoji = firstEmoticon.getAttribute('data-emoticon');
+    if (emoji) {
+      return {
+        emoji,
+        origin: getBurstPointFromElement(firstEmoticon),
+      };
+    }
+  }
+
+  return {
+    emoji: emojis[0],
+    origin: getBurstPointFromElement(currentTarget),
+  };
+}

src/app/features/room/emoji-confetti/sendEmojiConfetti.ts

@@ -0,0 +1,42 @@
+import { MatrixClient } from 'matrix-js-sdk';
+import { EMOJI_REG_G, JUMBO_EMOJI_REG } from '../../../utils/regex';
+import { trimReplyFromBody } from '../../../utils/room';
+import { emojis } from '../../../plugins/emoji';
+import { EMOJI_CONFETTI_EVENT_TYPE, EmojiConfettiContent } from './types';
+
+const SHORTCODE_PATTERN = /:([^\s:]+):/g;
+
+export function extractJumboEmojis(body: string): string[] {
+  const trimmedBody = trimReplyFromBody(body).trim();
+  if (!JUMBO_EMOJI_REG.test(trimmedBody)) return [];
+
+  const found: string[] = [];
+
+  for (const match of trimmedBody.matchAll(EMOJI_REG_G)) {
+    const emoji = match[1];
+    if (emoji) found.push(emoji);
+  }
+
+  for (const match of trimmedBody.matchAll(SHORTCODE_PATTERN)) {
+    const shortcode = match[1];
+    const resolved = emojis.find((emoji) => emoji.shortcode === shortcode);
+    if (resolved) found.push(resolved.unicode);
+  }
+
+  return found.length > 0 ? found : ['🎉'];
+}
+
+export function sendEmojiConfettiEvent(
+  mx: MatrixClient,
+  roomId: string,
+  targetEventId: string,
+  emojis: string[]
+) {
+  const content: EmojiConfettiContent = {
+    emojis,
+    msgtype: EMOJI_CONFETTI_EVENT_TYPE,
+    target_event_id: targetEventId,
+  };
+
+  return mx.sendEvent(roomId, EMOJI_CONFETTI_EVENT_TYPE as never, content);
+}

src/app/features/room/emoji-confetti/types.ts

@@ -0,0 +1,16 @@
+import type { BurstPoint } from './burstOrigin';
+
+export const EMOJI_CONFETTI_EVENT_TYPE = 'app.relay.emoji_confetti';
+
+export type EmojiConfettiContent = {
+  emojis?: string[];
+  msgtype?: string;
+  target_event_id?: string;
+};
+
+export type EmojiConfettiBurst = {
+  id: string;
+  targetEventId: string;
+  emojis: string[];
+  origin: BurstPoint;
+};

src/app/features/room/emoji-confetti/useEmojiConfetti.ts

@@ -0,0 +1,137 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { MatrixEvent, Room, RoomEvent } from 'matrix-js-sdk';
+import { BurstPoint, resolveBurstOrigin } from './burstOrigin';
+import {
+  EMOJI_CONFETTI_EVENT_TYPE,
+  EmojiConfettiBurst,
+  EmojiConfettiContent,
+} from './types';
+
+function scheduleBurstFromValues(
+  burstId: string,
+  emojis: string[],
+  targetEventId: string | undefined,
+  onBurst: (burst: EmojiConfettiBurst) => void,
+  attempt = 0,
+  explicitOrigin?: BurstPoint
+) {
+  const targetElement =
+    targetEventId &&
+    document.querySelector(`[data-message-id="${CSS.escape(targetEventId)}"]`);
+
+  if (targetEventId && !targetElement && attempt < 8) {
+    window.setTimeout(
+      () =>
+        scheduleBurstFromValues(
+          burstId,
+          emojis,
+          targetEventId,
+          onBurst,
+          attempt + 1,
+          explicitOrigin
+        ),
+      50
+    );
+    return;
+  }
+
+  onBurst({
+    id: burstId,
+    targetEventId: targetEventId ?? '',
+    emojis: emojis.length > 0 ? emojis : ['🎉'],
+    origin: resolveBurstOrigin(targetEventId, emojis, explicitOrigin),
+  });
+}
+
+function scheduleBurst(
+  event: MatrixEvent,
+  onBurst: (burst: EmojiConfettiBurst) => void,
+  attempt = 0
+) {
+  const eventId = event.getId();
+  if (!eventId) return;
+
+  const { emojis, targetEventId } = parseEmojiConfettiContent(event.getContent());
+  scheduleBurstFromValues(eventId, emojis, targetEventId, onBurst, attempt);
+}
+
+function parseEmojiConfettiContent(content: unknown): { emojis: string[]; targetEventId?: string } {
+  const confettiContent = content as EmojiConfettiContent;
+  const emojis = Array.isArray(confettiContent.emojis)
+    ? confettiContent.emojis.filter((emoji): emoji is string => typeof emoji === 'string' && emoji.length > 0)
+    : [];
+
+  return {
+    emojis: emojis.length > 0 ? emojis : ['🎉'],
+    targetEventId:
+      typeof confettiContent.target_event_id === 'string'
+        ? confettiContent.target_event_id
+        : undefined,
+  };
+}
+
+export function useEmojiConfetti(room: Room) {
+  const [bursts, setBursts] = useState<EmojiConfettiBurst[]>([]);
+  const seenEventIdsRef = useRef(new Set<string>());
+  const ownEventIdsRef = useRef(new Set<string>());
+
+  const addBurst = useCallback((burst: EmojiConfettiBurst) => {
+    setBursts((current) => [...current, burst]);
+  }, []);
+
+  const registerOwnEventId = useCallback((eventId: string) => {
+    ownEventIdsRef.current.add(eventId);
+  }, []);
+
+  const queueBurst = useCallback((event: MatrixEvent) => {
+    const eventId = event.getId();
+    if (!eventId || seenEventIdsRef.current.has(eventId)) return;
+
+    seenEventIdsRef.current.add(eventId);
+
+    if (ownEventIdsRef.current.has(eventId)) {
+      ownEventIdsRef.current.delete(eventId);
+      return;
+    }
+
+    scheduleBurst(event, addBurst);
+  }, [addBurst]);
+
+  const triggerLocalBurst = useCallback(
+    (targetEventId: string, emojis: string[], origin?: BurstPoint) => {
+      const burstId = `local-${targetEventId}-${Date.now()}`;
+      scheduleBurstFromValues(burstId, emojis, targetEventId, addBurst, 0, origin);
+    },
+    [addBurst]
+  );
+
+  useEffect(() => {
+    const handleTimeline: (
+      event: MatrixEvent,
+      eventRoom: Room | undefined,
+      toStartOfTimeline?: boolean,
+      removed?: boolean
+    ) => void = (event, eventRoom, toStartOfTimeline, removed) => {
+      if (removed || toStartOfTimeline || eventRoom?.roomId !== room.roomId) return;
+      if (event.getType() !== EMOJI_CONFETTI_EVENT_TYPE) return;
+
+      queueBurst(event);
+    };
+
+    room.on(RoomEvent.Timeline, handleTimeline);
+    return () => {
+      room.off(RoomEvent.Timeline, handleTimeline);
+    };
+  }, [queueBurst, room]);
+
+  const removeBurst = useCallback((burstId: string) => {
+    setBursts((current) => current.filter((burst) => burst.id !== burstId));
+  }, []);
+
+  return {
+    bursts,
+    removeBurst,
+    triggerLocalBurst,
+    registerOwnEventId,
+  };
+}

src/app/features/room/emoji-confetti/useJumboEmojiConfetti.ts

@@ -0,0 +1,37 @@
+import { KeyboardEvent, MouseEvent, useCallback } from 'react';
+import { Room } from 'matrix-js-sdk';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { resolveClickedEmoji } from './resolveClickedEmoji';
+import { sendEmojiConfettiEvent } from './sendEmojiConfetti';
+import { useEmojiConfetti } from './useEmojiConfetti';
+
+export function useJumboEmojiConfetti(room: Room) {
+  const mx = useMatrixClient();
+  const { bursts, removeBurst, triggerLocalBurst, registerOwnEventId } = useEmojiConfetti(room);
+
+  const handleJumboEmojiClick = useCallback(
+    (targetEventId: string, body: string, event: MouseEvent<HTMLElement> | KeyboardEvent<HTMLElement>) => {
+      const clicked = resolveClickedEmoji(event, body);
+      if (!clicked) return;
+
+      const emojis = [clicked.emoji];
+
+      triggerLocalBurst(targetEventId, emojis, clicked.origin);
+      sendEmojiConfettiEvent(mx, room.roomId, targetEventId, emojis)
+        .then((response) => {
+          const eventId = response?.event_id;
+          if (eventId) registerOwnEventId(eventId);
+        })
+        .catch((error) => {
+          console.error('[emoji-confetti] Failed to send confetti event:', error);
+        });
+    },
+    [mx, registerOwnEventId, room.roomId, triggerLocalBurst]
+  );
+
+  return {
+    bursts,
+    removeBurst,
+    handleJumboEmojiClick,
+  };
+}

src/app/features/settings/account/Profile.tsx

@@ -39,12 +39,14 @@ import { AvatarPresence, PresenceBadge } from '../../../components/presence';
 import { BreakWord, LineClamp3 } from '../../../styles/Text.css';
 import colorMXID, { getColorMXIDValue } from '../../../../util/colorMXID';
 import {
-  extractMetadataFromImage,
   embedMetadataInImage,
   detectImageFormat,
   getMimeType,
   getExtension,
   ImageMetadata,
+  needsPngForMetadata,
+  convertImageDataToPng,
+  uint8ArrayToBlob,
 } from '../../../utils/imageMetadata';
 import { getCurrentAccessToken } from '../../../utils/auth';
 
@@ -473,7 +475,35 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
       setSaving(true);
       setError(undefined);
       try {
-        // Fetch the raw uploaded image so we can embed existing banner/color metadata
+        // Re-embed existing banner/color/style into the new avatar when present
+        const metadata: ImageMetadata = {
+          banner: userBanner,
+          color: userColor,
+          avatarBorderColor: profileStyle.avatarBorderColor,
+          gradient: profileStyle.gradient,
+        };
+        const hasMetadata = Boolean(
+          metadata.color ||
+            metadata.banner ||
+            metadata.avatarBorderColor ||
+            metadata.gradient
+        );
+
+        // Nothing to re-embed — use the already-uploaded MXC directly
+        if (!hasMetadata) {
+          await mx.setAvatarUrl(upload.mxc);
+          const userId = mx.getUserId();
+          if (userId) {
+            const user = mx.getUser(userId);
+            if (user && user.avatarUrl !== upload.mxc) {
+              user.setAvatarUrl(upload.mxc);
+            }
+          }
+          setAvatarFile(undefined);
+          await syncUserAvatar();
+          return;
+        }
+
         const httpUrl = mxcUrlToHttp(mx, upload.mxc, useAuthentication);
         if (!httpUrl) throw new Error('Could not resolve uploaded avatar URL');
 
@@ -482,30 +512,33 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
         let response = await fetch(httpUrl, {
           headers: accessToken && useAuthentication ? { Authorization: `Bearer ${accessToken}` } : undefined,
         });
-        
+
         // If we got a 401 and we tried with auth, fallback to unauthenticated request
         if (!response.ok && response.status === 401 && accessToken && useAuthentication) {
           console.warn('[Profile] Auth failed (401), attempting unauthenticated fallback for avatar fetch');
           response = await fetch(httpUrl);
         }
-        
-        if (!response.ok) throw new Error('Failed to fetch uploaded avatar');
-        const avatarData = await response.arrayBuffer();
 
-        const format = detectImageFormat(avatarData);
+        if (!response.ok) throw new Error('Failed to fetch uploaded avatar');
+        let avatarData: ArrayBuffer | Uint8Array = await response.arrayBuffer();
+
+        let format = detectImageFormat(avatarData);
         if (format === 'unknown') throw new Error('Unsupported avatar image format');
 
-        // Re-embed the existing banner URL and profile color into the new avatar
-        const metadata: ImageMetadata = {
-          banner: userBanner,
-          color: userColor,
-        };
+        // Banner / border / gradient only live in PNG tEXt — convert JPEG/WebP/GIF first
+        if (format !== 'png' && needsPngForMetadata(metadata)) {
+          const pngData = await convertImageDataToPng(avatarData);
+          if (!pngData) throw new Error('Failed to convert avatar to PNG for metadata');
+          avatarData = pngData;
+          format = 'png';
+        }
+
         const modifiedData = embedMetadataInImage(avatarData, metadata);
         if (!modifiedData) throw new Error('Failed to embed metadata in avatar');
 
         const mimeType = getMimeType(format);
         const extension = getExtension(format);
-        const blob = new Blob([modifiedData], { type: mimeType });
+        const blob = uint8ArrayToBlob(modifiedData, mimeType);
         const uploadResponse = await mx.uploadContent(blob, { name: `avatar.${extension}`, type: mimeType });
 
         await mx.setAvatarUrl(uploadResponse.content_uri);
@@ -525,7 +558,7 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
       }
       setSaving(false);
     },
-    [mx, useAuthentication, userBanner, userColor, syncUserAvatar]
+    [mx, useAuthentication, userBanner, userColor, profileStyle, syncUserAvatar]
   );
 
   const handleRemoveBanner = async () => {

src/app/features/settings/general/General.tsx

@@ -8,6 +8,7 @@ import React, {
 } from 'react';
 import dayjs from 'dayjs';
 import { as, Box, Button, Chip, color, config, Header, IconButton, Input, Menu, MenuItem, PopOut, RectCords, Scroll, Switch, Text, toRem } from 'folds';
+import { useSetAtom } from 'jotai';
 import { Icon, Icons } from '../../../components/icons';
 import { HexColorPicker } from 'react-colorful';
 import { isKeyHotkey } from 'is-hotkey';
@@ -24,6 +25,7 @@ import {
   LightTheme,
   Theme,
   ThemeKind,
+  themePreviewIdAtom,
   useSystemThemeKind,
   useThemeNames,
   useThemes,
@@ -41,28 +43,49 @@ type ThemeSelectorProps = {
   onSelect: (theme: Theme) => void;
 };
 const ThemeSelector = as<'div', ThemeSelectorProps>(
-  ({ themeNames, themes, selected, onSelect, ...props }, ref) => (
-    <Menu {...props} ref={ref}>
-      <Box direction="Column" gap="100" style={{ padding: config.space.S100 }}>
-        {themes.map((theme) => (
-          <MenuItem
-            key={theme.id}
-            size="300"
-            variant={theme.id === selected.id ? 'Primary' : 'Surface'}
-            radii="300"
-            onClick={() => onSelect(theme)}
-          >
-            <Text size="T300">{themeNames[theme.id] ?? theme.id}</Text>
-          </MenuItem>
-        ))}
-      </Box>
-    </Menu>
-  )
+  ({ themeNames, themes, selected, onSelect, ...props }, ref) => {
+    const setPreviewId = useSetAtom(themePreviewIdAtom);
+
+    useEffect(
+      () => () => {
+        setPreviewId(undefined);
+      },
+      [setPreviewId]
+    );
+
+    const clearPreview = () => setPreviewId(undefined);
+    const previewTheme = (theme: Theme) => setPreviewId(theme.id);
+
+    return (
+      <Menu
+        {...props}
+        ref={ref}
+        onMouseLeave={clearPreview}
+      >
+        <Box direction="Column" gap="100" style={{ padding: config.space.S100 }}>
+          {themes.map((theme) => (
+            <MenuItem
+              key={theme.id}
+              size="300"
+              variant={theme.id === selected.id ? 'Primary' : 'Surface'}
+              radii="300"
+              onMouseEnter={() => previewTheme(theme)}
+              onFocus={() => previewTheme(theme)}
+              onClick={() => onSelect(theme)}
+            >
+              <Text size="T300">{themeNames[theme.id] ?? theme.id}</Text>
+            </MenuItem>
+          ))}
+        </Box>
+      </Menu>
+    );
+  }
 );
 
 function SelectTheme({ disabled }: { disabled?: boolean }) {
   const themes = useThemes();
   const themeNames = useThemeNames();
+  const setPreviewId = useSetAtom(themePreviewIdAtom);
   const [themeId, setThemeId] = useSetting(settingsAtom, 'themeId');
   const [menuCords, setMenuCords] = useState<RectCords>();
   const selectedTheme = themes.find((theme) => theme.id === themeId) ?? LightTheme;
@@ -72,10 +95,16 @@ function SelectTheme({ disabled }: { disabled?: boolean }) {
   };
 
   const handleThemeSelect = (theme: Theme) => {
+    setPreviewId(undefined);
     setThemeId(theme.id);
     setMenuCords(undefined);
   };
 
+  const closeMenu = () => {
+    setPreviewId(undefined);
+    setMenuCords(undefined);
+  };
+
   return (
     <>
       <Button
@@ -99,7 +128,7 @@ function SelectTheme({ disabled }: { disabled?: boolean }) {
           <FocusTrap
             focusTrapOptions={{
               initialFocus: false,
-              onDeactivate: () => setMenuCords(undefined),
+              onDeactivate: closeMenu,
               clickOutsideDeactivates: true,
               isKeyForward: (evt: KeyboardEvent) =>
                 evt.key === 'ArrowDown' || evt.key === 'ArrowRight',
@@ -125,6 +154,7 @@ function SystemThemePreferences() {
   const themeKind = useSystemThemeKind();
   const themeNames = useThemeNames();
   const themes = useThemes();
+  const setPreviewId = useSetAtom(themePreviewIdAtom);
   const [lightThemeId, setLightThemeId] = useSetting(settingsAtom, 'lightThemeId');
   const [darkThemeId, setDarkThemeId] = useSetting(settingsAtom, 'darkThemeId');
 
@@ -145,15 +175,27 @@ function SystemThemePreferences() {
   };
 
   const handleLightThemeSelect = (theme: Theme) => {
+    setPreviewId(undefined);
     setLightThemeId(theme.id);
     setLTCords(undefined);
   };
 
   const handleDarkThemeSelect = (theme: Theme) => {
+    setPreviewId(undefined);
     setDarkThemeId(theme.id);
     setDTCords(undefined);
   };
 
+  const closeLightMenu = () => {
+    setPreviewId(undefined);
+    setLTCords(undefined);
+  };
+
+  const closeDarkMenu = () => {
+    setPreviewId(undefined);
+    setDTCords(undefined);
+  };
+
   return (
     <Box wrap="Wrap" gap="400">
       <SettingTile
@@ -179,7 +221,7 @@ function SystemThemePreferences() {
           <FocusTrap
             focusTrapOptions={{
               initialFocus: false,
-              onDeactivate: () => setLTCords(undefined),
+              onDeactivate: closeLightMenu,
               clickOutsideDeactivates: true,
               isKeyForward: (evt: KeyboardEvent) =>
                 evt.key === 'ArrowDown' || evt.key === 'ArrowRight',
@@ -220,7 +262,7 @@ function SystemThemePreferences() {
           <FocusTrap
             focusTrapOptions={{
               initialFocus: false,
-              onDeactivate: () => setDTCords(undefined),
+              onDeactivate: closeDarkMenu,
               clickOutsideDeactivates: true,
               isKeyForward: (evt: KeyboardEvent) =>
                 evt.key === 'ArrowDown' || evt.key === 'ArrowRight',

src/app/features/settings/notifications/SystemNotification.tsx

@@ -170,22 +170,34 @@ type PushStatus = {
   registered: boolean;
   distributor: string;
   endpoint: string;
+  distributors: string[];
+  lastFailure: string;
+  autoStartBlocked: boolean;
 };
 
 /** Android-only section showing UnifiedPush registration status and controls. */
 function AndroidPushNotifications() {
   const [status, setStatus] = useState<PushStatus | undefined>(undefined);
   const [loading, setLoading] = useState(true);
+  const [lastError, setLastError] = useState<string | undefined>(undefined);
 
   const refresh = useCallback(async () => {
     setLoading(true);
     const s = await getBackgroundSyncStatus();
+    const distributors = Array.isArray(s?.distributors)
+      ? s.distributors
+      : typeof s?.distributors === 'string' && s.distributors && s.distributors !== '[]'
+        ? [s.distributors]
+        : [];
     setStatus(
       s
         ? {
             registered: s.registered,
             distributor: s.distributor || '',
             endpoint: s.endpoint || '',
+            distributors,
+            lastFailure: s.lastFailure || '',
+            autoStartBlocked: Boolean(s.autoStartBlocked),
           }
         : undefined
     );
@@ -198,8 +210,14 @@ function AndroidPushNotifications() {
 
   const [resetState, reset] = useAsyncCallback(
     useCallback(async () => {
-      await requestResetPushRegistration();
+      setLastError(undefined);
+      const result = await requestResetPushRegistration();
       await refresh();
+      if (!result.success) {
+        setLastError(
+          'Selected distributor but did not get a push endpoint. In ntfy: enable UnifiedPush, allow unrestricted battery, then try Reset again.'
+        );
+      }
     }, [refresh])
   );
 
@@ -214,6 +232,50 @@ function AndroidPushNotifications() {
     resetState.status === AsyncStatus.Loading ||
     pingState.status === AsyncStatus.Loading;
 
+  const statusDescription = (() => {
+    if (loading) return 'Loading status…';
+    if (status === undefined) {
+      return (
+        <Text as="span" style={{ color: color.Critical.Main }} size="T200">
+          Failed to read push status.
+        </Text>
+      );
+    }
+    if (status.registered) {
+      return (
+        <Text as="span" size="T200">
+          {`Distributor: ${status.distributor || 'unknown'}`}
+        </Text>
+      );
+    }
+    if (status.lastFailure === 'AUTO_START_BLOCKED' || status.autoStartBlocked) {
+      return (
+        <Text as="span" style={{ color: color.Critical.Main }} size="T200">
+          Phone is blocking auto-start for Paarrot. Open App Boot / Auto-start settings, allow Paarrot (and ntfy), then tap Reset.
+        </Text>
+      );
+    }
+    if (status.lastFailure) {
+      return (
+        <Text as="span" style={{ color: color.Critical.Main }} size="T200">
+          {`Registration failed (${status.lastFailure}). Tap Reset and pick ntfy again.`}
+        </Text>
+      );
+    }
+    if (status.distributors.length === 0) {
+      return (
+        <Text as="span" style={{ color: color.Critical.Main }} size="T200">
+          No UnifiedPush distributor found. Install ntfy from Play Store/F-Droid and enable UnifiedPush in ntfy settings.
+        </Text>
+      );
+    }
+    return (
+      <Text as="span" style={{ color: color.Warning?.Main ?? color.Critical.Main }} size="T200">
+        {`Found ${status.distributors.join(', ')} but not registered yet. Tap Reset and pick ntfy.`}
+      </Text>
+    );
+  })();
+
   return (
     <Box direction="Column" gap="100">
       <Text size="L400">Android Push (UnifiedPush)</Text>
@@ -226,29 +288,20 @@ function AndroidPushNotifications() {
         <SettingTile
           title="Background Notifications"
           description={
-            loading ? (
-              'Loading status…'
-            ) : status === undefined ? (
-              <Text as="span" style={{ color: color.Critical.Main }} size="T200">
-                Failed to read push status.
-              </Text>
-            ) : status.registered ? (
-              <>
-                <Text as="span" size="T200">
-                  {`Distributor: ${status.distributor || 'unknown'}`}
+            <>
+              {statusDescription}
+              {lastError ? (
+                <Text as="span" style={{ color: color.Critical.Main, display: 'block' }} size="T200">
+                  {lastError}
                 </Text>
-              </>
-            ) : (
-              <Text as="span" style={{ color: color.Warning?.Main ?? color.Critical.Main }} size="T200">
-                Not registered. Tap &quot;Reset&quot; to choose a distributor app.
-              </Text>
-            )
+              ) : null}
+            </>
           }
           after={loading ? <Spinner variant="Secondary" /> : undefined}
         />
         <SettingTile
           title="Change Distributor"
-          description="Re-open the UnifiedPush distributor selection dialog."
+          description="Shows a list of installed UnifiedPush apps (ntfy, etc.) and registers the one you pick."
           after={
             <Button
               size="300"

src/app/hooks/useFilePasteHandler.ts

@@ -4,21 +4,30 @@ import { readClipboardImage, isTauri, isLinux } from '../utils/tauri';
 
 export const useFilePasteHandler = (onPaste: (file: File[]) => void): ClipboardEventHandler =>
   useCallback(
-    async (evt) => {
+    (evt) => {
       const files = getDataTransferFiles(evt.clipboardData);
       if (files && files.length > 0) {
+        evt.preventDefault();
         onPaste(files);
         return;
       }
 
-      // On Linux with Tauri, browser clipboard API doesn't work for images
-      // Use our custom Tauri command with arboard/Wayland support
-      if (isTauri() && isLinux()) {
-        const clipboardImage = await readClipboardImage();
-        if (clipboardImage) {
-          onPaste([clipboardImage]);
-        }
+      // Address-bar / plain-text copies still win. On Linux the native clipboard
+      // often still has a previous image (or a junk bitmap) alongside text/plain;
+      // don't treat those as an image paste.
+      const text = evt.clipboardData?.getData('text/plain')?.trim() ?? '';
+      if (text.length > 0) {
+        return;
       }
+
+      // Browser clipboardData.files is empty for raw image copies on Linux Tauri/Electron.
+      if (!(isTauri() && isLinux())) return;
+
+      // preventDefault before the async read, or the editor also inserts text.
+      evt.preventDefault();
+      void readClipboardImage().then((clipboardImage) => {
+        if (clipboardImage) onPaste([clipboardImage]);
+      });
     },
     [onPaste]
   );

src/app/hooks/useRoomNavigate.ts

@@ -56,6 +56,19 @@ export const useRoomNavigate = () => {
       }
 
       const orphanParents = openSpaceTimeline ? [roomId] : getOrphanParents(roomToParents, roomId);
+
+      // Prefer Direct for m.direct rooms unless we are already browsing a parent space
+      // of this room (keep space chrome). Opening via space while roomToParents is still
+      // catching up used to hit JoinBeforeNavigate even though the DM was listed.
+      if (mDirects.has(roomId)) {
+        const stayInSelectedSpace =
+          Boolean(spaceSelectedId) && orphanParents.includes(spaceSelectedId!);
+        if (!stayInSelectedSpace) {
+          navigate(getDirectRoomPath(roomIdOrAlias, eventId), opts);
+          return;
+        }
+      }
+
       if (orphanParents.length > 0) {
         let parentSpace: string;
         if (spaceSelectedId && orphanParents.includes(spaceSelectedId)) {
@@ -73,11 +86,6 @@ export const useRoomNavigate = () => {
         return;
       }
 
-      if (mDirects.has(roomId)) {
-        navigate(getDirectRoomPath(roomIdOrAlias, eventId), opts);
-        return;
-      }
-
       navigate(getHomeRoomPath(roomIdOrAlias, eventId), opts);
     },
     [

src/app/hooks/useTheme.ts

@@ -1,4 +1,5 @@
 import { lightTheme } from 'folds';
+import { atom, useAtomValue } from 'jotai';
 import { createContext, useContext, useEffect, useMemo, useState } from 'react';
 import { onDarkFontWeight, onLightFontWeight } from '../../config.css';
 import { butterTheme, catppuccinMochaTheme, darkTheme, discordTheme, discordDarkerTheme, mochaTheme, silverTheme, stationeryDarkTheme, stationeryTheme, twilightTheme } from '../../colors.css';
@@ -6,6 +7,9 @@ import { settingsAtom } from '../state/settings';
 import { useSetting } from '../state/hooks/settings';
 import { pluginRegistry } from '../features/settings/plugins/PluginAPI';
 
+/** Ephemeral theme id while hovering theme options in settings (not persisted). */
+export const themePreviewIdAtom = atom<string | undefined>(undefined);
+
 export enum ThemeKind {
   Light = 'light',
   Dark = 'dark',
@@ -190,6 +194,16 @@ export const useActiveTheme = (): Theme => {
   return selectedTheme;
 };
 
+/** Active theme, or hover-preview theme when browsing the theme menu. */
+export const useDisplayTheme = (): Theme => {
+  const activeTheme = useActiveTheme();
+  const themes = useThemes();
+  const previewId = useAtomValue(themePreviewIdAtom);
+
+  if (!previewId) return activeTheme;
+  return themes.find((theme) => theme.id === previewId) ?? activeTheme;
+};
+
 const ThemeContext = createContext<Theme | null>(null);
 export const ThemeContextProvider = ThemeContext.Provider;
 

src/app/hooks/useUserBanner.ts

@@ -12,6 +12,8 @@ import {
   getMimeType,
   getExtension,
   ImageMetadata,
+  convertImageDataToPng,
+  uint8ArrayToBlob,
 } from '../utils/imageMetadata';
 
 /**
@@ -137,27 +139,39 @@ export function useUserBanner(): [
       throw new Error('Failed to fetch current avatar');
     }
 
-    // Detect image format
-    const format = detectImageFormat(avatarData);
-    
+    // Detect image format — banner lives in PNG tEXt, so convert other formats first
+    let workingData: ArrayBuffer | Uint8Array = avatarData;
+    let format = detectImageFormat(workingData);
+
     if (format === 'unknown') {
       throw new Error('Unsupported avatar image format');
     }
 
+    if (format !== 'png') {
+      console.log('[updateBanner] Converting', format, 'avatar to PNG for banner metadata');
+      const pngData = await convertImageDataToPng(workingData);
+      if (!pngData) {
+        throw new Error('Failed to convert avatar to PNG for banner metadata');
+      }
+      workingData = pngData;
+      format = 'png';
+    }
+
     // Get existing metadata to preserve
-    const existingMetadata = extractMetadataFromImage(avatarData);
+    const existingMetadata = extractMetadataFromImage(workingData);
     console.log('[updateBanner] Existing metadata:', existingMetadata);
-    
-    // Modify image metadata with new banner, preserving color
+
+    // Modify image metadata with new banner, preserving color.
+    // Empty string clears banner (PNG embed drops falsy fields after stripping old chunks).
     const newMetadata: ImageMetadata = {
       color: existingMetadata.color,
-      banner: newBanner,
+      banner: newBanner ?? '',
       avatarBorderColor: existingMetadata.avatarBorderColor,
       gradient: existingMetadata.gradient,
     };
     console.log('[updateBanner] New metadata to embed:', newMetadata);
-    
-    const newAvatarData = embedMetadataInImage(avatarData, newMetadata);
+
+    const newAvatarData = embedMetadataInImage(workingData, newMetadata);
 
     if (!newAvatarData) {
       throw new Error('Failed to embed banner in avatar metadata');
@@ -166,8 +180,8 @@ export function useUserBanner(): [
     // Verify the banner was embedded correctly before uploading
     const verifyMetadata = extractMetadataFromImage(newAvatarData);
     console.log('[updateBanner] Verification - extracted metadata from new avatar:', verifyMetadata);
-    
-    if (newBanner && verifyMetadata.banner !== newBanner) {
+
+    if ((newBanner || undefined) !== verifyMetadata.banner) {
       console.error('[updateBanner] Banner verification FAILED!', 'Expected:', newBanner, 'Got:', verifyMetadata.banner);
       throw new Error('Banner verification failed');
     }
@@ -176,8 +190,8 @@ export function useUserBanner(): [
     // Upload modified avatar with correct MIME type
     const mimeType = getMimeType(format);
     const extension = getExtension(format);
-    const blob = new Blob([newAvatarData], { type: mimeType });
-    
+    const blob = uint8ArrayToBlob(newAvatarData, mimeType);
+
     const uploadResponse = await mx.uploadContent(blob, {
       name: `avatar.${extension}`,
       type: mimeType,

src/app/hooks/useUserColor.ts

@@ -12,6 +12,7 @@ import {
   detectImageFormat,
   getMimeType,
   getExtension,
+  uint8ArrayToBlob,
 } from '../utils/imageMetadata';
 
 /**
@@ -176,7 +177,7 @@ export function useUserColor(): [
       // Upload modified avatar with correct MIME type
       const mimeType = getMimeType(format);
       const extension = getExtension(format);
-      const blob = new Blob([newAvatarData], { type: mimeType });
+      const blob = uint8ArrayToBlob(newAvatarData, mimeType);
       const uploadResponse = await mx.uploadContent(blob, {
         name: `avatar.${extension}`,
         type: mimeType,

src/app/hooks/useUserProfileStyle.ts

@@ -11,6 +11,8 @@ import { mxcUrlToHttp } from '../utils/matrix';import { getCurrentAccessToken }
   getExtension,
   ImageMetadata,
   ProfileGradient,
+  convertImageDataToPng,
+  uint8ArrayToBlob,
 } from '../utils/imageMetadata';
 
 /**
@@ -142,14 +144,24 @@ export function useUserProfileStyle(): [
         throw new Error('Failed to fetch current avatar');
       }
 
-      // Detect image format
-      const format = detectImageFormat(avatarData);
+      // Border/gradient live in PNG tEXt — convert other formats first
+      let workingData: ArrayBuffer | Uint8Array = avatarData;
+      let format = detectImageFormat(workingData);
       if (format === 'unknown') {
         throw new Error('Unsupported avatar image format');
       }
 
+      if (format !== 'png') {
+        const pngData = await convertImageDataToPng(workingData);
+        if (!pngData) {
+          throw new Error('Failed to convert avatar to PNG for style metadata');
+        }
+        workingData = pngData;
+        format = 'png';
+      }
+
       // Get existing metadata to preserve
-      const existingMetadata = extractMetadataFromImage(avatarData);
+      const existingMetadata = extractMetadataFromImage(workingData);
 
       // Merge with new style
       const newMetadata: ImageMetadata = {
@@ -159,7 +171,7 @@ export function useUserProfileStyle(): [
       };
 
       // Embed updated metadata
-      const newAvatarData = embedMetadataInImage(avatarData, newMetadata);
+      const newAvatarData = embedMetadataInImage(workingData, newMetadata);
       if (!newAvatarData) {
         throw new Error('Failed to embed style in avatar metadata');
       }
@@ -167,7 +179,7 @@ export function useUserProfileStyle(): [
       // Upload modified avatar with correct MIME type
       const mimeType = getMimeType(format);
       const extension = getExtension(format);
-      const blob = new Blob([newAvatarData], { type: mimeType });
+      const blob = uint8ArrayToBlob(newAvatarData, mimeType);
 
       const uploadResponse = await mx.uploadContent(blob, {
         name: `avatar.${extension}`,

src/app/paarrot-api.ts

@@ -11,7 +11,14 @@ import { MatrixClient } from 'matrix-js-sdk';
 import { getHomeRoomPath, getDirectRoomPath, getSpaceRoomPath } from './pages/pathUtils';
 import { getCanonicalAliasOrRoomId, isRoomId } from './utils/matrix';
 import { getCallService } from './features/call/useCall';
-import { RoomType, StateEvent } from '../types/matrix/room';
+import {
+  getNotificationType,
+  getUnreadInfo,
+  reactionOrEditEvent,
+  roomHaveNotification,
+  roomHaveUnread,
+} from './utils/room';
+import { MessageEvent, NotificationType, RoomType, StateEvent } from '../types/matrix/room';
 
 /**
  * Global reference to the router navigate function
@@ -120,6 +127,30 @@ export function initPaarrotAPI(matrixClient: MatrixClient) {
           result = await getCurrentRoom(matrixClient);
           break;
 
+        case 'get-messages-groups':
+          result = await getMessagesByScope(matrixClient, 'groups', action.params.limit);
+          break;
+
+        case 'get-messages-dms':
+          result = await getMessagesByScope(matrixClient, 'dms', action.params.limit);
+          break;
+
+        case 'get-messages-combined':
+          result = await getMessagesByScope(matrixClient, 'combined', action.params.limit);
+          break;
+
+        case 'get-unreads-groups':
+          result = await getUnreadsByScope(matrixClient, 'groups');
+          break;
+
+        case 'get-unreads-dms':
+          result = await getUnreadsByScope(matrixClient, 'dms');
+          break;
+
+        case 'get-unreads-combined':
+          result = await getUnreadsByScope(matrixClient, 'combined');
+          break;
+
         default:
           throw new Error(`Unknown action: ${action.action}`);
       }
@@ -410,6 +441,207 @@ async function getCurrentRoom(matrixClient: any) {
   };
 }
 
+const DEFAULT_MESSAGE_LIMIT = 10;
+const MAX_MESSAGE_LIMIT = 100;
+
+type MessageScope = 'groups' | 'dms' | 'combined';
+
+type ApiMessage = {
+  eventId: string;
+  roomId: string;
+  roomName: string;
+  isDirect: boolean;
+  sender: string;
+  senderName: string;
+  timestamp: number;
+  msgtype: string;
+  body: string;
+};
+
+function isDirectRoom(room: any): boolean {
+  return room?.guessDMUserId?.() !== null;
+}
+
+function parseMessageLimit(limit?: number | string): number {
+  const parsedLimit = Number(limit);
+  return Math.min(
+    Math.max(Number.isFinite(parsedLimit) ? Math.floor(parsedLimit) : DEFAULT_MESSAGE_LIMIT, 1),
+    MAX_MESSAGE_LIMIT
+  );
+}
+
+/**
+ * Collect recent room messages from the local live timeline (newest last).
+ * Skips reactions, edits, and redacted events.
+ */
+function collectRecentMessages(room: any, limit: number): ApiMessage[] {
+  const liveEvents = room.getLiveTimeline?.()?.getEvents?.() ?? [];
+  const isDirect = isDirectRoom(room);
+  const roomId = room.roomId;
+  const roomName = room.name || 'Unnamed Room';
+  const messages: ApiMessage[] = [];
+
+  for (let i = liveEvents.length - 1; i >= 0 && messages.length < limit; i -= 1) {
+    const evt = liveEvents[i];
+    if (!evt) continue;
+    if (typeof evt.isRedacted === 'function' && evt.isRedacted()) continue;
+    if (reactionOrEditEvent(evt)) continue;
+
+    const type = evt.getType?.();
+    if (
+      type !== MessageEvent.RoomMessage &&
+      type !== MessageEvent.RoomMessageEncrypted &&
+      type !== MessageEvent.Sticker
+    ) {
+      continue;
+    }
+
+    const content = evt.getContent?.() ?? {};
+    const sender = evt.getSender?.() ?? '';
+    const member = sender ? room.getMember?.(sender) : null;
+
+    if (type === MessageEvent.RoomMessageEncrypted && !content.msgtype) {
+      messages.push({
+        eventId: evt.getId?.() ?? '',
+        roomId,
+        roomName,
+        isDirect,
+        sender,
+        senderName: member?.name ?? sender,
+        timestamp: evt.getTs?.() ?? 0,
+        msgtype: 'm.encrypted',
+        body: '[encrypted]',
+      });
+      continue;
+    }
+
+    messages.push({
+      eventId: evt.getId?.() ?? '',
+      roomId,
+      roomName,
+      isDirect,
+      sender,
+      senderName: member?.name ?? sender,
+      timestamp: evt.getTs?.() ?? 0,
+      msgtype: content.msgtype || (type === MessageEvent.Sticker ? 'm.sticker' : 'm.text'),
+      body: content.body || '',
+    });
+  }
+
+  return messages.reverse();
+}
+
+function getRoomsForScope(matrixClient: any, scope: MessageScope) {
+  const rooms = (matrixClient?.getRooms?.() || []).filter(
+    (room: any) => !isSpaceLikeRoom(room) && room.getMyMembership?.() === 'join'
+  );
+
+  if (scope === 'groups') {
+    return rooms.filter((room: any) => !isDirectRoom(room));
+  }
+  if (scope === 'dms') {
+    return rooms.filter((room: any) => isDirectRoom(room));
+  }
+  return rooms;
+}
+
+/**
+ * Get recent messages across groups, DMs, or both (combined).
+ */
+async function getMessagesByScope(
+  matrixClient: any,
+  scope: MessageScope,
+  limit?: number | string
+) {
+  const limitNum = parseMessageLimit(limit);
+  const rooms = getRoomsForScope(matrixClient, scope);
+
+  const candidates: ApiMessage[] = [];
+  for (const room of rooms) {
+    candidates.push(...collectRecentMessages(room, limitNum));
+  }
+
+  candidates.sort((a, b) => a.timestamp - b.timestamp);
+  const messages = candidates.slice(-limitNum);
+
+  return {
+    scope,
+    limit: limitNum,
+    count: messages.length,
+    messages,
+  };
+}
+
+/**
+ * List unread conversations across groups, DMs, or both (combined).
+ * Uses the same unread rules as the app UI (notification counts + read receipts, muted excluded).
+ */
+async function getUnreadsByScope(matrixClient: any, scope: MessageScope) {
+  const rooms = getRoomsForScope(matrixClient, scope);
+  const unreads: Array<{
+    roomId: string;
+    name: string;
+    isDirect: boolean;
+    avatar: string | null;
+    total: number;
+    highlight: number;
+    latest?: {
+      eventId: string;
+      sender: string;
+      senderName: string;
+      timestamp: number;
+      msgtype: string;
+      body: string;
+    };
+  }> = [];
+
+  for (const room of rooms) {
+    if (getNotificationType(matrixClient, room.roomId) === NotificationType.Mute) {
+      continue;
+    }
+    if (!roomHaveNotification(room) && !roomHaveUnread(matrixClient, room)) {
+      continue;
+    }
+
+    const unreadInfo = getUnreadInfo(room);
+    const latestMessages = collectRecentMessages(room, 1);
+    const latest = latestMessages[0];
+
+    unreads.push({
+      roomId: room.roomId,
+      name: room.name || 'Unnamed Room',
+      isDirect: isDirectRoom(room),
+      avatar: room.getMxcAvatarUrl?.() || null,
+      total: unreadInfo.total,
+      highlight: unreadInfo.highlight,
+      latest: latest
+        ? {
+            eventId: latest.eventId,
+            sender: latest.sender,
+            senderName: latest.senderName,
+            timestamp: latest.timestamp,
+            msgtype: latest.msgtype,
+            body: latest.body,
+          }
+        : undefined,
+    });
+  }
+
+  unreads.sort((a, b) => {
+    const aTs = a.latest?.timestamp ?? 0;
+    const bTs = b.latest?.timestamp ?? 0;
+    if (bTs !== aTs) return bTs - aTs;
+    if (b.highlight !== a.highlight) return b.highlight - a.highlight;
+    return b.total - a.total;
+  });
+
+  return {
+    scope,
+    count: unreads.length,
+    unreads,
+  };
+}
+
 /**
  * Get the currently active room ID
  * Extracts room ID from the current URL pathname

src/app/pages/ThemeManager.tsx

@@ -5,7 +5,7 @@ import {
   LightTheme,
   ThemeContextProvider,
   ThemeKind,
-  useActiveTheme,
+  useDisplayTheme,
   useSystemThemeKind,
 } from '../hooks/useTheme';
 import { useSetting } from '../state/hooks/settings';
@@ -29,21 +29,21 @@ export function UnAuthRouteThemeManager() {
 }
 
 export function AuthRouteThemeManager({ children }: { children: ReactNode }) {
-  const activeTheme = useActiveTheme();
+  const displayTheme = useDisplayTheme();
   const [monochromeMode] = useSetting(settingsAtom, 'monochromeMode');
 
   useEffect(() => {
     document.body.className = '';
     document.body.classList.add(configClass, varsClass);
 
-    document.body.classList.add(...activeTheme.classNames);
+    document.body.classList.add(...displayTheme.classNames);
 
     if (monochromeMode) {
       document.body.style.filter = 'grayscale(1)';
     } else {
       document.body.style.filter = '';
     }
-  }, [activeTheme, monochromeMode]);
+  }, [displayTheme, monochromeMode]);
 
-  return <ThemeContextProvider value={activeTheme}>{children}</ThemeContextProvider>;
+  return <ThemeContextProvider value={displayTheme}>{children}</ThemeContextProvider>;
 }

src/app/pages/client/direct/RoomProvider.tsx

@@ -1,15 +1,19 @@
 import React, { ReactNode } from 'react';
 import { useParams } from 'react-router-dom';
+import { useAtomValue } from 'jotai';
 import { decodeRouteParam } from '../../pathUtils';
 import { useSelectedRoom } from '../../../hooks/router/useSelectedRoom';
 import { IsDirectRoomProvider, RoomProvider } from '../../../hooks/useRoom';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { JoinBeforeNavigate } from '../../../features/join-before-navigate';
 import { useDirectRooms } from './useDirectRooms';
+import { mDirectAtom } from '../../../state/mDirectList';
+import { Membership } from '../../../../types/matrix/room';
 
 export function DirectRouteRoomProvider({ children }: { children: ReactNode }) {
   const mx = useMatrixClient();
   const rooms = useDirectRooms();
+  const mDirects = useAtomValue(mDirectAtom);
 
   const { roomIdOrAlias: rawRoomIdOrAlias, eventId: rawEventId } = useParams();
   const roomIdOrAlias = decodeRouteParam(rawRoomIdOrAlias);
@@ -17,7 +21,13 @@ export function DirectRouteRoomProvider({ children }: { children: ReactNode }) {
   const roomId = useSelectedRoom();
   const room = mx.getRoom(roomId);
 
-  if (!room || !rooms.includes(room.roomId)) {
+  // useDirectRooms can lag m.direct / allRooms during catch-up; allow joined m.direct rooms.
+  const isJoinedDirect =
+    Boolean(room) &&
+    room!.getMyMembership() === Membership.Join &&
+    (rooms.includes(room!.roomId) || mDirects.has(room!.roomId));
+
+  if (!room || !isJoinedDirect) {
     return (
       <JoinBeforeNavigate
         roomIdOrAlias={roomIdOrAlias ?? rawRoomIdOrAlias!}

src/app/pages/client/space/RoomProvider.tsx

@@ -1,4 +1,4 @@
-import React, { ReactNode } from 'react';
+import React, { ReactNode, useEffect } from 'react';
 import { useParams } from 'react-router-dom';
 import { useAtom, useAtomValue } from 'jotai';
 import { decodeRouteParam } from '../../pathUtils';
@@ -30,7 +30,31 @@ export function SpaceRouteRoomProvider({ children }: { children: ReactNode }) {
   const roomId = useSelectedRoom();
   const room = mx.getRoom(roomId);
 
-  if (!room || !allRooms.includes(room.roomId)) {
+  const isJoined = Boolean(room && allRooms.includes(room.roomId));
+  const isSpaceChild = Boolean(room && getSpaceChildren(space).includes(room.roomId));
+  const hasParentMapping = Boolean(
+    room && getAllParents(roomToParents, room.roomId).has(space.roomId)
+  );
+
+  // roomToParents can lag behind live space state during catch-up sync.
+  // If the room is clearly a child of this space, backfill the map and open it.
+  useEffect(() => {
+    if (!room || !isJoined || hasParentMapping || !isSpaceChild) return;
+    setRoomToParents({
+      type: 'PUT',
+      parent: space.roomId,
+      children: [room.roomId],
+    });
+  }, [
+    room,
+    isJoined,
+    hasParentMapping,
+    isSpaceChild,
+    space.roomId,
+    setRoomToParents,
+  ]);
+
+  if (!room || !isJoined) {
     // room is not joined
     return (
       <JoinBeforeNavigate
@@ -50,16 +74,7 @@ export function SpaceRouteRoomProvider({ children }: { children: ReactNode }) {
     );
   }
 
-  if (!getAllParents(roomToParents, room.roomId).has(space.roomId)) {
-    if (getSpaceChildren(space).includes(room.roomId)) {
-      // fill missing roomToParent mapping
-      setRoomToParents({
-        type: 'PUT',
-        parent: space.roomId,
-        children: [room.roomId],
-      });
-    }
-
+  if (!hasParentMapping && !isSpaceChild) {
     return (
       <JoinBeforeNavigate
         roomIdOrAlias={roomIdOrAlias ?? rawRoomIdOrAlias!}

src/app/plugins/react-custom-html-parser.tsx

@@ -188,7 +188,7 @@ export const scaleSystemEmoji = (text: string): (string | JSX.Element)[] =>
     text,
     EMOJI_REG_G,
     (match, pushIndex) => (
-      <span key={`scaleSystemEmoji-${pushIndex}`} className={css.EmoticonBase}>
+      <span key={`scaleSystemEmoji-${pushIndex}`} className={css.EmoticonBase} data-emoticon={match[0]}>
         <span className={css.Emoticon()} title={getShortcodeFor(getHexcodeForEmoji(match[0]))}>
           {match[0]}
         </span>
@@ -551,8 +551,15 @@ export const getReactCustomHtmlParser = (
             );
           }
           if (htmlSrc && 'data-mx-emoticon' in props) {
+            const emoticonLabel =
+              (typeof props.alt === 'string' && props.alt) ||
+              (typeof props.title === 'string' && props.title) ||
+              undefined;
             return (
-              <span className={css.EmoticonBase}>
+              <span
+                className={css.EmoticonBase}
+                {...(emoticonLabel ? { 'data-emoticon': emoticonLabel } : {})}
+              >
                 <span className={css.Emoticon()}>
                   <AuthenticatedImg {...props} className={css.EmoticonImg} src={htmlSrc} />
                 </span>

src/app/state/room/roomToParents.ts

@@ -103,6 +103,23 @@ export const useBindRoomToParentsAtom = (
             setRoomToParents({ type: 'DELETE', roomId: childId });
           }
         }
+        return;
+      }
+
+      // Create type can arrive after the room is already in the store. Without this,
+      // spaces are skipped on INITIALIZE (isSpace false) and children stay unmapped
+      // until an unrelated SpaceChild event fires — DMs/channels look listed but
+      // SpaceRouteRoomProvider blocks on missing roomToParents.
+      if (mEvent.getType() === StateEvent.RoomCreate) {
+        const roomId = mEvent.getRoomId();
+        const room = roomId ? mx.getRoom(roomId) : null;
+        if (room && isSpace(room) && room.getMyMembership() !== Membership.Invite) {
+          setRoomToParents({
+            type: 'PUT',
+            parent: room.roomId,
+            children: getSpaceChildren(room),
+          });
+        }
       }
     };
 

src/app/utils/backgroundSync.ts

@@ -15,6 +15,9 @@ type UnifiedPushStatus = {
   registered: boolean;
   distributor: string;
   distributors: string[] | string;
+  lastFailure?: string;
+  /** OEM App Boot / AUTO_START is blocking distributor broadcasts (e.g. TCL). */
+  autoStartBlocked?: boolean;
 };
 
 type UnifiedPushEndpointEvent = {
@@ -55,6 +58,8 @@ interface MatrixBackgroundSyncPlugin {
   setAppForeground(options: { foreground: boolean }): Promise<void>;
   /** Returns fetch state and current UnifiedPush registration details. */
   getStatus(): Promise<UnifiedPushStatus>;
+  /** Native Matrix gateway discovery for a UnifiedPush endpoint (avoids WebView CORS). */
+  resolveUnifiedPushGateway(options: { endpoint: string }): Promise<{ gatewayUrl: string }>;
   addListener(
     eventName: 'unifiedPushNewEndpoint',
     listenerFunc: (event: UnifiedPushEndpointEvent) => void
@@ -141,6 +146,17 @@ const normalizeDistributors = (raw: UnifiedPushStatus['distributors']): string[]
 };
 
 const resolveUnifiedPushGateway = async (endpoint: string): Promise<string> => {
+  // Prefer native HTTP — ntfy/Matrix gateway responses omit CORS headers, so
+  // WebView fetch fails with TypeError: Failed to fetch and wrongly falls back.
+  try {
+    const { registerPlugin } = await loadCapacitorCore();
+    const MatrixBackgroundSync = registerPlugin<MatrixBackgroundSyncPlugin>('MatrixBackgroundSync');
+    const result = await MatrixBackgroundSync.resolveUnifiedPushGateway({ endpoint });
+    if (result?.gatewayUrl) return result.gatewayUrl;
+  } catch (err) {
+    console.warn('[BackgroundSync] Native UnifiedPush gateway discovery failed:', err);
+  }
+
   try {
     const discoveryUrl = new URL(endpoint);
     discoveryUrl.pathname = '/_matrix/push/v1/notify';
@@ -529,7 +545,23 @@ export const requestResetPushRegistration = async (): Promise<{ success: boolean
     const MatrixBackgroundSync = registerPlugin<MatrixBackgroundSyncPlugin>('MatrixBackgroundSync');
     const result = await MatrixBackgroundSync.requestDistributorSetup();
     console.log('[BackgroundSync] requestDistributorSetup completed:', result);
-    return result ?? { success: false };
+    if (!result?.success) return { success: false };
+
+    // Endpoint arrives asynchronously from the distributor after register().
+    for (let i = 0; i < 40; i += 1) {
+      await new Promise((resolve) => setTimeout(resolve, 250));
+      const status = await getBackgroundSyncStatus();
+      if (status?.registered && status.endpoint) {
+        return { success: true };
+      }
+      if (status?.lastFailure) {
+        console.warn('[BackgroundSync] Registration failed while waiting:', status.lastFailure);
+        return { success: false };
+      }
+    }
+
+    console.warn('[BackgroundSync] Distributor selected but no endpoint received in time');
+    return { success: false };
   } catch (err) {
     console.error('[BackgroundSync] requestDistributorSetup failed:', err);
     return { success: false };

src/app/utils/imageMetadata.ts

@@ -258,6 +258,59 @@ export function embedColorInImage(imageData: ArrayBuffer | Uint8Array, color: st
   }
 }
 
+/**
+ * True when metadata includes fields that only PNG tEXt chunks can store.
+ */
+export function needsPngForMetadata(metadata: ImageMetadata): boolean {
+  return Boolean(metadata.banner || metadata.avatarBorderColor || metadata.gradient);
+}
+
+/**
+ * Convert image data to PNG via canvas (needed for banner/border/gradient metadata).
+ */
+export async function convertImageDataToPng(
+  imageData: ArrayBuffer | Uint8Array
+): Promise<Uint8Array | null> {
+  const bytes = imageData instanceof Uint8Array ? imageData : new Uint8Array(imageData);
+  const format = detectImageFormat(bytes);
+  if (format === 'png') return bytes;
+  if (format === 'unknown') return null;
+
+  try {
+    const blob = uint8ArrayToBlob(bytes, getMimeType(format));
+    const bitmap = await createImageBitmap(blob);
+    try {
+      const canvas = document.createElement('canvas');
+      canvas.width = bitmap.width;
+      canvas.height = bitmap.height;
+      const ctx = canvas.getContext('2d');
+      if (!ctx) return null;
+      ctx.drawImage(bitmap, 0, 0);
+
+      const pngBlob = await new Promise<Blob | null>((resolve) => {
+        canvas.toBlob(resolve, 'image/png');
+      });
+      if (!pngBlob) return null;
+      return new Uint8Array(await pngBlob.arrayBuffer());
+    } finally {
+      bitmap.close();
+    }
+  } catch (error) {
+    console.error('[convertImageDataToPng] Conversion failed:', error);
+    return null;
+  }
+}
+
+/**
+ * Build a Blob from Uint8Array without relying on BufferSource/BlobPart quirks
+ * across TS DOM lib / Electron versions (avoids SharedArrayBuffer typing issues).
+ */
+export function uint8ArrayToBlob(data: Uint8Array, type: string): Blob {
+  const copy = new ArrayBuffer(data.byteLength);
+  new Uint8Array(copy).set(data);
+  return new Blob([copy], { type });
+}
+
 /**
  * Embed paarrot metadata (color and/or banner) into image data
  * Preserves existing metadata that is not being updated
@@ -270,18 +323,27 @@ export function embedMetadataInImage(
   metadata: ImageMetadata
 ): Uint8Array | null {
   const format = detectImageFormat(imageData);
-  
+  const bytes = imageData instanceof Uint8Array ? imageData : new Uint8Array(imageData);
+
   switch (format) {
     case 'png':
       return embedMetadataInPNG(imageData, metadata);
-    // For other formats, only embed color for now
+    // Non-PNG: color via format-specific chunks; banner/border/gradient need PNG (convert first)
     case 'webp':
     case 'jpeg':
     case 'gif':
+      if (needsPngForMetadata(metadata)) {
+        console.warn(
+          '[embedMetadataInImage] Banner/border/gradient require PNG; convert with convertImageDataToPng first. Got:',
+          format
+        );
+        return null;
+      }
       if (metadata.color) {
         return embedColorInImage(imageData, metadata.color);
       }
-      return null;
+      // Supported format with nothing to embed — succeed as a no-op so avatar upload isn't blocked
+      return bytes;
     default:
       console.warn('[embedMetadataInImage] Unknown image format, cannot embed metadata');
       return null;

src/app/utils/room.ts

@@ -24,6 +24,7 @@ import {
   Membership,
   MessageEvent,
   NotificationType,
+  PaarrotUiContent,
   RoomToParents,
   RoomType,
   StateEvent,
@@ -125,6 +126,33 @@ export const getPaarrotRoomKind = (room: Room | null): string | undefined => {
   return typeof kind === 'string' ? kind : undefined;
 };
 
+/**
+ * Valid bot-driven room UI state (im.paarrot.ui with version + root node).
+ */
+export const parsePaarrotUiContent = (raw: unknown): PaarrotUiContent | undefined => {
+  if (!raw || typeof raw !== 'object') return undefined;
+  const content = raw as PaarrotUiContent;
+  if (
+    typeof content.version !== 'number' ||
+    !content.root ||
+    typeof content.root !== 'object' ||
+    typeof content.root.type !== 'string' ||
+    typeof content.root.id !== 'string'
+  ) {
+    return undefined;
+  }
+  return content;
+};
+
+export const getPaarrotUiContent = (room: Room | null): PaarrotUiContent | undefined => {
+  if (!room) return undefined;
+  const event = room.currentState?.getStateEvents(StateEvent.PaarrotUi, '');
+  if (!event) return undefined;
+  return parsePaarrotUiContent(event.getContent());
+};
+
+export const hasRoomAppUi = (room: Room | null): boolean => getPaarrotUiContent(room) !== undefined;
+
 /**
  * m.forum space root (forum board lobby), not a plain m.space or a lone m.forum topic channel.
  * Matrix sets create type m.forum on forum spaces but SDK isSpaceRoom() is often still false;

src/app/utils/tauri.ts

@@ -534,12 +534,20 @@ export const readClipboardImage = async (): Promise<File | null> => {
     try {
       const electron = (window as any).electron;
       if (electron?.clipboard?.readImage) {
-        const dataUrl = await electron.clipboard.readImage();
+        const result = await electron.clipboard.readImage();
+        // IPC may return a data URL string or { success, data } depending on path.
+        const dataUrl =
+          typeof result === 'string'
+            ? result
+            : result && typeof result === 'object' && typeof result.data === 'string'
+              ? result.data
+              : null;
         if (!dataUrl) return null;
         
         // Convert data URL to File
         const response = await fetch(dataUrl);
         const blob = await response.blob();
+        if (blob.size < 32) return null;
         return new File([blob], 'clipboard-image.png', { type: 'image/png' });
       }
     } catch (err) {
@@ -559,6 +567,7 @@ export const readClipboardImage = async (): Promise<File | null> => {
       // Convert data URL to File
       const response = await fetch(dataUrl);
       const blob = await response.blob();
+      if (blob.size < 32) return null;
       return new File([blob], 'clipboard-image.png', { type: 'image/png' });
     } catch (err) {
       console.warn('Failed to read Tauri clipboard image:', err);

src/index.css

@@ -887,6 +887,12 @@ body.stationery-dark-theme {
   width: calc(100% + 25px) !important;
   max-width: none !important;
   box-sizing: border-box !important;
+  /* Gutter is only for post-it overflow paint — do not steal clicks from page-nav */
+  pointer-events: none;
+}
+
+.stationery [data-sidebar-scroll] > * {
+  pointer-events: auto;
 }
 
 .stationery [data-sidebar] > *,

src/playground/App.tsx

@@ -0,0 +1,365 @@
+import { useDeferredValue, useEffect, useMemo, useState, useTransition } from 'react';
+import Editor, { loader } from '@monaco-editor/react';
+import * as monaco from 'monaco-editor';
+import './monacoSetup';
+import { getCatalog, harnessForModule, type CatalogEntry } from './catalog';
+import { DEFAULT_SOURCE } from './defaultSource';
+import { loadManualSession, type ManualSessionInput } from './liveClient';
+import { PlaygroundProviders } from './mocks/PlaygroundProviders';
+import { PreviewErrorBoundary } from './PreviewErrorBoundary';
+import { ResizableStage } from './ResizableStage';
+import { LivePreview } from './LivePreview';
+import { usePlaygroundMatrix } from './usePlaygroundMatrix';
+
+// Use the npm monaco build — the CDN AMD loader breaks UMD deps like sanitize-html.
+loader.config({ monaco });
+
+type EditorTab = 'component' | 'harness';
+
+async function pushLiveSource(source: string) {
+  await fetch('/__playground/live', {
+    method: 'POST',
+    headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+    body: source,
+  });
+}
+
+async function fetchComponentSource(filePath: string): Promise<string> {
+  const res = await fetch(`/__playground/source?path=${encodeURIComponent(filePath)}`);
+  if (!res.ok) throw new Error(`Failed to load ${filePath}: ${res.status}`);
+  return res.text();
+}
+
+async function pushComponentSource(filePath: string, source: string) {
+  await fetch(`/__playground/source?path=${encodeURIComponent(filePath)}`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+    body: source,
+  });
+}
+
+export function App() {
+  const catalog = useMemo(() => getCatalog(), []);
+  const [filter, setFilter] = useState('');
+  const [harnessSource, setHarnessSource] = useState(DEFAULT_SOURCE);
+  const [componentSource, setComponentSource] = useState<string>('');
+  const [editorTab, setEditorTab] = useState<EditorTab>('harness');
+  const [selected, setSelected] = useState<CatalogEntry | null>(null);
+  const [loadError, setLoadError] = useState<string | null>(null);
+  const [showTokenForm, setShowTokenForm] = useState(false);
+  const [manual, setManual] = useState<ManualSessionInput>(() => {
+    const saved = loadManualSession();
+    return (
+      saved ?? {
+        baseUrl: 'https://matrix.org',
+        userId: '@you:matrix.org',
+        deviceId: 'PLAYGROUND',
+        accessToken: '',
+      }
+    );
+  });
+  const deferredHarness = useDeferredValue(harnessSource);
+  const deferredComponent = useDeferredValue(componentSource);
+  const [, startTransition] = useTransition();
+  const matrix = usePlaygroundMatrix();
+
+  useEffect(() => {
+    fetch('/__playground/live')
+      .then((r) => r.text())
+      .then((text) => {
+        if (text.trim()) setHarnessSource(text);
+      })
+      .catch(() => undefined);
+  }, []);
+
+  useEffect(() => {
+    const handle = window.setTimeout(() => {
+      void pushLiveSource(deferredHarness);
+    }, 250);
+    return () => window.clearTimeout(handle);
+  }, [deferredHarness]);
+
+  // Upgrade stale RoomInput harness (bare <RoomInput /> or mocks.room) to useRoom().
+  useEffect(() => {
+    if (!selected?.importPath.endsWith('/RoomInput')) return;
+    if (harnessSource.includes('useRoom()')) return;
+    setHarnessSource(harnessForModule(selected.importPath));
+  }, [selected, harnessSource]);
+
+  // Writes the real component file — strings/markup edits land in src/app/…
+  useEffect(() => {
+    if (!selected || editorTab !== 'component') return;
+    if (!deferredComponent) return;
+    const handle = window.setTimeout(() => {
+      void pushComponentSource(selected.filePath, deferredComponent).catch((err) => {
+        setLoadError(err instanceof Error ? err.message : String(err));
+      });
+    }, 400);
+    return () => window.clearTimeout(handle);
+  }, [deferredComponent, editorTab, selected]);
+
+  const filtered = useMemo(() => {
+    const q = filter.trim().toLowerCase();
+    if (!q) return catalog;
+    return catalog.filter((e) => e.label.toLowerCase().includes(q));
+  }, [catalog, filter]);
+
+  const openEntry = (entry: CatalogEntry) => {
+    setSelected(entry);
+    setLoadError(null);
+    setEditorTab('component');
+    startTransition(() => {
+      setHarnessSource(harnessForModule(entry.importPath));
+    });
+    void fetchComponentSource(entry.filePath)
+      .then((text) => setComponentSource(text))
+      .catch((err) => {
+        setComponentSource('');
+        setLoadError(err instanceof Error ? err.message : String(err));
+      });
+  };
+
+  const liveReady = matrix.mode === 'live' && matrix.status === 'ready' && matrix.client;
+  const previewClient = liveReady ? matrix.client! : undefined;
+  const previewRoom = liveReady ? matrix.room ?? undefined : undefined;
+
+  const editorValue = editorTab === 'component' ? componentSource : harnessSource;
+  const editorPath =
+    editorTab === 'component' && selected
+      ? selected.filePath
+      : 'playground-live.tsx';
+
+  return (
+    <div className="app">
+      <header className="topbar">
+        <div>
+          <strong>Component Playground</strong>
+          <span className="muted">
+            {' '}
+            — Component tab edits real source · Harness tab only mounts it
+          </span>
+        </div>
+        <div className="topbar-actions">
+          <button
+            type="button"
+            className="ghost"
+            onClick={() => {
+              setSelected(null);
+              setComponentSource('');
+              setEditorTab('harness');
+              setHarnessSource(DEFAULT_SOURCE);
+            }}
+          >
+            Reset message preview
+          </button>
+        </div>
+      </header>
+
+      <div className="conn-bar">
+        <div className="conn-modes">
+          <button
+            type="button"
+            className={matrix.mode === 'mock' ? 'conn-btn active' : 'conn-btn'}
+            onClick={() => matrix.useMocks()}
+          >
+            Mocks
+          </button>
+          <button
+            type="button"
+            className={matrix.mode === 'live' ? 'conn-btn active' : 'conn-btn'}
+            disabled={matrix.status === 'connecting'}
+            onClick={() => {
+              void matrix.connectLive();
+            }}
+            title={
+              matrix.hasPaarrotSession
+                ? `Use logged-in session ${matrix.paarrotUserId}`
+                : 'Needs Paarrot login on this origin, or a pasted token'
+            }
+          >
+            {matrix.status === 'connecting' ? 'Connecting…' : 'Paarrot session'}
+          </button>
+          <button
+            type="button"
+            className="conn-btn"
+            onClick={() => setShowTokenForm((v) => !v)}
+          >
+            Token…
+          </button>
+        </div>
+
+        <div className="conn-status">
+          {matrix.mode === 'mock' && <span className="muted">Using lightweight mocks</span>}
+          {matrix.mode === 'live' && matrix.status === 'connecting' && (
+            <span className="muted">Syncing (memory store, no crypto)…</span>
+          )}
+          {matrix.mode === 'live' && matrix.status === 'ready' && (
+            <span className="conn-ok">{matrix.sessionLabel}</span>
+          )}
+          {matrix.mode === 'live' && matrix.status === 'error' && (
+            <span className="conn-err">{matrix.error}</span>
+          )}
+          {!matrix.hasPaarrotSession && matrix.mode !== 'live' && (
+            <span className="muted">Tip: log into Paarrot at / first, then hit Paarrot session</span>
+          )}
+        </div>
+
+        {liveReady && matrix.rooms.length > 0 && (
+          <label className="conn-room">
+            Room
+            <select
+              value={matrix.room?.roomId ?? ''}
+              onChange={(e) => matrix.selectRoom(e.target.value)}
+            >
+              {matrix.rooms.map((r) => (
+                <option key={r.roomId} value={r.roomId}>
+                  {r.name || r.roomId}
+                </option>
+              ))}
+            </select>
+          </label>
+        )}
+      </div>
+
+      {showTokenForm && (
+        <form
+          className="token-form"
+          onSubmit={(e) => {
+            e.preventDefault();
+            setShowTokenForm(false);
+            void matrix.connectLive(manual);
+          }}
+        >
+          <input
+            placeholder="Homeserver URL"
+            value={manual.baseUrl}
+            onChange={(e) => setManual((m) => ({ ...m, baseUrl: e.target.value }))}
+          />
+          <input
+            placeholder="@user:server"
+            value={manual.userId}
+            onChange={(e) => setManual((m) => ({ ...m, userId: e.target.value }))}
+          />
+          <input
+            placeholder="Device ID"
+            value={manual.deviceId}
+            onChange={(e) => setManual((m) => ({ ...m, deviceId: e.target.value }))}
+          />
+          <input
+            placeholder="Access token"
+            value={manual.accessToken}
+            onChange={(e) => setManual((m) => ({ ...m, accessToken: e.target.value }))}
+          />
+          <button type="submit" className="ghost">
+            Connect
+          </button>
+        </form>
+      )}
+
+      <div className="panes">
+        <aside className="pane catalog-pane">
+          <div className="pane-label">Cinny modules ({filtered.length})</div>
+          <input
+            className="filter"
+            placeholder="Filter components…"
+            value={filter}
+            onChange={(e) => setFilter(e.target.value)}
+          />
+          <div className="catalog-list">
+            {filtered.map((entry) => (
+              <button
+                key={entry.id}
+                type="button"
+                className={selected?.id === entry.id ? 'catalog-item active' : 'catalog-item'}
+                onClick={() => openEntry(entry)}
+                title={entry.filePath}
+              >
+                {entry.label}
+              </button>
+            ))}
+          </div>
+        </aside>
+
+        <section className="pane editor-pane">
+          <div className="pane-label editor-tabs">
+            <button
+              type="button"
+              className={editorTab === 'component' ? 'tab active' : 'tab'}
+              disabled={!selected}
+              onClick={() => setEditorTab('component')}
+              title={selected ? `Edit ${selected.filePath}` : 'Pick a module first'}
+            >
+              Component
+            </button>
+            <button
+              type="button"
+              className={editorTab === 'harness' ? 'tab active' : 'tab'}
+              onClick={() => setEditorTab('harness')}
+            >
+              Harness
+            </button>
+            <span className="muted tab-hint">
+              {editorTab === 'component' && selected
+                ? `writes ${selected.filePath}`
+                : 'mount-only · not saved'}
+            </span>
+          </div>
+          {loadError && <pre className="error-block editor-error">{loadError}</pre>}
+          <Editor
+            height="100%"
+            defaultLanguage="typescript"
+            path={editorPath}
+            theme="vs-dark"
+            value={editorValue}
+            onChange={(value) => {
+              const next = value ?? '';
+              if (editorTab === 'component') setComponentSource(next);
+              else setHarnessSource(next);
+            }}
+            options={{
+              minimap: { enabled: false },
+              fontSize: 13,
+              fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Consolas, monospace',
+              scrollBeyondLastLine: false,
+              wordWrap: 'on',
+              tabSize: 2,
+              automaticLayout: true,
+              padding: { top: 12 },
+              readOnly: editorTab === 'component' && !selected,
+            }}
+            beforeMount={(monaco) => {
+              monaco.languages.typescript.typescriptDefaults.setCompilerOptions({
+                jsx: monaco.languages.typescript.JsxEmit.ReactJSX,
+                target: monaco.languages.typescript.ScriptTarget.ES2020,
+                allowNonTsExtensions: true,
+                esModuleInterop: true,
+                moduleResolution: monaco.languages.typescript.ModuleResolutionKind.NodeJs,
+                paths: {
+                  '@cinny/*': ['*'],
+                  '@playground/mocks': ['*'],
+                },
+              });
+              monaco.languages.typescript.typescriptDefaults.setDiagnosticsOptions({
+                noSemanticValidation: true,
+                noSyntaxValidation: false,
+              });
+            }}
+          />
+        </section>
+
+        <section className="pane preview-pane">
+          <div className="pane-label">Preview</div>
+          <div className="preview-body">
+            <ResizableStage>
+              <PlaygroundProviders client={previewClient} room={previewRoom}>
+                <PreviewErrorBoundary resetKey={`${deferredHarness}:${selected?.filePath ?? ''}`}>
+                  <LivePreview />
+                </PreviewErrorBoundary>
+              </PlaygroundProviders>
+            </ResizableStage>
+          </div>
+        </section>
+      </div>
+    </div>
+  );
+}

src/playground/LivePreview.tsx

@@ -0,0 +1,59 @@
+import { useEffect, useState } from 'react';
+
+/**
+ * Dynamically remounts the Vite virtual live module when the harness changes.
+ */
+export function LivePreview() {
+  const [revision, setRevision] = useState(0);
+  const [Comp, setComp] = useState<React.ComponentType | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    const onUpdate = () => setRevision((n) => n + 1);
+    const handler = () => onUpdate();
+
+    // Vite custom event from liveTsxPlugin
+    if (import.meta.hot) {
+      import.meta.hot.on('playground:live-updated', handler);
+    }
+
+    return () => {
+      if (import.meta.hot) {
+        import.meta.hot.off('playground:live-updated', handler);
+      }
+    };
+  }, []);
+
+  useEffect(() => {
+    let cancelled = false;
+    setError(null);
+    setComp(null);
+
+    import(/* @vite-ignore */ `/@playground/live.tsx?t=${revision}`)
+      .then((mod) => {
+        if (cancelled) return;
+        const candidate = mod.default;
+        if (typeof candidate !== 'function') {
+          setError('Live module must `export default` a React component.');
+          return;
+        }
+        setComp(() => candidate);
+      })
+      .catch((err: unknown) => {
+        if (cancelled) return;
+        const message =
+          err instanceof Error
+            ? `${err.message}\n\n${err.stack ?? ''}`
+            : String(err);
+        setError(message);
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [revision]);
+
+  if (error) return <pre className="error-block">{error}</pre>;
+  if (!Comp) return <div className="muted">Compiling harness…</div>;
+  return <Comp />;
+}

src/playground/PreviewErrorBoundary.tsx

@@ -0,0 +1,40 @@
+import React, { Component, type ErrorInfo, type ReactNode } from 'react';
+
+type Props = {
+  resetKey: string;
+  children: ReactNode;
+};
+
+type State = {
+  error: string | null;
+};
+
+export class PreviewErrorBoundary extends Component<Props, State> {
+  state: State = { error: null };
+
+  static getDerivedStateFromError(error: Error): State {
+    return {
+      error: `${error.message}\n\n${error.stack ?? ''}`,
+    };
+  }
+
+  componentDidCatch(error: Error, info: ErrorInfo) {
+    console.error('[playground preview]', error, info);
+    this.setState({
+      error: `${error.message}\n\n${error.stack ?? ''}\n\n${info.componentStack ?? ''}`,
+    });
+  }
+
+  componentDidUpdate(prevProps: Props) {
+    if (prevProps.resetKey !== this.props.resetKey && this.state.error) {
+      this.setState({ error: null });
+    }
+  }
+
+  render() {
+    if (this.state.error) {
+      return <pre className="error-block">{this.state.error}</pre>;
+    }
+    return this.props.children;
+  }
+}

src/playground/ResizableStage.tsx

@@ -0,0 +1,86 @@
+import { useCallback, useEffect, useRef, useState, type CSSProperties } from 'react';
+
+type Props = {
+  children: React.ReactNode;
+};
+
+const MIN = 160;
+const MAX = 1200;
+
+export function ResizableStage({ children }: Props) {
+  const [size, setSize] = useState({ width: 520, height: 480 });
+  const dragRef = useRef<{
+    edge: 'e' | 's' | 'se';
+    startX: number;
+    startY: number;
+    startW: number;
+    startH: number;
+  } | null>(null);
+
+  const onPointerMove = useCallback((e: PointerEvent) => {
+    const drag = dragRef.current;
+    if (!drag) return;
+    const dx = e.clientX - drag.startX;
+    const dy = e.clientY - drag.startY;
+    setSize((prev) => {
+      let width = prev.width;
+      let height = prev.height;
+      if (drag.edge === 'e' || drag.edge === 'se') {
+        width = clamp(drag.startW + dx, MIN, MAX);
+      }
+      if (drag.edge === 's' || drag.edge === 'se') {
+        height = clamp(drag.startH + dy, MIN, MAX);
+      }
+      return { width, height };
+    });
+  }, []);
+
+  const onPointerUp = useCallback(() => {
+    dragRef.current = null;
+    window.removeEventListener('pointermove', onPointerMove);
+    window.removeEventListener('pointerup', onPointerUp);
+  }, [onPointerMove]);
+
+  const startDrag = (edge: 'e' | 's' | 'se') => (e: React.PointerEvent) => {
+    e.preventDefault();
+    dragRef.current = {
+      edge,
+      startX: e.clientX,
+      startY: e.clientY,
+      startW: size.width,
+      startH: size.height,
+    };
+    window.addEventListener('pointermove', onPointerMove);
+    window.addEventListener('pointerup', onPointerUp);
+  };
+
+  useEffect(() => () => onPointerUp(), [onPointerUp]);
+
+  const stageStyle: CSSProperties = {
+    width: size.width,
+    height: size.height,
+  };
+
+  return (
+    <div className="stage-wrap">
+      <div className="stage-meta">
+        {size.width} × {size.height}
+      </div>
+      <div className="stage" style={stageStyle}>
+        <div className="stage-canvas">{children}</div>
+        <button type="button" className="handle handle-e" aria-label="Resize width" onPointerDown={startDrag('e')} />
+        <button type="button" className="handle handle-s" aria-label="Resize height" onPointerDown={startDrag('s')} />
+        <button
+          type="button"
+          className="handle handle-se"
+          aria-label="Resize both"
+          onPointerDown={startDrag('se')}
+        />
+      </div>
+    </div>
+  );
+}
+
+function clamp(n: number, min: number, max: number) {
+  return Math.min(max, Math.max(min, n));
+}

src/playground/catalog.ts

@@ -0,0 +1,128 @@
+/**
+ * Path list of Cinny UI modules the playground can open.
+ */
+const componentModules = import.meta.glob(
+  [
+    '../app/components/**/*.{tsx,ts}',
+    '../app/features/**/*.{tsx,ts}',
+  ],
+  { eager: false }
+);
+
+export type CatalogEntry = {
+  id: string;
+  label: string;
+  importPath: string;
+  /** Path under cinny/, e.g. src/app/components/.../Foo.tsx */
+  filePath: string;
+};
+
+function toFilePath(viteKey: string): string | null {
+  const normalized = viteKey.replace(/\\/g, '/');
+  let rel = normalized;
+  const appIdx = rel.indexOf('/app/');
+  if (appIdx !== -1) {
+    rel = `src${rel.slice(appIdx)}`;
+  } else if (rel.startsWith('../app/')) {
+    rel = `src/${rel.slice('../'.length)}`;
+  } else if (rel.startsWith('../')) {
+    rel = `src/app/${rel.slice('../'.length)}`;
+  } else {
+    return null;
+  }
+  if (!/\.(tsx|ts)$/.test(rel)) return null;
+  return rel;
+}
+
+function toImportPath(viteKey: string): string | null {
+  const normalized = viteKey.replace(/\\/g, '/');
+  let rel = normalized;
+  const appIdx = rel.indexOf('/app/');
+  if (appIdx !== -1) {
+    rel = rel.slice(appIdx + '/app/'.length);
+  } else if (rel.startsWith('../')) {
+    rel = rel.replace(/^\.\.\//, '');
+  }
+  rel = rel.replace(/\.(tsx|ts)$/, '');
+  if (rel.endsWith('.css') || rel.includes('.css')) return null;
+  return `@cinny/app/${rel}`;
+}
+
+function toLabel(importPath: string): string {
+  return importPath.replace(/^@cinny\//, '');
+}
+
+export function getCatalog(): CatalogEntry[] {
+  const entries: CatalogEntry[] = [];
+  for (const key of Object.keys(componentModules)) {
+    if (/\.css(\.ts)?$/.test(key)) continue;
+    if (/\.test\./.test(key) || /\.spec\./.test(key)) continue;
+    // Prefer UI modules — plain .ts files are usually helpers/hooks, not preview targets.
+    if (key.endsWith('.ts') && !key.endsWith('.tsx')) continue;
+    const importPath = toImportPath(key);
+    const filePath = toFilePath(key);
+    if (!importPath || !filePath) continue;
+    entries.push({
+      id: key,
+      label: toLabel(importPath),
+      importPath,
+      filePath,
+    });
+  }
+  return entries.sort((a, b) => a.label.localeCompare(b.label));
+}
+
+/**
+ * Generated harness source. Prefer a clean named import the user can edit.
+ */
+export function harnessForModule(importPath: string): string {
+  const nameGuess =
+    importPath
+      .split('/')
+      .pop()
+      ?.replace(/[^a-zA-Z0-9_$]/g, '') || 'Component';
+
+  if (nameGuess === 'RoomInput') {
+    return `/**
+ * Preview harness for ${importPath}
+ *
+ * Uses the room from PlaygroundProviders (mock or live Paarrot session).
+ * Switch to the Component tab to edit the real source.
+ */
+import { useRef } from 'react';
+import { RoomInput } from '${importPath}';
+import { useEditor } from '@cinny/app/components/editor';
+import { useRoom } from '@cinny/app/hooks/useRoom';
+
+export default function Preview() {
+  const editor = useEditor();
+  const dropRef = useRef<HTMLDivElement>(null);
+  const room = useRoom();
+
+  return (
+    <div ref={dropRef} style={{ width: '100%' }}>
+      <RoomInput
+        editor={editor}
+        fileDropContainerRef={dropRef}
+        roomId={room.roomId}
+        room={room}
+      />
+    </div>
+  );
+}
+`;
+  }
+
+  return `/**
+ * Preview harness for ${importPath}
+ *
+ * This only mounts the component. To edit labels/strings/markup, switch to the
+ * Component tab (writes the real source file under src/app/…).
+ */
+import { ${nameGuess} } from '${importPath}';
+
+export default function Preview() {
+  return <${nameGuess} />;
+}
+`;
+}

src/playground/defaultLive.tsx

@@ -0,0 +1,43 @@
+/**
+ * Live preview harness — edit freely. Nothing is saved.
+ *
+ * - Import any Cinny module via `@cinny/...`
+ * - Use mocks / PlaygroundProviders from `@playground/mocks`
+ * - `export default` the component to render in the stage
+ */
+import { Message } from '@cinny/app/features/room/message';
+import { MessageLayout } from '@cinny/app/state/settings';
+import { Box, Text } from 'folds';
+import { mocks } from '@playground/mocks';
+
+export default function Preview() {
+  const room = mocks.room;
+  const mEvent = mocks.event;
+
+  return (
+    <Box direction="Column" gap="200" style={{ width: '100%', maxWidth: 520 }}>
+      <Text size="T200" priority="300">
+        Preview harness — swap imports to any `@cinny/...` export
+      </Text>
+      <Message
+        room={room}
+        mEvent={mEvent}
+        collapse={false}
+        highlight={false}
+        messageLayout={MessageLayout.Modern}
+        messageSpacing="400"
+        canDelete
+        canSendReaction
+        canPinEvent
+        hour24Clock={false}
+        dateFormatString="D MMM YYYY"
+        onUserClick={() => undefined}
+        onUsernameClick={() => undefined}
+        onReplyClick={() => undefined}
+        onReactionToggle={() => undefined}
+      >
+        <Text style={{ margin: 0 }}>{mEvent.getContent().body}</Text>
+      </Message>
+    </Box>
+  );
+}

src/playground/defaultSource.ts

@@ -0,0 +1,3 @@
+import defaultLive from './defaultLive.tsx?raw';
+
+export const DEFAULT_SOURCE = defaultLive;

src/playground/liveClient.ts

@@ -0,0 +1,151 @@
+import {
+  ClientEvent,
+  createClient,
+  MemoryStore,
+  SyncState,
+  type MatrixClient,
+  type Room,
+} from 'matrix-js-sdk';
+import { getCurrentSession, type Session } from '@cinny/app/state/sessions';
+
+export type LiveConnectMode = 'mock' | 'live';
+
+export type ManualSessionInput = {
+  baseUrl: string;
+  userId: string;
+  deviceId: string;
+  accessToken: string;
+};
+
+const MANUAL_SESSION_KEY = 'playgroundManualSession';
+
+/** Session already used by Paarrot/Cinny on this origin (localStorage). */
+export function peekPaarrotSession(): Session | undefined {
+  return getCurrentSession();
+}
+
+export function loadManualSession(): ManualSessionInput | null {
+  try {
+    const raw = sessionStorage.getItem(MANUAL_SESSION_KEY);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as ManualSessionInput;
+    if (parsed?.baseUrl && parsed?.userId && parsed?.deviceId && parsed?.accessToken) {
+      return parsed;
+    }
+  } catch {
+    /* ignore */
+  }
+  return null;
+}
+
+export function saveManualSession(input: ManualSessionInput | null) {
+  if (!input) {
+    sessionStorage.removeItem(MANUAL_SESSION_KEY);
+    return;
+  }
+  sessionStorage.setItem(MANUAL_SESSION_KEY, JSON.stringify(input));
+}
+
+function normalizeSession(input: Session | ManualSessionInput): Session {
+  return {
+    baseUrl: input.baseUrl.replace(/\/$/, ''),
+    userId: input.userId,
+    deviceId: input.deviceId,
+    accessToken: input.accessToken,
+  };
+}
+
+function resolveSession(explicit?: Session | ManualSessionInput): Session {
+  if (explicit) return normalizeSession(explicit);
+
+  const fromPaarrot = peekPaarrotSession();
+  if (fromPaarrot) return normalizeSession(fromPaarrot);
+
+  const manual = loadManualSession();
+  if (manual) return normalizeSession(manual);
+
+  throw new Error(
+    'No Paarrot session found. Log in at / (same origin), or paste homeserver + token in the playground.'
+  );
+}
+
+function waitForPrepared(mx: MatrixClient, timeoutMs = 90_000): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const finish = (ok: boolean, err?: Error) => {
+      clearTimeout(timer);
+      mx.off(ClientEvent.Sync, onSync);
+      if (ok) resolve();
+      else reject(err ?? new Error('Sync failed'));
+    };
+
+    const timer = window.setTimeout(
+      () => finish(false, new Error('Timed out waiting for Matrix sync')),
+      timeoutMs
+    );
+
+    const onSync = (state: SyncState | null) => {
+      if (state === SyncState.Prepared || state === SyncState.Syncing) {
+        finish(true);
+      }
+    };
+
+    mx.on(ClientEvent.Sync, onSync);
+    const cur = mx.getSyncState();
+    if (cur === SyncState.Prepared || cur === SyncState.Syncing) {
+      finish(true);
+    }
+  });
+}
+
+/**
+ * Live Matrix client for the playground.
+ * Uses MemoryStore so it won't fight Paarrot's IndexedDB sync/crypto stores.
+ * Skips Rust crypto — encrypted timelines won't decrypt, but profiles/rooms/settings APIs work.
+ */
+export async function connectLiveMatrixClient(
+  session?: Session | ManualSessionInput
+): Promise<MatrixClient> {
+  const finalSession = resolveSession(session);
+
+  const mx = createClient({
+    baseUrl: finalSession.baseUrl,
+    accessToken: finalSession.accessToken,
+    userId: finalSession.userId,
+    deviceId: finalSession.deviceId,
+    store: new MemoryStore({ localStorage: globalThis.localStorage }),
+    timelineSupport: true,
+  });
+
+  mx.setMaxListeners(50);
+  await mx.startClient({
+    lazyLoadMembers: true,
+    initialSyncLimit: 20,
+  });
+  await waitForPrepared(mx);
+  return mx;
+}
+
+export function stopLiveMatrixClient(mx: MatrixClient | null | undefined) {
+  if (!mx) return;
+  try {
+    mx.stopClient();
+  } catch {
+    /* ignore */
+  }
+}
+
+export function listJoinedRooms(mx: MatrixClient): Room[] {
+  return mx
+    .getRooms()
+    .filter((r) => r.getMyMembership() === 'join')
+    .sort((a, b) => (a.name || a.roomId).localeCompare(b.name || b.roomId));
+}
+
+export function pickDefaultRoom(mx: MatrixClient, preferredId?: string): Room | undefined {
+  const rooms = listJoinedRooms(mx);
+  if (preferredId) {
+    const hit = rooms.find((r) => r.roomId === preferredId);
+    if (hit) return hit;
+  }
+  return rooms[0];
+}

src/playground/main.tsx

@@ -0,0 +1,49 @@
+import { StrictMode, Component, type ErrorInfo, type ReactNode } from 'react';
+import { createRoot } from 'react-dom/client';
+import 'folds/dist/style.css';
+import { configClass, varsClass } from 'folds';
+import { App } from './App';
+import './styles.css';
+
+document.body.classList.add(configClass, varsClass);
+
+// Playground shares the Cinny origin — drop any SW/caches so stale shims cannot stick.
+if ('serviceWorker' in navigator) {
+  void navigator.serviceWorker.getRegistrations().then((regs) => {
+    for (const reg of regs) void reg.unregister();
+  });
+}
+if (typeof caches !== 'undefined') {
+  void caches.keys().then((keys) => Promise.all(keys.map((k) => caches.delete(k))));
+}
+
+class BootErrorBoundary extends Component<{ children: ReactNode }, { error: string | null }> {
+  state = { error: null as string | null };
+
+  static getDerivedStateFromError(error: Error) {
+    return { error: error.message };
+  }
+
+  componentDidCatch(error: Error, info: ErrorInfo) {
+    console.error('[playground boot]', error, info);
+  }
+
+  render() {
+    if (this.state.error) {
+      return (
+        <pre style={{ padding: 24, color: '#ffb4b4', whiteSpace: 'pre-wrap' }}>
+          {this.state.error}
+        </pre>
+      );
+    }
+    return this.props.children;
+  }
+}
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <BootErrorBoundary>
+      <App />
+    </BootErrorBoundary>
+  </StrictMode>
+);

src/playground/mocks/PlaygroundProviders.tsx

@@ -0,0 +1,106 @@
+import { ReactNode, useEffect, useMemo, useState } from 'react';
+import { Provider as JotaiProvider } from 'jotai';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { MemoryRouter } from 'react-router-dom';
+import {
+  Box,
+  OverlayContainerProvider,
+  PopOutContainerProvider,
+  TooltipContainerProvider,
+  configClass,
+  varsClass,
+} from 'folds';
+import { MatrixClientProvider } from '@cinny/app/hooks/useMatrixClient';
+import { RoomProvider, IsDirectRoomProvider } from '@cinny/app/hooks/useRoom';
+import { SpecVersionsProvider } from '@cinny/app/hooks/useSpecVersions';
+import { DarkTheme, ThemeContextProvider } from '@cinny/app/hooks/useTheme';
+import {
+  PowerLevelsContextProvider,
+  type IPowerLevels,
+} from '@cinny/app/hooks/usePowerLevels';
+import { ContainerColor } from '@cinny/app/styles/ContainerColor.css';
+import type { MatrixClient, Room } from 'matrix-js-sdk';
+import { MOCK_POWER_LEVELS, createMockRoom, mocks } from './matrix';
+
+type Props = {
+  children: ReactNode;
+  client?: MatrixClient;
+  room?: Room;
+  isDirect?: boolean;
+  powerLevels?: IPowerLevels;
+};
+
+const SPEC_VERSIONS = {
+  versions: ['v1.11', 'v1.12'],
+  unstable_features: {
+    'org.matrix.msc3916.stable': true,
+  },
+};
+
+/**
+ * Wraps a preview in the providers Cinny UI pieces usually expect.
+ * Overlay/popout/tooltip portals stay inside the stage (not the full window).
+ */
+export function PlaygroundProviders({
+  children,
+  client,
+  room,
+  isDirect = false,
+  powerLevels = MOCK_POWER_LEVELS as IPowerLevels,
+}: Props) {
+  const [portal, setPortal] = useState<HTMLDivElement | null>(null);
+  const queryClient = useMemo(() => new QueryClient(), []);
+  const resolvedClient = client ?? mocks.client;
+  // Always provide a room with `.client` set — RoomInput/useStateEvent require it.
+  const resolvedRoom = useMemo(() => {
+    if (room) return room;
+    return createMockRoom({ client: resolvedClient });
+  }, [room, resolvedClient]);
+
+  useEffect(() => {
+    document.body.classList.add(configClass, varsClass, ...DarkTheme.classNames);
+  }, []);
+
+  return (
+    <div className="preview-frame">
+      <ThemeContextProvider value={DarkTheme}>
+        <TooltipContainerProvider value={portal ?? undefined}>
+          <PopOutContainerProvider value={portal ?? undefined}>
+            <OverlayContainerProvider value={portal ?? undefined}>
+              <QueryClientProvider client={queryClient}>
+                <JotaiProvider>
+                  <MemoryRouter>
+                    <SpecVersionsProvider value={SPEC_VERSIONS}>
+                      <MatrixClientProvider value={resolvedClient}>
+                        <RoomProvider value={resolvedRoom}>
+                          <IsDirectRoomProvider value={isDirect}>
+                            <PowerLevelsContextProvider value={powerLevels}>
+                              <Box
+                                className={ContainerColor({ variant: 'Surface' })}
+                                style={{
+                                  width: '100%',
+                                  minHeight: '100%',
+                                  height: '100%',
+                                  padding: 16,
+                                  borderRadius: 8,
+                                }}
+                              >
+                                {children}
+                              </Box>
+                            </PowerLevelsContextProvider>
+                          </IsDirectRoomProvider>
+                        </RoomProvider>
+                      </MatrixClientProvider>
+                    </SpecVersionsProvider>
+                  </MemoryRouter>
+                </JotaiProvider>
+              </QueryClientProvider>
+            </OverlayContainerProvider>
+          </PopOutContainerProvider>
+        </TooltipContainerProvider>
+      </ThemeContextProvider>
+      {/* Host for folds Overlay/Dialog portals — contained by .preview-frame */}
+      <div className="preview-portal" ref={setPortal} />
+    </div>
+  );
+}

src/playground/mocks/index.ts

@@ -0,0 +1,2 @@
+export { mocks, createMockMatrixClient, createMockRoom, createMockMatrixEvent, MOCK_POWER_LEVELS } from './matrix';
+export { PlaygroundProviders } from './PlaygroundProviders';

src/playground/mocks/matrix.ts

@@ -0,0 +1,245 @@
+import type { MatrixClient, MatrixEvent, Room } from 'matrix-js-sdk';
+import { MessageEvent, StateEvent } from '@cinny/types/matrix/room';
+import type { IPowerLevels } from '@cinny/app/hooks/usePowerLevels';
+
+type AnyFn = (...args: never[]) => unknown;
+
+function fn<T extends AnyFn>(impl?: T): T {
+  return (impl ?? ((() => undefined) as T)) as T;
+}
+
+export const MOCK_USER_ID = '@alice:example.org';
+export const MOCK_OTHER_USER_ID = '@bob:example.org';
+export const MOCK_ROOM_ID = '!room:example.org';
+export const MOCK_EVENT_ID = '$event:example.org';
+
+/** Default power levels — user can send messages / invite. */
+export const MOCK_POWER_LEVELS: IPowerLevels = {
+  users_default: 0,
+  state_default: 50,
+  events_default: 0,
+  invite: 0,
+  redact: 50,
+  kick: 50,
+  ban: 50,
+  historical: 0,
+  events: {
+    'm.room.message': 0,
+    'm.reaction': 0,
+  },
+  users: {
+    [MOCK_USER_ID]: 100,
+  },
+  notifications: {
+    room: 50,
+  },
+};
+
+function mockStateEvent(type: string, content: Record<string, unknown>, stateKey = ''): MatrixEvent {
+  return {
+    getId: () => `$${type}`,
+    getSender: () => MOCK_USER_ID,
+    getTs: () => Date.now(),
+    getType: () => type,
+    getContent: () => content,
+    getWireContent: () => content,
+    isRedacted: () => false,
+    getStateKey: () => stateKey,
+    isEncrypted: () => false,
+    getRoomId: () => MOCK_ROOM_ID,
+    event: { sender: MOCK_USER_ID },
+  } as unknown as MatrixEvent;
+}
+
+/** Lightweight MatrixEvent stand-in for UI previews. */
+export function createMockMatrixEvent(
+  overrides: Partial<{
+    id: string;
+    sender: string;
+    body: string;
+    ts: number;
+    type: string;
+    redacted: boolean;
+    content: Record<string, unknown>;
+  }> = {}
+): MatrixEvent {
+  const id = overrides.id ?? MOCK_EVENT_ID;
+  const sender = overrides.sender ?? MOCK_OTHER_USER_ID;
+  const content = {
+    body: overrides.body ?? 'Hello from the playground preview.',
+    msgtype: 'm.text',
+    ...(overrides.content ?? {}),
+  };
+  const ts = overrides.ts ?? Date.now() - 60_000;
+  const type = overrides.type ?? MessageEvent.RoomMessage;
+  const redacted = overrides.redacted ?? false;
+
+  return {
+    getId: () => id,
+    getSender: () => sender,
+    getTs: () => ts,
+    getType: () => type,
+    getContent: () => (redacted ? {} : content),
+    getWireContent: () => content,
+    isRedacted: () => redacted,
+    getStateKey: () => undefined,
+    isEncrypted: () => false,
+    threadRootId: undefined,
+    getRoomId: () => MOCK_ROOM_ID,
+  } as unknown as MatrixEvent;
+}
+
+/** Lightweight Room stand-in. */
+export function createMockRoom(
+  overrides: Partial<{
+    roomId: string;
+    name: string;
+    client: MatrixClient;
+    members: Record<string, { displayName?: string; avatarMxc?: string }>;
+    powerLevels: IPowerLevels;
+  }> = {}
+): Room {
+  const roomId = overrides.roomId ?? MOCK_ROOM_ID;
+  const members = {
+    [MOCK_USER_ID]: { displayName: 'Alice' },
+    [MOCK_OTHER_USER_ID]: { displayName: 'Bob' },
+    ...(overrides.members ?? {}),
+  };
+  const powerLevels = overrides.powerLevels ?? MOCK_POWER_LEVELS;
+
+  const stateByType: Record<string, MatrixEvent> = {
+    [StateEvent.RoomPowerLevels]: mockStateEvent(
+      StateEvent.RoomPowerLevels,
+      powerLevels as unknown as Record<string, unknown>
+    ),
+    [StateEvent.RoomCreate]: mockStateEvent(StateEvent.RoomCreate, {
+      room_version: '11',
+      creator: MOCK_USER_ID,
+    }),
+    [StateEvent.RoomPinnedEvents]: mockStateEvent(StateEvent.RoomPinnedEvents, { pinned: [] }),
+  };
+
+  const getStateEvents = ((type: string, stateKey?: string) => {
+    const ev = stateByType[type];
+    if (stateKey !== undefined) return ev ?? null;
+    return ev ? [ev] : [];
+  }) as Room['currentState']['getStateEvents'];
+
+  const liveState = {
+    getStateEvents,
+  };
+
+  const client = overrides.client ?? ({
+    on: fn(() => undefined),
+    removeListener: fn(() => undefined),
+    once: fn(() => undefined),
+    off: fn(() => undefined),
+  } as unknown as MatrixClient);
+
+  return {
+    roomId,
+    name: overrides.name ?? 'Preview Room',
+    client,
+    getMyMembership: () => 'join',
+    getMember: (userId: string) => {
+      const m = members[userId];
+      if (!m) return null;
+      return {
+        userId,
+        name: m.displayName ?? userId,
+        rawDisplayName: m.displayName ?? userId,
+        getAvatarUrl: () => null,
+        getMxcAvatarUrl: () => m.avatarMxc ?? null,
+      };
+    },
+    getCanonicalAlias: () => null,
+    getAltAliases: () => [],
+    getTimelineForEvent: () => null,
+    getLiveTimeline: () => ({
+      getTimelineSet: () => ({ relations: { getChildEventsForEvent: () => null } }),
+      getEvents: () => [],
+      getState: () => liveState,
+    }),
+    currentState: {
+      getStateEvents,
+    },
+  } as unknown as Room;
+}
+
+/** Lightweight MatrixClient stand-in used by MatrixClientProvider. */
+export function createMockMatrixClient(
+  overrides: Partial<{ userId: string }> = {}
+): MatrixClient {
+  const userId = overrides.userId ?? MOCK_USER_ID;
+  const users = new Map<
+    string,
+    {
+      userId: string;
+      presence: string;
+      presenceStatusMsg?: string;
+      currentlyActive: boolean;
+      getLastActiveTs: () => number;
+      on: AnyFn;
+      removeListener: AnyFn;
+      once: AnyFn;
+      off: AnyFn;
+    }
+  >();
+
+  const ensureUser = (id: string) => {
+    if (!users.has(id)) {
+      users.set(id, {
+        userId: id,
+        presence: 'online',
+        currentlyActive: true,
+        getLastActiveTs: () => Date.now(),
+        on: fn(() => undefined),
+        removeListener: fn(() => undefined),
+        once: fn(() => undefined),
+        off: fn(() => undefined),
+      });
+    }
+    return users.get(id)!;
+  };
+  ensureUser(userId);
+  ensureUser(MOCK_OTHER_USER_ID);
+
+  const client = {
+    getUserId: () => userId,
+    getSafeUserId: () => userId,
+    getDomain: () => 'example.org',
+    getUser: (id: string) => ensureUser(id),
+    getRoom: (id: string | undefined) =>
+      id ? createMockRoom({ roomId: id, client: client as MatrixClient }) : null,
+    getRooms: () => [createMockRoom({ client: client as MatrixClient })],
+    isRoomEncrypted: () => false,
+    getAccountData: () => undefined,
+    sendEvent: fn(async () => ({ event_id: '$sent' })),
+    sendStateEvent: fn(async () => ({ event_id: '$state' })),
+    redactEvent: fn(async () => ({ event_id: '$redact' })),
+    reportEvent: fn(async () => ({})),
+    downloadKeys: fn(async () => ({})),
+    mxcUrlToHttp: (mxc: string) => mxc,
+    on: fn(() => undefined),
+    removeListener: fn(() => undefined),
+    once: fn(() => undefined),
+  } as unknown as MatrixClient;
+
+  return client;
+}
+
+const defaultClient = createMockMatrixClient();
+
+export const mocks = {
+  userId: MOCK_USER_ID,
+  otherUserId: MOCK_OTHER_USER_ID,
+  roomId: MOCK_ROOM_ID,
+  eventId: MOCK_EVENT_ID,
+  powerLevels: MOCK_POWER_LEVELS,
+  client: defaultClient,
+  room: createMockRoom({ client: defaultClient }),
+  event: createMockMatrixEvent(),
+  createClient: createMockMatrixClient,
+  createRoom: createMockRoom,
+  createEvent: createMockMatrixEvent,
+};

src/playground/monacoSetup.ts

@@ -0,0 +1,12 @@
+import editorWorker from 'monaco-editor/esm/vs/editor/editor.worker?worker';
+import jsonWorker from 'monaco-editor/esm/vs/language/json/json.worker?worker';
+import tsWorker from 'monaco-editor/esm/vs/language/typescript/ts.worker?worker';
+
+// Vite-friendly Monaco workers (no AMD CDN loader).
+self.MonacoEnvironment = {
+  getWorker(_workerId: string, label: string) {
+    if (label === 'json') return new jsonWorker();
+    if (label === 'typescript' || label === 'javascript') return new tsWorker();
+    return new editorWorker();
+  },
+};

src/playground/shims/loglevel.js

@@ -0,0 +1,65 @@
+/**
+ * Standalone loglevel stand-in for the playground.
+ * Avoids Vite CJS interop fights with the real package; matrix-js-sdk only needs
+ * getLogger / levels / methodFactory / setLevel / rebuild.
+ */
+
+const levels = {
+  TRACE: 0,
+  DEBUG: 1,
+  INFO: 2,
+  WARN: 3,
+  ERROR: 4,
+  SILENT: 5,
+};
+
+const loggers = new Map();
+
+function defaultMethodFactory(methodName) {
+  return (...args) => {
+    const supported =
+      methodName === 'error' ||
+      methodName === 'warn' ||
+      methodName === 'trace' ||
+      methodName === 'info' ||
+      methodName === 'debug';
+    if (supported) console[methodName](...args);
+    else console.log(...args);
+  };
+}
+
+function createLogger(name) {
+  const logger = {
+    name,
+    prefix: undefined,
+    methodFactory: defaultMethodFactory,
+    getChild: undefined,
+    setLevel(_level, _persist) {},
+    getLevel() {
+      return levels.WARN;
+    },
+    setDefaultLevel() {},
+    enableAll() {},
+    disableAll() {},
+    rebuild() {
+      for (const methodName of ['trace', 'debug', 'info', 'warn', 'error']) {
+        logger[methodName] = logger.methodFactory(methodName, levels.DEBUG, name);
+      }
+    },
+  };
+  logger.rebuild();
+  // matrix-js-sdk expects console-like `.log` (e.g. logger.log.bind(logger)).
+  logger.log = logger.info;
+  return logger;
+}
+
+const loglevel = createLogger('root');
+loglevel.levels = levels;
+loglevel.getLogger = (name) => {
+  const key = String(name ?? 'default');
+  if (!loggers.has(key)) loggers.set(key, createLogger(key));
+  return loggers.get(key);
+};
+loglevel.methodFactory = defaultMethodFactory;
+
+export default loglevel;

src/playground/styles.css

@@ -0,0 +1,414 @@
+:root {
+  color-scheme: dark;
+  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, sans-serif;
+  background: #0f1115;
+  color: #e8eaed;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html,
+body,
+#root {
+  margin: 0;
+  height: 100%;
+}
+
+.app {
+  height: 100%;
+  display: grid;
+  grid-template-rows: auto auto auto 1fr;
+}
+
+.conn-bar {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 12px 16px;
+  padding: 8px 14px;
+  border-bottom: 1px solid #232833;
+  background: #12161d;
+}
+
+.conn-modes {
+  display: flex;
+  gap: 6px;
+}
+
+.conn-btn {
+  border: 1px solid #2f3640;
+  background: transparent;
+  color: #c7ced8;
+  border-radius: 8px;
+  padding: 5px 10px;
+  cursor: pointer;
+  font-size: 12px;
+}
+
+.conn-btn:hover:not(:disabled) {
+  background: #1c2230;
+}
+
+.conn-btn.active {
+  background: #243147;
+  border-color: #3d7eff;
+  color: #fff;
+}
+
+.conn-btn:disabled {
+  opacity: 0.6;
+  cursor: wait;
+}
+
+.conn-status {
+  flex: 1;
+  min-width: 180px;
+  font-size: 12px;
+}
+
+.conn-ok {
+  color: #7dcea0;
+}
+
+.conn-err {
+  color: #ffb4b4;
+}
+
+.conn-room {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 12px;
+  color: #9aa3af;
+}
+
+.conn-room select {
+  max-width: 240px;
+  border: 1px solid #2f3640;
+  border-radius: 8px;
+  background: #0c0e12;
+  color: #e8eaed;
+  padding: 5px 8px;
+}
+
+.token-form {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(120px, 1fr)) auto;
+  gap: 8px;
+  padding: 8px 14px 10px;
+  border-bottom: 1px solid #232833;
+  background: #0f131a;
+}
+
+.token-form input {
+  border: 1px solid #2f3640;
+  border-radius: 8px;
+  background: #0c0e12;
+  color: #e8eaed;
+  padding: 7px 10px;
+  font-size: 12px;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
+}
+
+@media (max-width: 1100px) {
+  .token-form {
+    grid-template-columns: 1fr;
+  }
+}
+
+.topbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 10px 14px;
+  border-bottom: 1px solid #232833;
+  background: #141820;
+}
+
+.topbar-actions {
+  display: flex;
+  gap: 8px;
+}
+
+.muted {
+  color: #9aa3af;
+  font-size: 13px;
+}
+
+.ghost {
+  border: 1px solid #2f3640;
+  background: transparent;
+  color: #e8eaed;
+  border-radius: 8px;
+  padding: 6px 10px;
+  cursor: pointer;
+}
+
+.ghost:hover {
+  background: #1c2230;
+}
+
+.panes {
+  display: grid;
+  grid-template-columns: minmax(200px, 280px) 1.2fr 1fr;
+  min-height: 0;
+}
+
+.pane {
+  min-width: 0;
+  min-height: 0;
+  display: grid;
+  grid-template-rows: auto 1fr;
+  border-right: 1px solid #232833;
+}
+
+.pane:last-child {
+  border-right: 0;
+}
+
+.pane-label {
+  padding: 8px 12px;
+  font-size: 11px;
+  letter-spacing: 0.06em;
+  text-transform: uppercase;
+  color: #8b949e;
+  border-bottom: 1px solid #232833;
+  background: #12161d;
+}
+
+.catalog-pane {
+  grid-template-rows: auto auto 1fr;
+  background: #10141b;
+}
+
+.filter {
+  margin: 8px 10px;
+  border: 1px solid #2f3640;
+  border-radius: 8px;
+  background: #0c0e12;
+  color: #e8eaed;
+  padding: 8px 10px;
+  font-size: 13px;
+}
+
+.catalog-list {
+  overflow: auto;
+  padding: 4px 6px 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.catalog-item {
+  text-align: left;
+  border: 0;
+  background: transparent;
+  color: #c7ced8;
+  border-radius: 6px;
+  padding: 7px 8px;
+  font-size: 12px;
+  cursor: pointer;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
+}
+
+.catalog-item:hover {
+  background: #1a2130;
+}
+
+.catalog-item.active {
+  background: #243147;
+  color: #fff;
+}
+
+.editor-pane {
+  background: #1e1e1e;
+  grid-template-rows: auto 1fr;
+}
+
+.editor-tabs {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  text-transform: none;
+  letter-spacing: 0;
+}
+
+.tab {
+  border: 1px solid #2f3640;
+  background: transparent;
+  color: #9aa3af;
+  border-radius: 6px;
+  padding: 3px 8px;
+  font-size: 11px;
+  cursor: pointer;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
+
+.tab:hover:not(:disabled) {
+  background: #1c2230;
+  color: #e8eaed;
+}
+
+.tab.active {
+  background: #243147;
+  border-color: #3d7eff;
+  color: #fff;
+}
+
+.tab:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.tab-hint {
+  margin-left: auto;
+  font-size: 11px;
+  text-transform: none;
+  letter-spacing: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width: 55%;
+}
+
+.editor-error {
+  margin: 8px 12px;
+  max-width: none;
+}
+
+.preview-pane {
+  background: #0f1115;
+}
+
+.preview-body {
+  overflow: auto;
+  padding: 24px;
+  display: grid;
+  place-items: center;
+}
+
+.stage-wrap {
+  display: grid;
+  gap: 8px;
+  justify-items: center;
+}
+
+.stage-meta {
+  font-size: 12px;
+  color: #8b949e;
+  font-variant-numeric: tabular-nums;
+}
+
+.stage {
+  position: relative;
+  background:
+    linear-gradient(45deg, #161a22 25%, transparent 25%),
+    linear-gradient(-45deg, #161a22 25%, transparent 25%),
+    linear-gradient(45deg, transparent 75%, #161a22 75%),
+    linear-gradient(-45deg, transparent 75%, #161a22 75%);
+  background-size: 20px 20px;
+  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
+  background-color: #0c0e12;
+  border: 1px solid #2a3140;
+  border-radius: 10px;
+  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
+  /* Contain folds position:fixed overlays inside the stage. */
+  transform: translateZ(0);
+  overflow: hidden;
+}
+
+.stage-canvas {
+  width: 100%;
+  height: 100%;
+  overflow: auto;
+  padding: 12px;
+  display: grid;
+  place-items: stretch;
+  align-content: stretch;
+}
+
+.preview-frame {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  min-height: 200px;
+  /* Nested containing block so Overlay fixed coords map to the frame. */
+  transform: translateZ(0);
+  overflow: hidden;
+  border-radius: 8px;
+}
+
+.preview-portal {
+  position: absolute;
+  inset: 0;
+  z-index: 30;
+  pointer-events: none;
+}
+
+.preview-portal > * {
+  pointer-events: auto;
+}
+
+.handle {
+  position: absolute;
+  padding: 0;
+  border: 0;
+  background: #3d7eff;
+  opacity: 0.85;
+}
+
+.handle:hover {
+  opacity: 1;
+}
+
+.handle-e {
+  top: 12px;
+  right: -4px;
+  width: 8px;
+  height: calc(100% - 24px);
+  cursor: ew-resize;
+  border-radius: 999px;
+}
+
+.handle-s {
+  left: 12px;
+  bottom: -4px;
+  height: 8px;
+  width: calc(100% - 24px);
+  cursor: ns-resize;
+  border-radius: 999px;
+}
+
+.handle-se {
+  right: -5px;
+  bottom: -5px;
+  width: 12px;
+  height: 12px;
+  cursor: nwse-resize;
+  border-radius: 3px;
+}
+
+.error-block {
+  margin: 0;
+  max-width: 560px;
+  white-space: pre-wrap;
+  word-break: break-word;
+  padding: 14px 16px;
+  border-radius: 10px;
+  background: #2a1215;
+  border: 1px solid #5c1f28;
+  color: #ffb4b4;
+  font-size: 13px;
+  line-height: 1.45;
+}
+
+@media (max-width: 1100px) {
+  .panes {
+    grid-template-columns: 1fr;
+    grid-template-rows: 180px 1fr 1fr;
+  }
+}

src/playground/usePlaygroundMatrix.ts

@@ -0,0 +1,123 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import type { MatrixClient, Room } from 'matrix-js-sdk';
+import {
+  connectLiveMatrixClient,
+  listJoinedRooms,
+  loadManualSession,
+  peekPaarrotSession,
+  pickDefaultRoom,
+  saveManualSession,
+  stopLiveMatrixClient,
+  type LiveConnectMode,
+  type ManualSessionInput,
+} from './liveClient';
+
+type LiveState = {
+  mode: LiveConnectMode;
+  status: 'idle' | 'connecting' | 'ready' | 'error';
+  error: string | null;
+  client: MatrixClient | null;
+  room: Room | null;
+  rooms: Room[];
+  sessionLabel: string | null;
+};
+
+const initial: LiveState = {
+  mode: 'mock',
+  status: 'idle',
+  error: null,
+  client: null,
+  room: null,
+  rooms: [],
+  sessionLabel: null,
+};
+
+export function usePlaygroundMatrix() {
+  const [state, setState] = useState<LiveState>(initial);
+  const clientRef = useRef<MatrixClient | null>(null);
+  const roomIdRef = useRef<string | undefined>(undefined);
+  const paarrotSession = peekPaarrotSession();
+  const hasPaarrotSession = Boolean(paarrotSession);
+  const hasManualSession = Boolean(loadManualSession());
+
+  const teardown = useCallback(() => {
+    stopLiveMatrixClient(clientRef.current);
+    clientRef.current = null;
+  }, []);
+
+  useEffect(() => () => teardown(), [teardown]);
+
+  const selectRoom = useCallback((roomId: string) => {
+    roomIdRef.current = roomId;
+    setState((prev) => {
+      if (!prev.client) return prev;
+      const room = pickDefaultRoom(prev.client, roomId) ?? null;
+      return { ...prev, room };
+    });
+  }, []);
+
+  const connectLive = useCallback(
+    async (manual?: ManualSessionInput) => {
+      teardown();
+      setState((prev) => ({
+        ...prev,
+        mode: 'live',
+        status: 'connecting',
+        error: null,
+        client: null,
+        room: null,
+        rooms: [],
+        sessionLabel: null,
+      }));
+
+      try {
+        if (manual) saveManualSession(manual);
+        const mx = await connectLiveMatrixClient(manual);
+        clientRef.current = mx;
+        const rooms = listJoinedRooms(mx);
+        const room = pickDefaultRoom(mx, roomIdRef.current) ?? null;
+        if (room) roomIdRef.current = room.roomId;
+
+        const hs =
+          peekPaarrotSession()?.baseUrl ??
+          loadManualSession()?.baseUrl ??
+          '';
+        setState({
+          mode: 'live',
+          status: 'ready',
+          error: null,
+          client: mx,
+          room,
+          rooms,
+          sessionLabel: `${mx.getUserId() ?? '?'} · ${hs}`,
+        });
+      } catch (err) {
+        clientRef.current = null;
+        setState({
+          ...initial,
+          mode: 'live',
+          status: 'error',
+          error: err instanceof Error ? err.message : String(err),
+        });
+      }
+    },
+    [teardown]
+  );
+
+  const useMocks = useCallback(() => {
+    teardown();
+    roomIdRef.current = undefined;
+    setState(initial);
+  }, [teardown]);
+
+  return {
+    ...state,
+    hasPaarrotSession,
+    hasManualSession,
+    paarrotUserId: paarrotSession?.userId ?? null,
+    paarrotBaseUrl: paarrotSession?.baseUrl ?? null,
+    connectLive,
+    useMocks,
+    selectRoom,
+  };
+}

src/playground/vite-env.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="vite/client" />
+
+declare module '*?raw' {
+  const content: string;
+  default content;
+}
+
+declare module '/@playground/live.tsx' {
+  const Comp: React.ComponentType;
+  export default Comp;
+}

src/types/matrix/room.ts

@@ -48,6 +48,9 @@ export enum StateEvent {
   /** Paarrot room classification marker for custom room behaviors */
   PaarrotRoomKind = 'im.paarrot.room.kind',
 
+  /** Bot-driven declarative room UI (takes over room view) */
+  PaarrotUi = 'im.paarrot.ui',
+
   /** Matrix RTC call membership (MSC3401) */
   CallMember = 'org.matrix.msc3401.call.member',
 }
@@ -58,8 +61,117 @@ export enum MessageEvent {
   Sticker = 'm.sticker',
   RoomRedaction = 'm.room.redaction',
   Reaction = 'm.reaction',
+
+  /** Relay emoji confetti burst tied to a target message */
+  RelayEmojiConfetti = 'app.relay.emoji_confetti',
+
+  /** User interaction with bot-driven room UI (im.paarrot.ui) */
+  PaarrotUiAction = 'im.paarrot.ui.action',
 }
 
+/** Declarative UI node types for im.paarrot.ui */
+export type PaarrotUiNodeType =
+  | 'panel'
+  | 'row'
+  | 'text'
+  | 'button'
+  | 'input'
+  | 'select'
+  | 'image'
+  | 'spacer';
+
+export type PaarrotUiNodeBase = {
+  type: PaarrotUiNodeType;
+  id: string;
+};
+
+export type PaarrotUiPanelNode = PaarrotUiNodeBase & {
+  type: 'panel';
+  children?: PaarrotUiNode[];
+};
+
+export type PaarrotUiRowNode = PaarrotUiNodeBase & {
+  type: 'row';
+  children?: PaarrotUiNode[];
+};
+
+export type PaarrotUiTextNode = PaarrotUiNodeBase & {
+  type: 'text';
+  text?: string;
+  className?: string;
+};
+
+export type PaarrotUiButtonNode = PaarrotUiNodeBase & {
+  type: 'button';
+  label: string;
+  action: string;
+  value?: string | number | boolean;
+  disabled?: boolean;
+  variant?: 'Primary' | 'Secondary' | 'Success' | 'Warning' | 'Critical';
+};
+
+export type PaarrotUiInputNode = PaarrotUiNodeBase & {
+  type: 'input';
+  name?: string;
+  label?: string;
+  placeholder?: string;
+  value?: string;
+  inputType?: 'text' | 'number' | 'password';
+};
+
+export type PaarrotUiSelectOption = {
+  label: string;
+  value: string;
+};
+
+export type PaarrotUiSelectNode = PaarrotUiNodeBase & {
+  type: 'select';
+  name?: string;
+  label?: string;
+  options?: PaarrotUiSelectOption[];
+  value?: string;
+};
+
+export type PaarrotUiImageNode = PaarrotUiNodeBase & {
+  type: 'image';
+  src: string;
+  alt?: string;
+  width?: number;
+  height?: number;
+};
+
+export type PaarrotUiSpacerNode = PaarrotUiNodeBase & {
+  type: 'spacer';
+  size?: number;
+};
+
+export type PaarrotUiNode =
+  | PaarrotUiPanelNode
+  | PaarrotUiRowNode
+  | PaarrotUiTextNode
+  | PaarrotUiButtonNode
+  | PaarrotUiInputNode
+  | PaarrotUiSelectNode
+  | PaarrotUiImageNode
+  | PaarrotUiSpacerNode;
+
+/** Content of state event im.paarrot.ui */
+export type PaarrotUiContent = {
+  version: number;
+  title?: string;
+  css?: string;
+  root: PaarrotUiNode;
+};
+
+/** Content of timeline event im.paarrot.ui.action */
+export type PaarrotUiActionContent = {
+  action: string;
+  component_id: string;
+  value?: string | number | boolean;
+  values?: Record<string, string>;
+  ui_event_id?: string;
+};
+
 export enum RoomType {
   Space = 'm.space',
   Forum = 'm.forum',

vite.config.js

@@ -10,6 +10,9 @@ import { VitePWA } from 'vite-plugin-pwa';
 import fs from 'fs';
 import path from 'path';
 import buildConfig from './build.config';
+import { liveTsxPlugin, readDefaultLiveSource } from './playground-liveTsxPlugin';
+
+const projectRoot = path.resolve();
 
 const copyFiles = {
   targets: [
@@ -217,6 +220,30 @@ export default defineConfig({
   publicDir: false,
   base: buildConfig.base,
   assetsInclude: ['**/*.ogg', '**/*.mp3', '**/*.wav'],
+  resolve: {
+    // Keep a single React instance — dual copies cause resolveDispatcher() === null.
+    dedupe: ['react', 'react-dom'],
+    alias: [
+      { find: '@cinny', replacement: path.resolve(projectRoot, 'src') },
+      {
+        find: '@playground/mocks',
+        replacement: path.resolve(projectRoot, 'src/playground/mocks/index.ts'),
+      },
+      // Exact match only — do not rewrite loglevel/lib/...
+      {
+        find: /^loglevel$/,
+        replacement: path.resolve(projectRoot, 'src/playground/shims/loglevel.js'),
+      },
+      {
+        find: /^react$/,
+        replacement: path.resolve(projectRoot, 'node_modules/react'),
+      },
+      {
+        find: /^react-dom$/,
+        replacement: path.resolve(projectRoot, 'node_modules/react-dom'),
+      },
+    ],
+  },
   server: {
     port: 38347,
     host: '0.0.0.0',
@@ -232,6 +259,7 @@ export default defineConfig({
     serverMatrixSdkCryptoWasm('/node_modules/.vite/deps/pkg/matrix_sdk_crypto_wasm_bg.wasm'),
     serveGifWorker(),
     servePublicAssets(),
+    liveTsxPlugin(projectRoot, readDefaultLiveSource(projectRoot)),
     topLevelAwait({
       // The export name of top-level await promise for each chunk module
       promiseExportName: '__tla',
@@ -258,6 +286,16 @@ export default defineConfig({
     }),
   ],
   optimizeDeps: {
+    include: [
+      'react',
+      'react-dom',
+      'react/jsx-runtime',
+      'react/jsx-dev-runtime',
+      'loglevel',
+      'matrix-js-sdk',
+      '@monaco-editor/react',
+    ],
+    needsInterop: ['loglevel'],
     rolldownOptions: {
       define: {
         global: 'globalThis',
@@ -277,6 +315,10 @@ export default defineConfig({
     sourcemap: true,
     copyPublicDir: false,
     rollupOptions: {
+      input: {
+        main: path.resolve(projectRoot, 'index.html'),
+        playground: path.resolve(projectRoot, 'playground.html'),
+      },
       plugins: [inject({ Buffer: ['buffer', 'Buffer'] })],
     },
   },