Add MSC4522 username colors, release notes dialog, and profile layout fixes.

Replace legacy profile style metadata with MSC4133 profile fields, add in-app update notes, tighten account profile name spacing, and wire desktop media save helpers through the client.

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/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.json

@@ -84,8 +84,10 @@
     "react-error-boundary": "6.1.2",
     "react-google-recaptcha": "3.1.0",
     "react-i18next": "17.0.8",
+    "react-markdown": "10.1.0",
     "react-range": "1.10.0",
     "react-router-dom": "7.18.1",
+    "remark-gfm": "4.0.1",
     "sanitize-html": "2.17.5",
     "slate": "0.124.1",
     "slate-dom": "0.124.1",

public/update/4.11.175.md

@@ -0,0 +1,16 @@
+---
+version: 4.11.175
+title: Stability & polish
+date: 2026-08-10
+summary: Desktop update flow improvements and UI refinements.
+---
+
+## Desktop updates
+
+- Smoother download and install flow in the title bar updater.
+- Better handling when an update is already downloading.
+
+## UI polish
+
+- Refined spacing and contrast in settings panels.
+- Improved mobile layout for room headers and notifications.

public/update/currentupdate.md

@@ -0,0 +1,22 @@
+---
+version: 4.11.177
+title: Profile colors & banners
+date: 2026-08-23
+summary: Username colors now follow MSC4522 with separate dark and light theme pickers.
+---
+
+## Profile colors (MSC4522)
+
+Username colors are now stored on your Matrix profile instead of inside avatar images. In turn **will need to be updated in your Account settings**, this is now cross compatible with Element + Cinny
+
+- Set **separate colors for dark and light themes** in Settings → Account → Profile.
+- Per-room username overrides are read from member profile data when available.
+
+![Paarrot](./images/usernamecolors.png)
+
+## Profile banners (MSC4133)
+
+Profile banners now live on your Matrix profile via `m.banner_url` (MSC4133), not embedded in avatar metadata.
+
+- Upload or remove a banner independently from your avatar.
+- Other clients that support MSC4133 can read your banner directly.

public/update/manifest.json

@@ -0,0 +1,11 @@
+{
+  "current": "currentupdate.md",
+  "older": [
+    {
+      "file": "4.11.175.md",
+      "version": "4.11.175",
+      "title": "Stability & polish",
+      "date": "2026-08-10"
+    }
+  ]
+}

src/app/components/Pdf-viewer/PdfViewer.tsx

@@ -5,7 +5,7 @@ import classNames from 'classnames';
 import { Box, Button, Chip, Header, IconButton, Input, Menu, PopOut, RectCords, Scroll, Spinner, Text, as, config } from 'folds';
 import { Icon, Icons } from '../icons';
 import FocusTrap from 'focus-trap-react';
-import FileSaver from 'file-saver';
+import { saveMediaBlob } from '../../utils/saveMedia';
 import * as css from './PdfViewer.css';
 import { AsyncStatus } from '../../hooks/useAsyncCallback';
 import { useZoom } from '../../hooks/useZoom';
@@ -61,8 +61,14 @@ export const PdfViewer = as<'div', PdfViewerProps>(
       }
     }, [docState, pageNo, zoom]);
 
-    const handleDownload = () => {
-      FileSaver.saveAs(src, name);
+    const handleDownload = async () => {
+      try {
+        const res = await fetch(src);
+        if (!res.ok) throw new Error('Failed to fetch PDF');
+        await saveMediaBlob(await res.blob(), name);
+      } catch (error) {
+        console.warn('[PdfViewer] Failed to download:', error);
+      }
     };
 
     const handleJumpSubmit: FormEventHandler<HTMLFormElement> = (evt) => {

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 +1,61 @@
 /* eslint-disable jsx-a11y/no-noninteractive-element-interactions */
-import React from 'react';
-import FileSaver from 'file-saver';
+import React, {
+  useCallback,
+  useEffect,
+  useLayoutEffect,
+  useRef,
+  useState,
+} from 'react';
 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 { downloadAndSaveMedia } from '../../utils/saveMedia';
 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;
@@ -19,100 +64,382 @@ 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);
+        await downloadAndSaveMedia(src, alt, getCurrentAccessToken());
       } 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) {
-            const blob = await response.blob();
-            FileSaver.saveAs(blob, alt);
-          }
-        } catch {
-          // If all else fails, open in new tab to let browser handle it
           window.open(src, '_blank');
+        } catch {
+          // ignore
         }
       }
     };
 
+    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"
+              <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
-            className={css.ImageViewerImg}
-            style={{
-              cursor,
-              transform: `scale(${zoom}) translate(${pan.translateX}px, ${pan.translateY}px)`,
-            }}
+              ref={imgRef}
+              className={css.Image}
               src={src}
               alt={alt}
               draggable={false}
-            onMouseDown={onMouseDown}
+              onLoad={fitImage}
             />
-        </Box>
-      </Box>
+          </div>
+        </div>
+      </div>
     );
   }
 );

src/app/components/message/FileHeader.tsx

@@ -2,7 +2,6 @@ import { Badge, Box, IconButton, Spinner, Text, as, toRem } from 'folds';
 import { Icon, Icons } from '../icons';
 import React, { ReactNode, useCallback } from 'react';
 import { EncryptedAttachmentInfo } from 'browser-encrypt-attachment';
-import FileSaver from 'file-saver';
 import { mimeTypeToExt } from '../../utils/mimeTypes';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
@@ -14,6 +13,7 @@ import {
   mxcUrlToHttp,
 } from '../../utils/matrix';
 import { getCurrentAccessToken } from '../../utils/auth';
+import { saveMediaBlob } from '../../utils/saveMedia';
 
 const badgeStyles = { maxWidth: toRem(100) };
 
@@ -36,9 +36,8 @@ export function FileDownloadButton({ filename, url, mimeType, encInfo }: FileDow
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo), accessToken)
         : await downloadMedia(mediaUrl, accessToken);
 
-      const fileURL = URL.createObjectURL(fileContent);
-      FileSaver.saveAs(fileURL, filename);
-      return fileURL;
+      await saveMediaBlob(fileContent, filename);
+      return true;
     }, [mx, url, useAuthentication, mimeType, encInfo, filename])
   );
 

src/app/components/message/Reply.tsx

@@ -117,7 +117,7 @@ export const Reply = as<'div', ReplyProps>(
     const { body } = replyEvent?.getContent() ?? {};
     const sender = replyEvent?.getSender();
     const senderAvatarMxc = sender ? getMemberAvatarMxc(room, sender) : undefined;
-    const customUserColor = useOtherUserColor(sender ?? '', senderAvatarMxc);
+    const customUserColor = useOtherUserColor(sender ?? '', room);
     const powerTag = sender ? getMemberPowerTag?.(sender) : undefined;
     const tagColor = powerTag?.color ? accessibleTagColors?.get(powerTag.color) : undefined;
 

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

@@ -1,8 +1,8 @@
 import React, { ReactNode, useCallback, useState } from 'react';
 import { Box, Button, Modal, Overlay, OverlayBackdrop, OverlayCenter, Spinner, Text, Tooltip, TooltipProvider, as } from 'folds';
 import { Icon, Icons } from '../../icons';
-import FileSaver from 'file-saver';
 import { EncryptedAttachmentInfo } from 'browser-encrypt-attachment';
+import { saveMediaBlob } from '../../../utils/saveMedia';
 import FocusTrap from 'focus-trap-react';
 import { IFileInfo } from '../../../../types/matrix/common';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
@@ -252,9 +252,8 @@ export function DownloadFile({ body, mimeType, url, info, encInfo }: DownloadFil
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo), accessToken)
         : await downloadMedia(mediaUrl, accessToken);
 
-      const fileURL = URL.createObjectURL(fileContent);
-      FileSaver.saveAs(fileURL, body);
-      return fileURL;
+      await saveMediaBlob(fileContent, body);
+      return fileContent;
     }, [mx, url, useAuthentication, mimeType, encInfo, body])
   );
 
@@ -268,7 +267,7 @@ export function DownloadFile({ body, mimeType, url, info, encInfo }: DownloadFil
       size="400"
       onClick={() =>
         downloadState.status === AsyncStatus.Success
-          ? FileSaver.saveAs(downloadState.data, body)
+          ? saveMediaBlob(downloadState.data, body)
           : download()
       }
       disabled={downloadState.status === AsyncStatus.Loading}

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';
@@ -192,8 +191,7 @@ export const ImageContent = as<'div', ImageContentProps>(
             <div className={css.MediaSkeleton} />
           ))}
         {srcState.status === AsyncStatus.Success && (
-          <Overlay open={viewer} backdrop={<OverlayBackdrop />}>
-            <OverlayCenter>
+          <Overlay open={viewer} backdrop={null}>
             <FocusTrap
               focusTrapOptions={{
                 initialFocus: false,
@@ -201,19 +199,13 @@ export const ImageContent = as<'div', ImageContentProps>(
                 clickOutsideDeactivates: true,
                 escapeDeactivates: stopPropagation,
               }}
-              >
-                <Modal
-                  className={ModalWide}
-                  size="500"
             >
               {renderViewer({
                 src: srcState.data,
                 alt: body,
                 requestClose: () => setViewer(false),
               })}
-                </Modal>
             </FocusTrap>
-            </OverlayCenter>
           </Overlay>
         )}
         {!autoPlay && !markedAsSpoiler && srcState.status === AsyncStatus.Idle && (

src/app/components/updates-dialog/UpdateMarkdownViewer.tsx

@@ -0,0 +1,35 @@
+import React from 'react';
+import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
+import { resolveUpdateAssetUrl } from '../../data/updateNotes';
+import * as css from './UpdatesDialog.css';
+
+type UpdateMarkdownViewerProps = {
+  markdown: string;
+};
+
+export function UpdateMarkdownViewer({ markdown }: UpdateMarkdownViewerProps) {
+  if (!markdown.trim()) {
+    return null;
+  }
+
+  return (
+    <div className={css.Markdown}>
+      <ReactMarkdown
+        remarkPlugins={[remarkGfm]}
+        components={{
+          a: ({ href, children }) => (
+            <a href={href} target="_blank" rel="noreferrer noopener">
+              {children}
+            </a>
+          ),
+          img: ({ src, alt }) => (
+            <img src={resolveUpdateAssetUrl(src) ?? src} alt={alt ?? ''} loading="lazy" />
+          ),
+        }}
+      >
+        {markdown}
+      </ReactMarkdown>
+    </div>
+  );
+}

src/app/components/updates-dialog/UpdatesDialog.css.ts

@@ -0,0 +1,296 @@
+import { globalStyle, style } from '@vanilla-extract/css';
+import { color, config, toRem } from 'folds';
+
+const MOBILE_BREAKPOINT = '480px';
+
+/** Dialog height cap — 85% of the viewport, minus safe areas. */
+const DIALOG_MAX_HEIGHT =
+  'calc(85vh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px))';
+
+export const OverlayFrame = style({
+  boxSizing: 'border-box',
+  maxHeight: '100vh',
+  maxWidth: '100vw',
+  padding:
+    'env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px)',
+});
+
+export const DialogShell = style({
+  position: 'relative',
+  display: 'flex',
+  flexDirection: 'column',
+  width: '100%',
+  maxWidth: `min(${toRem(560)}, calc(100vw - ${config.space.S800}))`,
+  maxHeight: DIALOG_MAX_HEIGHT,
+  overflow: 'hidden',
+  backgroundColor: color.Surface.Container,
+  color: color.Surface.OnContainer,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      maxWidth: `calc(100vw - ${config.space.S400})`,
+    },
+  },
+});
+
+export const Hero = style({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S200,
+  padding: config.space.S500,
+  paddingBottom: config.space.S400,
+  backgroundColor: color.Primary.Container,
+  color: color.Primary.OnContainer,
+  borderBottom: `${config.borderWidth.B300} solid ${color.Primary.ContainerLine}`,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      padding: config.space.S400,
+      paddingBottom: config.space.S300,
+    },
+  },
+});
+
+export const HeroRow = style({
+  display: 'flex',
+  alignItems: 'center',
+  gap: config.space.S300,
+  minWidth: 0,
+});
+
+export const HeroLogo = style({
+  width: toRem(48),
+  height: toRem(48),
+  flexShrink: 0,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      width: toRem(40),
+      height: toRem(40),
+    },
+  },
+});
+
+export const HeroTitleWrap = style({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S100,
+  minWidth: 0,
+});
+
+export const BodyScroll = style({
+  flex: '1 1 auto',
+  minHeight: 0,
+  backgroundColor: color.Surface.Container,
+  color: color.Surface.OnContainer,
+});
+
+export const BodyContent = style({
+  display: 'flex',
+  flexDirection: 'column',
+  padding: config.space.S500,
+  paddingTop: config.space.S400,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      padding: config.space.S400,
+      paddingTop: config.space.S300,
+    },
+  },
+});
+
+export const BodyLoading = style({
+  padding: config.space.S800,
+});
+
+export const Markdown = style({
+  width: '100%',
+  color: color.Surface.OnContainer,
+  fontSize: toRem(14),
+  lineHeight: 1.55,
+});
+
+globalStyle(`${Markdown} h1, ${Markdown} h2, ${Markdown} h3, ${Markdown} h4`, {
+  margin: 0,
+  marginTop: config.space.S400,
+  marginBottom: config.space.S200,
+  lineHeight: 1.3,
+  color: color.Surface.OnContainer,
+});
+
+globalStyle(`${Markdown} h1:first-child, ${Markdown} h2:first-child, ${Markdown} h3:first-child, ${Markdown} h4:first-child`, {
+  marginTop: 0,
+});
+
+globalStyle(`${Markdown} h2`, { fontSize: toRem(18) });
+globalStyle(`${Markdown} h3`, { fontSize: toRem(16) });
+
+globalStyle(`${Markdown} p`, {
+  margin: 0,
+  marginBottom: config.space.S300,
+});
+
+globalStyle(`${Markdown} p:last-child`, { marginBottom: 0 });
+
+globalStyle(`${Markdown} ul, ${Markdown} ol`, {
+  margin: 0,
+  marginBottom: config.space.S300,
+  paddingLeft: config.space.S500,
+});
+
+globalStyle(`${Markdown} li`, { marginBottom: config.space.S100 });
+globalStyle(`${Markdown} li:last-child`, { marginBottom: 0 });
+
+globalStyle(`${Markdown} a`, {
+  color: color.Primary.Main,
+  textDecoration: 'underline',
+  textUnderlineOffset: toRem(2),
+});
+
+globalStyle(`${Markdown} a:hover`, { color: color.Primary.MainHover });
+
+globalStyle(`${Markdown} img`, {
+  display: 'block',
+  maxWidth: '100%',
+  height: 'auto',
+  marginTop: config.space.S200,
+  marginBottom: config.space.S300,
+  borderRadius: config.radii.R300,
+  border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+});
+
+globalStyle(`${Markdown} code`, {
+  fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace',
+  fontSize: toRem(13),
+  padding: `0 ${config.space.S100}`,
+  borderRadius: config.radii.R200,
+  backgroundColor: color.SurfaceVariant.Container,
+  color: color.SurfaceVariant.OnContainer,
+});
+
+globalStyle(`${Markdown} pre`, {
+  margin: 0,
+  marginBottom: config.space.S300,
+  padding: config.space.S300,
+  borderRadius: config.radii.R300,
+  backgroundColor: color.SurfaceVariant.Container,
+  overflow: 'auto',
+});
+
+globalStyle(`${Markdown} pre code`, {
+  padding: 0,
+  backgroundColor: 'transparent',
+});
+
+globalStyle(`${Markdown} blockquote`, {
+  margin: 0,
+  marginBottom: config.space.S300,
+  paddingLeft: config.space.S300,
+  borderLeft: `${toRem(3)} solid ${color.Primary.Main}`,
+  color: color.Surface.OnContainer,
+  opacity: 0.9,
+});
+
+globalStyle(`${Markdown} hr`, {
+  border: 'none',
+  borderTop: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+  margin: `${config.space.S400} 0`,
+});
+
+globalStyle(`${Markdown} table`, {
+  width: '100%',
+  borderCollapse: 'collapse',
+  marginBottom: config.space.S300,
+  fontSize: toRem(13),
+});
+
+globalStyle(`${Markdown} th, ${Markdown} td`, {
+  padding: config.space.S200,
+  border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+  textAlign: 'left',
+});
+
+globalStyle(`${Markdown} th`, {
+  backgroundColor: color.SurfaceVariant.Container,
+});
+
+export const OlderSection = style({
+  width: '100%',
+  marginTop: config.space.S500,
+});
+
+export const OlderToggle = style({
+  width: '100%',
+});
+
+export const OlderList = style({
+  listStyle: 'none',
+  margin: 0,
+  padding: 0,
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S100,
+  width: '100%',
+});
+
+export const OlderListItem = style({
+  width: '100%',
+});
+
+export const OlderItem = style({
+  all: 'unset',
+  boxSizing: 'border-box',
+  display: 'flex',
+  flexDirection: 'column',
+  alignItems: 'flex-start',
+  gap: config.space.S100,
+  width: '100%',
+  minHeight: toRem(48),
+  padding: config.space.S300,
+  borderRadius: config.radii.R300,
+  border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+  backgroundColor: color.SurfaceVariant.Container,
+  color: color.SurfaceVariant.OnContainer,
+  cursor: 'pointer',
+  textAlign: 'left',
+  selectors: {
+    '&:hover': {
+      backgroundColor: color.SurfaceVariant.ContainerHover,
+    },
+    '&[data-active="true"]': {
+      borderColor: color.Primary.Main,
+      backgroundColor: color.Primary.Container,
+      color: color.Primary.OnContainer,
+    },
+  },
+});
+
+export const Footer = style({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: config.space.S200,
+  padding: config.space.S400,
+  paddingTop: config.space.S300,
+  paddingBottom: `calc(${config.space.S400} + env(safe-area-inset-bottom, 0px))`,
+  borderTop: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+  backgroundColor: color.Surface.Container,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      padding: config.space.S300,
+      paddingTop: config.space.S300,
+      paddingBottom: `calc(${config.space.S300} + env(safe-area-inset-bottom, 0px))`,
+    },
+  },
+});
+
+export const FooterButton = style({
+  width: '100%',
+});
+
+export const CloseButton = style({
+  position: 'absolute',
+  top: config.space.S300,
+  right: config.space.S300,
+  '@media': {
+    [`(max-width: ${MOBILE_BREAKPOINT})`]: {
+      top: config.space.S200,
+      right: config.space.S200,
+    },
+  },
+});

src/app/components/updates-dialog/UpdatesDialog.tsx

@@ -0,0 +1,181 @@
+import React, { useState } from 'react';
+import FocusTrap from 'focus-trap-react';
+import {
+  Box,
+  Button,
+  Dialog,
+  IconButton,
+  Overlay,
+  OverlayBackdrop,
+  OverlayCenter,
+  Scroll,
+  Spinner,
+  Text,
+} from 'folds';
+import { Icon, Icons } from '../icons';
+import { stopPropagation } from '../../utils/keyboard';
+import type { ParsedUpdateDoc, UpdateManifest } from '../../data/updateNotes';
+import PaarrotSVG from '../../../../public/res/svg/paarrot.svg';
+import { UpdateMarkdownViewer } from './UpdateMarkdownViewer';
+import * as css from './UpdatesDialog.css';
+
+type UpdatesDialogProps = {
+  manifest: UpdateManifest | null;
+  activeDoc: ParsedUpdateDoc | null;
+  loading: boolean;
+  onSelectFile: (file: string) => void;
+  onClose: () => void;
+};
+
+export function UpdatesDialog({
+  manifest,
+  activeDoc,
+  loading,
+  onSelectFile,
+  onClose,
+}: UpdatesDialogProps) {
+  const [showOlderList, setShowOlderList] = useState(false);
+
+  const displayVersion = activeDoc?.version;
+  const displayTitle = activeDoc?.title ?? (displayVersion ? `Version ${displayVersion}` : 'Release notes');
+  const isCurrent = manifest && activeDoc?.file === manifest.current;
+  const olderEntries = manifest?.older ?? [];
+
+  const handleSelectOlder = (file: string) => {
+    onSelectFile(file);
+    setShowOlderList(false);
+  };
+
+  return (
+    <Overlay open backdrop={<OverlayBackdrop />}>
+      <OverlayCenter className={css.OverlayFrame}>
+        <FocusTrap
+          focusTrapOptions={{
+            initialFocus: false,
+            onDeactivate: onClose,
+            clickOutsideDeactivates: true,
+            escapeDeactivates: stopPropagation,
+          }}
+        >
+          <Dialog variant="Surface" className={css.DialogShell}>
+            <Box className={css.Hero}>
+              <Box className={css.HeroRow}>
+                <img className={css.HeroLogo} src={PaarrotSVG} alt="" draggable={false} />
+                <Box className={css.HeroTitleWrap}>
+                  <Text size="L400" priority="300">What&apos;s new</Text>
+                  <Text size="H4" truncate>
+                    {displayVersion ? `Paarrot ${displayVersion}` : 'Paarrot updates'}
+                  </Text>
+                </Box>
+              </Box>
+              <Text size="H6">{displayTitle}</Text>
+              {activeDoc?.date && (
+                <Text size="T200" priority="300">
+                  {activeDoc.date}
+                </Text>
+              )}
+              {!loading && !isCurrent && manifest?.current && (
+                <Button
+                  variant="Secondary"
+                  fill="Soft"
+                  radii="300"
+                  onClick={() => onSelectFile(manifest.current)}
+                >
+                  <Text size="B300">Back to current update</Text>
+                </Button>
+              )}
+            </Box>
+
+            <Scroll className={css.BodyScroll} visibility="Hover">
+              <Box className={css.BodyContent} direction="Column">
+                {loading && (
+                  <Box justifyContent="Center" alignItems="Center" className={css.BodyLoading}>
+                    <Spinner size="400" variant="Secondary" />
+                  </Box>
+                )}
+
+                {!loading && activeDoc?.markdown && (
+                  <UpdateMarkdownViewer markdown={activeDoc.markdown} />
+                )}
+
+                {!loading && !activeDoc?.markdown && (
+                  <Text size="T300" priority="400">
+                    No update notes are available right now.
+                  </Text>
+                )}
+
+                {!loading && olderEntries.length > 0 && (
+                  <Box className={css.OlderSection} direction="Column" gap="200">
+                    <Button
+                      className={css.OlderToggle}
+                      variant="Secondary"
+                      fill="Soft"
+                      radii="300"
+                      aria-expanded={showOlderList}
+                      onClick={() => setShowOlderList((open) => !open)}
+                    >
+                      <Text size="B300">
+                        {showOlderList
+                          ? 'Hide older versions'
+                          : `Older versions (${olderEntries.length})`}
+                      </Text>
+                    </Button>
+
+                    {showOlderList && (
+                      <ul className={css.OlderList}>
+                        {olderEntries.map((entry) => {
+                          const isActive = activeDoc?.file === entry.file;
+                          const label = entry.version ?? entry.file.replace(/\.md$/i, '');
+                          return (
+                            <li key={entry.file} className={css.OlderListItem}>
+                              <button
+                                type="button"
+                                className={css.OlderItem}
+                                data-active={isActive ? 'true' : 'false'}
+                                onClick={() => handleSelectOlder(entry.file)}
+                              >
+                                <Text size="B300">{label}</Text>
+                                {entry.title && (
+                                  <Text size="T200" priority="400">
+                                    {entry.title}
+                                  </Text>
+                                )}
+                                {entry.date && (
+                                  <Text size="T200" priority="300">
+                                    {entry.date}
+                                  </Text>
+                                )}
+                              </button>
+                            </li>
+                          );
+                        })}
+                      </ul>
+                    )}
+                  </Box>
+                )}
+              </Box>
+            </Scroll>
+
+            <Box className={css.Footer}>
+              <Button
+                className={css.FooterButton}
+                variant="Primary"
+                fill="Solid"
+                radii="300"
+                onClick={onClose}
+              >
+                <Text size="B400">Got it</Text>
+              </Button>
+            </Box>
+
+            <Box className={css.CloseButton}>
+              <IconButton variant="Surface" onClick={onClose} aria-label="Close">
+                <Icon src={Icons.Cross} />
+              </IconButton>
+            </Box>
+          </Dialog>
+        </FocusTrap>
+      </OverlayCenter>
+    </Overlay>
+  );
+}

src/app/components/updates-dialog/UpdatesDialogHost.tsx

@@ -0,0 +1,149 @@
+import { useCallback, useEffect, useState } from 'react';
+import { useAtom, useSetAtom } from 'jotai';
+import {
+  loadCurrentUpdateDocument,
+  loadUpdateDocument,
+  loadUpdateManifest,
+  type ParsedUpdateDoc,
+  type UpdateManifest,
+} from '../../data/updateNotes';
+import {
+  clearPendingReleaseNotes,
+  getLastSeenAppVersion,
+  releaseNotesDialogAtom,
+  setLastSeenAppVersion,
+  storePendingReleaseNotes,
+} from '../../state/releaseNotes';
+import { getAppVersion } from '../../utils/appVersion';
+import { UpdatesDialog } from './UpdatesDialog';
+
+type UpdaterInfo = {
+  version: string;
+  releaseNotes?: unknown;
+};
+
+/** Open the What's New dialog from Settings → About (or anywhere else). */
+export function useOpenReleaseNotesDialog(): () => void {
+  const setDialogState = useSetAtom(releaseNotesDialogAtom);
+  return useCallback(() => {
+    setDialogState({ open: true, manual: true });
+  }, [setDialogState]);
+}
+
+export function UpdatesDialogHost() {
+  const [dialogState, setDialogState] = useAtom(releaseNotesDialogAtom);
+  const [manifest, setManifest] = useState<UpdateManifest | null>(null);
+  const [activeDoc, setActiveDoc] = useState<ParsedUpdateDoc | null>(null);
+  const [loading, setLoading] = useState(false);
+
+  const closeDialog = useCallback(() => {
+    setDialogState({ open: false, manual: false });
+    setManifest(null);
+    setActiveDoc(null);
+    setLoading(false);
+  }, [setDialogState]);
+
+  const selectFile = useCallback(async (file: string) => {
+    setLoading(true);
+    const doc = await loadUpdateDocument(file);
+    setActiveDoc(doc);
+    setLoading(false);
+  }, []);
+
+  // Persist updater metadata when a download finishes (version tracking after restart).
+  useEffect(() => {
+    const electron = window.electron;
+    if (!electron?.updater?.onUpdateDownloaded) return undefined;
+
+    const onDownloaded = (info: UpdaterInfo) => {
+      if (!info?.version) return;
+      storePendingReleaseNotes(info.version, info.releaseNotes);
+    };
+
+    electron.updater.onUpdateDownloaded(onDownloaded);
+    return undefined;
+  }, []);
+
+  // Show What's New after the app version changes (post-update restart).
+  useEffect(() => {
+    let cancelled = false;
+
+    const checkVersion = async () => {
+      const currentVersion = await getAppVersion();
+      if (cancelled || currentVersion === 'unknown') return;
+
+      const lastSeen = getLastSeenAppVersion();
+      const shouldAutoShow = Boolean(lastSeen && lastSeen !== currentVersion);
+
+      if (shouldAutoShow) {
+        const loadedManifest = await loadUpdateManifest();
+        if (cancelled || !loadedManifest) return;
+
+        const doc = await loadUpdateDocument(loadedManifest.current);
+        if (cancelled || !doc) return;
+
+        setManifest(loadedManifest);
+        setActiveDoc(doc);
+        setDialogState({ open: true, manual: false });
+        clearPendingReleaseNotes();
+      }
+
+      if (!lastSeen || lastSeen !== currentVersion) {
+        setLastSeenAppVersion(currentVersion);
+      }
+    };
+
+    const timer = window.setTimeout(checkVersion, 1500);
+    return () => {
+      cancelled = true;
+      window.clearTimeout(timer);
+    };
+  }, [setDialogState]);
+
+  // Load markdown when the dialog opens (manual open from About, etc.).
+  useEffect(() => {
+    if (!dialogState.open) return undefined;
+
+    let cancelled = false;
+
+    const load = async () => {
+      setLoading(true);
+      const loadedManifest = await loadUpdateManifest();
+      if (cancelled) return;
+
+      if (!loadedManifest) {
+        setManifest(null);
+        setActiveDoc(null);
+        setLoading(false);
+        return;
+      }
+
+      const doc = await loadUpdateDocument(loadedManifest.current);
+      if (cancelled) return;
+
+      setManifest(loadedManifest);
+      setActiveDoc(doc);
+      setLoading(false);
+    };
+
+    load();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [dialogState.open]);
+
+  if (!dialogState.open) {
+    return null;
+  }
+
+  return (
+    <UpdatesDialog
+      manifest={manifest}
+      activeDoc={activeDoc}
+      loading={loading}
+      onSelectFile={selectFile}
+      onClose={closeDialog}
+    />
+  );
+}

src/app/components/updates-dialog/index.ts

@@ -0,0 +1,3 @@
+export * from './UpdatesDialog';
+export * from './UpdatesDialogHost';
+export * from './UpdateMarkdownViewer';

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';
@@ -14,7 +14,6 @@ import { ImageViewer } from '../image-viewer';
 import { stopPropagation } from '../../utils/keyboard';
 import { useOtherUserColor } from '../../hooks/useUserColor';
 import { useOtherUserBanner } from '../../hooks/useUserBanner';
-import { useOtherUserProfileStyle } from '../../hooks/useUserProfileStyle';
 
 type UserHeroProps = {
   userId: string;
@@ -24,15 +23,7 @@ type UserHeroProps = {
 };
 export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroProps) {
   const [viewAvatar, setViewAvatar] = useState<string>();
-  const bannerUrl = useOtherUserBanner(userId, avatarMxc); // Now returns blob URL directly
-  const profileStyle = useOtherUserProfileStyle(userId, avatarMxc);
-
-  console.log('[UserHero]', {
-    userId,
-    avatarMxc,
-    bannerUrl,
-    profileStyle,
-  });
+  const bannerUrl = useOtherUserBanner(userId);
 
   return (
     <Box
@@ -57,8 +48,6 @@ export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroPro
       <div className={css.UserHeroAvatarContainer}>
         <AvatarPresence
           className={css.UserAvatarContainer}
-          style={profileStyle.avatarBorderColor ? { backgroundColor: profileStyle.avatarBorderColor } : undefined}
-          badgeBackgroundColor={profileStyle.avatarBorderColor}
           badge={
             presence && <PresenceBadge presence={presence.presence} status={presence.status} />
           }
@@ -71,10 +60,6 @@ export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroPro
             style={{
               width: toRem(72),
               height: toRem(72),
-              ...(profileStyle.avatarBorderColor ? {
-                outline: `${toRem(4)} solid ${profileStyle.avatarBorderColor}`,
-                outlineOffset: toRem(-1),
-              } : {}),
             }}
           >
             <UserAvatar
@@ -87,8 +72,7 @@ export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroPro
           </Avatar>
         </AvatarPresence>
         {viewAvatar && (
-          <Overlay open backdrop={<OverlayBackdrop />}>
-            <OverlayCenter>
+          <Overlay open backdrop={null}>
             <FocusTrap
               focusTrapOptions={{
                 initialFocus: false,
@@ -97,15 +81,12 @@ export function UserHero({ userId, avatarUrl, avatarMxc, presence }: UserHeroPro
                 escapeDeactivates: stopPropagation,
               }}
             >
-                <Modal size="500" onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}>
               <ImageViewer
                 src={viewAvatar}
                 alt={userId}
                 requestClose={() => setViewAvatar(undefined)}
               />
-                </Modal>
             </FocusTrap>
-            </OverlayCenter>
           </Overlay>
         )}
       </div>
@@ -118,16 +99,9 @@ type UserHeroNameProps = {
   userId: string;
   avatarMxc?: string;
 };
-export function UserHeroName({ displayName, userId, avatarMxc }: UserHeroNameProps) {
+export function UserHeroName({ displayName, userId }: UserHeroNameProps) {
   const username = getMxIdLocalPart(userId);
-  const userColor = useOtherUserColor(userId, avatarMxc);
-
-  console.log('[UserHeroName]', {
-    userId,
-    avatarMxc,
-    userColor,
-    fallbackColor: colorMXID(userId),
-  });
+  const userColor = useOtherUserColor(userId);
 
   return (
     <Box grow="Yes" direction="Column" gap="100">

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

@@ -10,7 +10,6 @@ import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
 import { usePowerLevels } from '../../hooks/usePowerLevels';
 import { useRoom } from '../../hooks/useRoom';
 import { useUserPresence } from '../../hooks/useUserPresence';
-import { useOtherUserProfileStyle } from '../../hooks/useUserProfileStyle';
 import { IgnoredUserAlert, MutualRoomsChip, OptionsChip, ServerChip, ShareChip } from './UserChips';
 import { useCloseUserRoomProfile } from '../../state/hooks/userRoomProfile';
 import { PowerChip } from './PowerChip';
@@ -24,7 +23,7 @@ import { useMemberPowerCompare } from '../../hooks/useMemberPowerCompare';
 import { CreatorChip } from './CreatorChip';
 import { getDirectCreatePath, withSearchParam } from '../../pages/pathUtils';
 import { DirectCreateSearchParams } from '../../pages/paths';
-import { getContrastingTextColor, stripAlphaFromColor, getTextShadowColor } from '../../utils/common';
+import { getTextShadowColor } from '../../utils/common';
 import classNames from 'classnames';
 import { BreakWord, LineClamp3 } from '../../styles/Text.css';
 import colorMXID, { getColorMXIDValue } from '../../../util/colorMXID';
@@ -65,13 +64,7 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
   const avatarUrl = (avatarMxc && mxcUrlToHttp(mx, avatarMxc, useAuthentication)) ?? undefined;
 
   const presence = useUserPresence(userId);
-  const profileStyle = useOtherUserProfileStyle(userId, avatarMxc);
-  const userColor = useOtherUserColor(userId, avatarMxc);
-
-  // Build gradient CSS if configured
-  const gradientStyle = profileStyle.gradient
-    ? `linear-gradient(${profileStyle.gradient.direction}, ${profileStyle.gradient.startColor}, ${profileStyle.gradient.stopColor})`
-    : undefined;
+  const userColor = useOtherUserColor(userId);
 
   const handleMessage = () => {
     closeUserRoomProfile();
@@ -94,22 +87,6 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
   const profileColor = userColor ? userColor : getColorMXIDValue(userId);
   const profileTextShadow = `0 1px 4px ${getTextShadowColor(profileColor)}`;
 
-  // Use avatarBorderColor for pill background only if it has visible alpha (not fully transparent)
-  const hasVisibleBorder = profileStyle.avatarBorderColor && !profileStyle.avatarBorderColor.endsWith('00');
-  const pillBgColor = hasVisibleBorder ? stripAlphaFromColor(profileStyle.avatarBorderColor!) : undefined;
-
-  console.log('[UserRoomProfile]', {
-    userId,
-    avatarMxc,
-    userColor,
-    profileStyle,
-    profileColor,
-    profileTextShadow,
-    hasVisibleBorder,
-    pillBgColor,
-    fallbackColorMXID: getColorMXIDValue(userId),
-  });
-
   return (
     <Box direction="Column">
       <UserHero
@@ -126,8 +103,7 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
           padding: config.space.S400,
           paddingTop: `calc(${config.space.S200} + ${toRem(36)})`,
           marginTop: toRem(-36),
-          background: gradientStyle,
-          textAlign: 'center'
+          textAlign: 'center',
         }}
       >
         {/* Display Name */}
@@ -152,20 +128,14 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
         {presence?.status && (
           <Box
             style={{
-              backgroundColor: pillBgColor || color.Surface.Container,
-              border: pillBgColor ? 'none' : `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+              backgroundColor: color.Surface.Container,
+              border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
               padding: `${toRem(6)} ${toRem(10)}`,
               borderRadius: toRem(16),
               maxWidth: toRem(250),
             }}
           >
-            <Text 
-              size="T300" 
-              className={BreakWord}
-              style={{
-                color: pillBgColor ? getContrastingTextColor(pillBgColor) : undefined
-              }}
-            >
+            <Text size="T300" className={BreakWord}>
               {presence.status}
             </Text>
           </Box>
@@ -173,9 +143,9 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
         
         {/* Chips Row */}
         <Box alignItems="Center" gap="200" wrap="Wrap" justifyContent="Center">
-          {server && <ServerChip server={server} borderColor={pillBgColor} />}
-          <ShareChip userId={userId} borderColor={pillBgColor} />
-          {creator ? <CreatorChip borderColor={pillBgColor} /> : <PowerChip userId={userId} borderColor={pillBgColor} />}
+          {server && <ServerChip server={server} />}
+          <ShareChip userId={userId} />
+          {creator ? <CreatorChip /> : <PowerChip userId={userId} />}
         </Box>
         
         {/* Message Button */}
@@ -195,8 +165,8 @@ export function UserRoomProfile({ userId }: UserRoomProfileProps) {
         {/* Additional Chips if needed */}
         {userId !== myUserId && (
           <Box alignItems="Center" gap="200" wrap="Wrap" justifyContent="Center">
-            <MutualRoomsChip userId={userId} borderColor={pillBgColor} />
-            <OptionsChip userId={userId} borderColor={pillBgColor} />
+            <MutualRoomsChip userId={userId} />
+            <OptionsChip userId={userId} />
           </Box>
         )}
       </Box>

src/app/components/video-viewer/VideoViewer.tsx

@@ -1,10 +1,9 @@
 import React from 'react';
-import FileSaver from 'file-saver';
 import classNames from 'classnames';
 import { Box, Chip, Header, IconButton, Text, as } from 'folds';
 import { Icon, Icons } from '../icons';
 import * as css from './VideoViewer.css';
-import { downloadMedia } from '../../utils/matrix';
+import { downloadAndSaveMedia } from '../../utils/saveMedia';
 import { getCurrentAccessToken } from '../../utils/auth';
 
 export type VideoViewerProps = {
@@ -14,20 +13,16 @@ export type VideoViewerProps = {
 };
 
 export const VideoViewer = as<'div', VideoViewerProps>(
-  ({ className, alt, src, requestClose, ...props }, ref) => {    const handleDownload = async () => {
+  ({ className, alt, src, requestClose, ...props }, ref) => {
+    const handleDownload = async () => {
       try {
-        const fileContent = await downloadMedia(src, getCurrentAccessToken());
-        FileSaver.saveAs(fileContent, alt);
+        await downloadAndSaveMedia(src, alt, getCurrentAccessToken());
       } catch (error) {
         console.warn('[VideoViewer] Failed to download media:', error);
         try {
-          const response = await fetch(src);
-          if (response.ok) {
-            const blob = await response.blob();
-            FileSaver.saveAs(blob, alt);
-          }
-        } catch {
           window.open(src, '_blank');
+        } catch {
+          // ignore
         }
       }
     };

src/app/data/updateNotes.ts

@@ -0,0 +1,125 @@
+import { trimTrailingSlash } from '../utils/common';
+
+const UPDATE_BASE_PATH = `${trimTrailingSlash(import.meta.env.BASE_URL)}/update`;
+
+export type UpdateManifestEntry = {
+  file: string;
+  version?: string;
+  title?: string;
+  date?: string;
+};
+
+export type UpdateManifest = {
+  current: string;
+  older: UpdateManifestEntry[];
+};
+
+export type ParsedUpdateDoc = {
+  file: string;
+  version?: string;
+  title?: string;
+  date?: string;
+  summary?: string;
+  markdown: string;
+};
+
+const FRONTMATTER_RE = /^---\r?\n([\s\S]*?)\r?\n---\r?\n?([\s\S]*)$/;
+
+function parseFrontmatter(source: string): { frontmatter: Record<string, string>; body: string } {
+  const match = FRONTMATTER_RE.exec(source.trimStart());
+  if (!match) {
+    return { frontmatter: {}, body: source };
+  }
+
+  const frontmatter: Record<string, string> = {};
+  match[1].split('\n').forEach((line) => {
+    const colon = line.indexOf(':');
+    if (colon <= 0) return;
+    const key = line.slice(0, colon).trim();
+    const raw = line.slice(colon + 1).trim();
+    frontmatter[key] = raw.replace(/^['"]|['"]$/g, '');
+  });
+
+  return { frontmatter, body: match[2] };
+}
+
+function parseUpdateMarkdown(file: string, source: string): ParsedUpdateDoc {
+  const { frontmatter, body } = parseFrontmatter(source);
+  return {
+    file,
+    version: frontmatter.version,
+    title: frontmatter.title,
+    date: frontmatter.date,
+    summary: frontmatter.summary,
+    markdown: body.trim(),
+  };
+}
+
+export function resolveUpdateAssetUrl(src: string | undefined): string | undefined {
+  if (!src) return undefined;
+  if (/^(https?:|data:|blob:)/i.test(src)) return src;
+  if (src.startsWith('/')) return src;
+
+  const normalized = src.replace(/^\.\//, '');
+  return `${UPDATE_BASE_PATH}/${normalized}`;
+}
+
+export async function loadUpdateManifest(): Promise<UpdateManifest | null> {
+  try {
+    const response = await fetch(`${UPDATE_BASE_PATH}/manifest.json`, { cache: 'no-cache' });
+    if (!response.ok) return null;
+
+    const data = (await response.json()) as UpdateManifest;
+    if (!data?.current || !Array.isArray(data.older)) return null;
+
+    return {
+      current: data.current,
+      older: data.older.filter((entry) => entry?.file),
+    };
+  } catch {
+    return null;
+  }
+}
+
+export async function loadUpdateDocument(file: string): Promise<ParsedUpdateDoc | null> {
+  const safeFile = file.replace(/^\/+/, '');
+  if (!safeFile || safeFile.includes('..')) return null;
+
+  try {
+    const response = await fetch(`${UPDATE_BASE_PATH}/${safeFile}`, { cache: 'no-cache' });
+    if (!response.ok) return null;
+
+    const source = await response.text();
+    return parseUpdateMarkdown(safeFile, source);
+  } catch {
+    return null;
+  }
+}
+
+export async function loadCurrentUpdateDocument(): Promise<ParsedUpdateDoc | null> {
+  const manifest = await loadUpdateManifest();
+  if (!manifest) return null;
+  return loadUpdateDocument(manifest.current);
+}
+
+export async function getCurrentUpdatePreview(): Promise<{
+  title: string;
+  description: string;
+} | null> {
+  const doc = await loadCurrentUpdateDocument();
+  if (!doc) return null;
+
+  const title = doc.title ?? (doc.version ? `Paarrot ${doc.version}` : 'Release notes');
+  const description =
+    doc.summary ??
+    doc.markdown
+      .replace(/^#+\s+/gm, '')
+      .replace(/!\[[^\]]*\]\([^)]+\)/g, '')
+      .replace(/\[([^\]]+)\]\([^)]+\)/g, '$1')
+      .split('\n')
+      .map((line) => line.replace(/^[-*•]\s*/, '').trim())
+      .find(Boolean) ??
+    'See what changed in this version.';
+
+  return { title, description };
+}

src/app/features/message-search/SearchResultGroup.tsx

@@ -105,7 +105,7 @@ function SearchResultItem({
     relation?.rel_type === RelationType.Thread ? relation.event_id : undefined;
 
   // Get custom user color from avatar metadata
-  const customUserColor = useOtherUserColor(event.sender, senderAvatarMxc);
+  const customUserColor = useOtherUserColor(event.sender, room);
 
   const memberPowerTag = getMemberPowerTag(event.sender);
   const tagColor = memberPowerTag?.color

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} />
           ) : (
+            <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/RoomInput.tsx

@@ -183,7 +183,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     );
 
     // Get custom user color from avatar metadata
-    const replyCustomColor = useOtherUserColor(replyUserID ?? '', replyAvatarMxc);
+    const replyCustomColor = useOtherUserColor(replyUserID ?? '', room);
 
     const replyPowerTag = replyUserID ? getMemberPowerTag(replyUserID) : undefined;
     const replyPowerColor = replyPowerTag?.color

src/app/features/room/RoomTimeline.tsx

@@ -2011,6 +2011,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
         return 'CALL_EVENT_PENDING' as unknown as React.ReactNode;
       },
       [MessageEvent.RelayEmojiConfetti]: () => null,
+      [MessageEvent.PaarrotUiAction]: () => null,
     },
     (mEventId, mEvent, item) => {
       if (!showHiddenEvents) return null;

src/app/features/room/RoomViewHeader.tsx

@@ -489,7 +489,7 @@ export function RoomViewHeader({ forumLayout = false }: RoomViewHeaderProps) {
   const dmAvatarMxc =
     (dmUserId ? room.getMember(dmUserId)?.getMxcAvatarUrl() : undefined) ||
     (isDirect ? avatarMxc : undefined);
-  const dmCustomColor = useOtherUserColor(dmUserId ?? '', dmAvatarMxc);
+  const dmCustomColor = useOtherUserColor(dmUserId ?? '');
   const dmFolderTabColor =
     stationery && isDirect
       ? `color-mix(in srgb, ${dmCustomColor ?? colorMXID(dmUserId ?? room.roomId)} 50%, var(--folder-tab-room, #f3e6c8))`

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

@@ -1,13 +1,22 @@
-import React, { useEffect, useMemo, useRef, useState } from 'react';
+import React, { useEffect, useMemo, useRef } from 'react';
 import { createPortal } from 'react-dom';
 import { EmojiConfettiBurst } from './types';
-import { findJumboEmojiElement, getLocalBurstCanvasSize } from './findJumboMount';
+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;
 
@@ -17,6 +26,198 @@ type EmojiConfettiBurstCanvasProps = {
 };
 
 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[]>([]);
@@ -89,13 +290,7 @@ export function EmojiConfettiBurstCanvas({ burst, onComplete }: EmojiConfettiBur
       canvas.style.width = `${canvasSize}px`;
       canvas.style.height = `${canvasSize}px`;
 
-      spawnEmojiBurst(
-        particlesRef.current,
-        burst.id,
-        localOrigin,
-        burst.emojis[0] ?? '🎉',
-        performance.now()
-      );
+      spawnEmojiBurst(particlesRef.current, burst.id, localOrigin, primaryEmoji, performance.now());
 
       const tick = (now: number) => {
         updateLayerPosition();
@@ -152,7 +347,7 @@ export function EmojiConfettiBurstCanvas({ burst, onComplete }: EmojiConfettiBur
       window.clearInterval(retry);
       frameCleanup?.();
     };
-  }, [burst.emojis, burst.id, burst.targetEventId, canvasSize, localOrigin]);
+  }, [burst.id, burst.targetEventId, canvasSize, localOrigin, primaryEmoji]);
 
   return createPortal(
     <div

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

@@ -7,7 +7,8 @@ export type BurstMotionStyle =
   | 'spiral'
   | 'punch'
   | 'scatter'
-  | 'shower';
+  | 'shower'
+  | 'firework';
 
 export type EmojiBurstProfile = {
   style: BurstMotionStyle;
@@ -32,6 +33,19 @@ export type EmojiBurstProfile = {
   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 = {
@@ -340,6 +354,97 @@ const PROFILE_OVERRIDES: Record<string, Partial<EmojiBurstProfile>> = {
     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,
@@ -369,6 +474,10 @@ export function getEmojiBurstProfile(emoji: string): EmojiBurstProfile {
   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;

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

@@ -6,6 +6,60 @@ export function findJumboEmojiElement(targetEventId: string): HTMLElement | null
   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/message/Message.tsx

@@ -785,7 +785,7 @@ export const Message = as<'div', MessageProps>(
     const senderAvatarMxc = getMemberAvatarMxc(room, senderId);
 
     // Get custom user color from avatar metadata (takes priority)
-    const customUserColor = useOtherUserColor(senderId, senderAvatarMxc);
+    const customUserColor = useOtherUserColor(senderId, room);
 
     const tagColor = memberPowerTag?.color
       ? accessibleTagColors?.get(memberPowerTag.color)

src/app/features/room/room-pin-menu/RoomPinMenu.tsx

@@ -116,7 +116,7 @@ function PinnedMessage({
 
   const sender = pinnedEvent?.getSender();
   const senderAvatarMxc = sender ? getMemberAvatarMxc(room, sender) : undefined;
-  const customUserColor = useOtherUserColor(sender ?? '', senderAvatarMxc);
+  const customUserColor = useOtherUserColor(sender ?? '', room);
 
   const handleOpenClick: MouseEventHandler = (evt) => {
     evt.stopPropagation();

src/app/features/settings/about/About.tsx

@@ -1,5 +1,7 @@
 import React, { useCallback, useEffect, useState } from 'react';
-import { getVersion } from '@tauri-apps/api/app';
+import { getAppVersion } from '../../../utils/appVersion';
+import { useOpenReleaseNotesDialog } from '../../../components/updates-dialog/UpdatesDialogHost';
+import { getCurrentUpdatePreview } from '../../../data/updateNotes';
 import { Box, Text, IconButton, Scroll, Button, config, toRem } from 'folds';
 import { Icon, Icons } from '../../../components/icons';
 import { Page, PageContent, PageHeader } from '../../../components/page';
@@ -15,6 +17,7 @@ type AboutProps = {
 };
 export function About({ requestClose }: AboutProps) {
   const mx = useMatrixClient();
+  const openReleaseNotes = useOpenReleaseNotesDialog();
   const [version, setVersion] = useState<string>('');
   const [protocolStatus, setProtocolStatus] = useState<string>('Checking desktop protocol integration...');
   const [protocolBusy, setProtocolBusy] = useState<boolean>(false);
@@ -93,10 +96,13 @@ export function About({ requestClose }: AboutProps) {
   };
 
   useEffect(() => {
-    getVersion().then(setVersion).catch(() => setVersion('unknown'));
+    getAppVersion().then(setVersion).catch(() => setVersion('unknown'));
     refreshProtocolStatus();
+    getCurrentUpdatePreview().then(setUpdatePreview).catch(() => setUpdatePreview(null));
   }, [refreshProtocolStatus]);
 
+  const [updatePreview, setUpdatePreview] = useState<{ title: string; description: string } | null>(null);
+
   return (
     <Page>
       <PageHeader outlined={false}>
@@ -151,6 +157,36 @@ export function About({ requestClose }: AboutProps) {
                   </Box>
                 </Box>
               </Box>
+              <Box direction="Column" gap="100">
+                <Text size="L400">What&apos;s new</Text>
+                <SequenceCard
+                  className={SequenceCardStyle}
+                  variant="SurfaceVariant"
+                  direction="Column"
+                  gap="300"
+                >
+                  <SettingTile
+                    title={updatePreview?.title ?? 'Release notes'}
+                    description={
+                      updatePreview
+                        ? `Paarrot ${version} — ${updatePreview.description}`
+                        : 'View highlights from the latest Paarrot update.'
+                    }
+                    after={
+                      <Button
+                        onClick={openReleaseNotes}
+                        variant="Secondary"
+                        fill="Soft"
+                        size="300"
+                        radii="300"
+                        outlined
+                      >
+                        <Text size="B300">View updates</Text>
+                      </Button>
+                    }
+                  />
+                </SequenceCard>
+              </Box>
               <Box direction="Column" gap="100">
                 <Text size="L400">Options</Text>
                 <SequenceCard

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

@@ -11,7 +11,7 @@ import React, {
 import classNames from 'classnames';
 import { Box, Text, IconButton, Input, Avatar, Button, Overlay, OverlayBackdrop, OverlayCenter, Modal, Dialog, Header, config, Spinner, color, toRem } from 'folds';
 import { Icon, Icons } from '../../../components/icons';
-import { HexColorPicker, RgbaColorPicker, RgbaColor } from 'react-colorful';
+import { HexColorPicker } from 'react-colorful';
 import FocusTrap from 'focus-trap-react';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { UserProfile, useUserProfile } from '../../../hooks/useUserProfile';
@@ -19,7 +19,7 @@ import { getMxIdLocalPart, mxcUrlToHttp } from '../../../utils/matrix';
 import { UserAvatar } from '../../../components/user-avatar';
 import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
 import { useAuthenticatedMediaUrl } from '../../../hooks/useAuthenticatedMediaUrl';
-import { nameInitials, getContrastingTextColor, stripAlphaFromColor, getTextShadowColor } from '../../../utils/common';
+import { getTextShadowColor } from '../../../utils/common';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
 import { useFilePicker } from '../../../hooks/useFilePicker';
 import { useObjectURL } from '../../../hooks/useObjectURL';
@@ -29,30 +29,22 @@ import { ModalWide } from '../../../styles/Modal.css';
 import { createUploadAtom, UploadSuccess } from '../../../state/upload';
 import { CompactUploadCardRenderer } from '../../../components/upload-card';
 import { useCapabilities } from '../../../hooks/useCapabilities';
-import { HexColorPickerPopOut } from '../../../components/HexColorPickerPopOut';
-import { AngleSelector } from '../../../components/AngleSelector';
-import { useUserColor, useOtherUserColor } from '../../../hooks/useUserColor';
-import { useUserBanner, useOtherUserBanner } from '../../../hooks/useUserBanner';
-import { useUserProfileStyle } from '../../../hooks/useUserProfileStyle';
+import { useUserColorPreference } from '../../../hooks/useUserColor';
+import { useUserBanner } from '../../../hooks/useUserBanner';
 import { useUserPresence } from '../../../hooks/useUserPresence';
+import { useTheme, ThemeKind } from '../../../hooks/useTheme';
 import { AvatarPresence, PresenceBadge } from '../../../components/presence';
 import { BreakWord, LineClamp3 } from '../../../styles/Text.css';
 import colorMXID, { getColorMXIDValue } from '../../../../util/colorMXID';
-import {
-  embedMetadataInImage,
-  detectImageFormat,
-  getMimeType,
-  getExtension,
-  ImageMetadata,
-  needsPngForMetadata,
-  convertImageDataToPng,
-  uint8ArrayToBlob,
-} from '../../../utils/imageMetadata';
 import { getCurrentAccessToken } from '../../../utils/auth';
+import {
+  ColorPreference,
+  hasColorPreference,
+  resolveColorForTheme,
+} from '../../../utils/profileFields';
 
 /**
- * Banner upload component for user's profile banner
- * Stored in avatar image metadata, visible to other Paarrot users
+ * Banner upload component for user's profile banner (MSC4427 via MSC4133).
  */
 function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTMLDivElement>; nameRef: React.RefObject<HTMLDivElement> }) {
   const mx = useMatrixClient();
@@ -98,26 +90,25 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
     : undefined;
   const authenticatedCoverUrl = useAuthenticatedMediaUrl(avatarCoverUrl, useAuthentication);
 
-  const [userColor, setUserColor] = useUserColor();
-  const [localColor, setLocalColor] = useState(userColor ?? '#3b82f6');
+  const theme = useTheme();
+  const [colorPreference, setColorPreference, colorLoading] = useUserColorPreference();
+  const [localOnDark, setLocalOnDark] = useState('#ffd9f5');
+  const [localOnLight, setLocalOnLight] = useState('#440000');
   const [savingColor, setSavingColor] = useState(false);
   const [colorError, setColorError] = useState<string>();
 
   useEffect(() => {
-    if (userColor) {
-      setLocalColor(userColor);
-    }
-  }, [userColor]);
+    if (colorPreference?.on_dark) setLocalOnDark(colorPreference.on_dark);
+    if (colorPreference?.on_light) setLocalOnLight(colorPreference.on_light);
+  }, [colorPreference]);
 
   const handleColorSave = async () => {
     setSavingColor(true);
     setColorError(undefined);
     try {
-      await setUserColor(localColor);
-      // Sync user object to propagate changes throughout app
-      await syncUserAvatar();
+      await setColorPreference({ on_dark: localOnDark, on_light: localOnLight });
     } catch (e) {
-      setColorError('Failed to save color');
+      setColorError('Failed to save colors. Your server may not support profile fields (MSC4133).');
     }
     setSavingColor(false);
   };
@@ -126,141 +117,15 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
     setSavingColor(true);
     setColorError(undefined);
     try {
-      await setUserColor(undefined);
+      await setColorPreference(undefined);
+      setLocalOnDark('#ffd9f5');
+      setLocalOnLight('#440000');
     } catch (e) {
-      setColorError('Failed to remove color');
+      setColorError('Failed to remove colors');
     }
     setSavingColor(false);
   };
 
-  // Profile style settings (border color and gradient)
-  const [profileStyle, setProfileStyle, styleLoading] = useUserProfileStyle();
-  // Initialize with transparent alpha so saved values show in preview until user edits
-  const [localBorderColor, setLocalBorderColor] = useState<RgbaColor>({ r: 59, g: 130, b: 246, a: 0 });
-  const [localGradientStart, setLocalGradientStart] = useState<RgbaColor>({ r: 0, g: 0, b: 0, a: 0 });
-  const [localGradientStop, setLocalGradientStop] = useState<RgbaColor>({ r: 0, g: 0, b: 0, a: 0 });
-  const [localGradientDirection, setLocalGradientDirection] = useState(180); // degrees (180 = top to bottom)
-  const [savingStyle, setSavingStyle] = useState(false);
-  const [styleError, setStyleError] = useState<string>();
-  // Track if user has started editing (to show local values in preview)
-  const [editingBorder, setEditingBorder] = useState(false);
-  const [editingGradient, setEditingGradient] = useState(false);
-
-  // Helper to convert RGBA to hex with alpha (#RRGGBBAA)
-  const rgbaToHex = (rgba: RgbaColor): string => {
-    const r = rgba.r.toString(16).padStart(2, '0');
-    const g = rgba.g.toString(16).padStart(2, '0');
-    const b = rgba.b.toString(16).padStart(2, '0');
-    const a = Math.round(rgba.a * 255).toString(16).padStart(2, '0');
-    return `#${r}${g}${b}${a}`;
-  };
-
-  // Helper to convert hex with alpha to RGBA
-  const hexToRgba = (hex: string): RgbaColor => {
-    const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})?$/i.exec(hex);
-    if (result) {
-      return {
-        r: parseInt(result[1], 16),
-        g: parseInt(result[2], 16),
-        b: parseInt(result[3], 16),
-        a: result[4] ? parseInt(result[4], 16) / 255 : 1,
-      };
-    }
-    return { r: 59, g: 130, b: 246, a: 1 };
-  };
-
-  // Helper to parse degrees from direction string (e.g., "180deg" -> 180)
-  const parseDirectionDegrees = (direction: string): number => {
-    const degMatch = direction.match(/^(\d+)deg$/i);
-    if (degMatch) return parseInt(degMatch[1], 10);
-    // Fallback for legacy "to X" format
-    const keywordMap: Record<string, number> = {
-      'to top': 0,
-      'to top right': 45,
-      'to right': 90,
-      'to bottom right': 135,
-      'to bottom': 180,
-      'to bottom left': 225,
-      'to left': 270,
-      'to top left': 315,
-    };
-    return keywordMap[direction.toLowerCase()] ?? 180;
-  };
-
-  // Sync local style state with loaded profile style
-  useEffect(() => {
-    if (profileStyle.avatarBorderColor) {
-      setLocalBorderColor(hexToRgba(profileStyle.avatarBorderColor));
-    }
-    if (profileStyle.gradient) {
-      setLocalGradientStart(hexToRgba(profileStyle.gradient.startColor));
-      setLocalGradientStop(hexToRgba(profileStyle.gradient.stopColor));
-      setLocalGradientDirection(parseDirectionDegrees(profileStyle.gradient.direction));
-    }
-  }, [profileStyle]);
-
-  const handleBorderColorSave = async () => {
-    setSavingStyle(true);
-    setStyleError(undefined);
-    try {
-      await setProfileStyle({ avatarBorderColor: rgbaToHex(localBorderColor) });
-      await syncUserAvatar();
-      setEditingBorder(false);
-    } catch (e) {
-      setStyleError('Failed to save border color');
-    }
-    setSavingStyle(false);
-  };
-
-  const handleBorderColorRemove = async () => {
-    setSavingStyle(true);
-    setStyleError(undefined);
-    try {
-      await setProfileStyle({ avatarBorderColor: undefined });
-      await syncUserAvatar();
-      setEditingBorder(false);
-      setLocalBorderColor({ r: 59, g: 130, b: 246, a: 0 });
-    } catch (e) {
-      setStyleError('Failed to remove border color');
-    }
-    setSavingStyle(false);
-  };
-
-  const handleGradientSave = async () => {
-    setSavingStyle(true);
-    setStyleError(undefined);
-    try {
-      await setProfileStyle({
-        gradient: {
-          direction: `${localGradientDirection}deg`,
-          startColor: rgbaToHex(localGradientStart),
-          stopColor: rgbaToHex(localGradientStop),
-        },
-      });
-      await syncUserAvatar();
-      setEditingGradient(false);
-    } catch (e) {
-      setStyleError('Failed to save gradient');
-    }
-    setSavingStyle(false);
-  };
-
-  const handleGradientRemove = async () => {
-    setSavingStyle(true);
-    setStyleError(undefined);
-    try {
-      await setProfileStyle({ gradient: undefined });
-      await syncUserAvatar();
-      setEditingGradient(false);
-      setLocalGradientStart({ r: 0, g: 0, b: 0, a: 0 });
-      setLocalGradientStop({ r: 0, g: 0, b: 0, a: 0 });
-      setLocalGradientDirection(180);
-    } catch (e) {
-      setStyleError('Failed to remove gradient');
-    }
-    setSavingStyle(false);
-  };
-
   const [isEditingName, setIsEditingName] = useState(false);
   const [editedName, setEditedName] = useState(profile.displayName || '');
   const [savingName, setSavingName] = useState(false);
@@ -475,22 +340,6 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
       setSaving(true);
       setError(undefined);
       try {
-        // 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) {
@@ -501,64 +350,12 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
         }
         setAvatarFile(undefined);
         await syncUserAvatar();
-          return;
-        }
-
-        const httpUrl = mxcUrlToHttp(mx, upload.mxc, useAuthentication);
-        if (!httpUrl) throw new Error('Could not resolve uploaded avatar URL');
-
-        // Always use current session's token to avoid stale tokens during account switches
-        const accessToken = getCurrentAccessToken();
-        let response = await fetch(httpUrl, {
-          headers: accessToken && useAuthentication ? { Authorization: `Bearer ${accessToken}` } : undefined,
-        });
-
-        // If we got a 401 and we tried with auth, fallback to unauthenticated request
-        if (!response.ok && response.status === 401 && accessToken && useAuthentication) {
-          console.warn('[Profile] Auth failed (401), attempting unauthenticated fallback for avatar fetch');
-          response = await fetch(httpUrl);
-        }
-
-        if (!response.ok) throw new Error('Failed to fetch uploaded avatar');
-        let avatarData: ArrayBuffer | Uint8Array = await response.arrayBuffer();
-
-        let format = detectImageFormat(avatarData);
-        if (format === 'unknown') throw new Error('Unsupported avatar image format');
-
-        // Banner / border / gradient only live in PNG tEXt — convert JPEG/WebP/GIF first
-        if (format !== 'png' && needsPngForMetadata(metadata)) {
-          const pngData = await convertImageDataToPng(avatarData);
-          if (!pngData) throw new Error('Failed to convert avatar to PNG for metadata');
-          avatarData = pngData;
-          format = 'png';
-        }
-
-        const modifiedData = embedMetadataInImage(avatarData, metadata);
-        if (!modifiedData) throw new Error('Failed to embed metadata in avatar');
-
-        const mimeType = getMimeType(format);
-        const extension = getExtension(format);
-        const blob = uint8ArrayToBlob(modifiedData, mimeType);
-        const uploadResponse = await mx.uploadContent(blob, { name: `avatar.${extension}`, type: mimeType });
-
-        await mx.setAvatarUrl(uploadResponse.content_uri);
-
-        const userId = mx.getUserId();
-        if (userId) {
-          const user = mx.getUser(userId);
-          if (user && user.avatarUrl !== uploadResponse.content_uri) {
-            user.setAvatarUrl(uploadResponse.content_uri);
-          }
-        }
-
-        setAvatarFile(undefined);
-        await syncUserAvatar();
       } catch (e: any) {
         setError(`Failed to save avatar: ${e?.message || 'Unknown error'}`);
       }
       setSaving(false);
     },
-    [mx, useAuthentication, userBanner, userColor, profileStyle, syncUserAvatar]
+    [mx, syncUserAvatar]
   );
 
   const handleRemoveBanner = async () => {
@@ -574,24 +371,11 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
     setSaving(false);
   };
 
-  // Build gradient CSS for preview (shows local editing values when user is editing,
-  // otherwise falls back to saved profile style)
-  const previewGradient = editingGradient
-    ? `linear-gradient(${localGradientDirection}deg, ${rgbaToHex(localGradientStart)}, ${rgbaToHex(localGradientStop)})`
-    : profileStyle.gradient
-      ? `linear-gradient(${profileStyle.gradient.direction}, ${profileStyle.gradient.startColor}, ${profileStyle.gradient.stopColor})`
-      : undefined;
-
-  // Build border color for preview (shows local editing value when user is editing,
-  // otherwise falls back to saved profile style)
-  const previewBorderColor = editingBorder
-    ? rgbaToHex(localBorderColor)
-    : profileStyle.avatarBorderColor;
-
-  const previewPillBgColor = previewBorderColor ? stripAlphaFromColor(previewBorderColor) : undefined;
-  const previewProfileColor = userColor || getColorMXIDValue(userId);
-
+  const previewPreference: ColorPreference = { on_dark: localOnDark, on_light: localOnLight };
+  const previewProfileColor =
+    resolveColorForTheme(previewPreference, theme.kind) || getColorMXIDValue(userId, theme.kind === ThemeKind.Dark);
   const previewTextShadow = `0 1px 4px ${getTextShadowColor(previewProfileColor)}`;
+  const hasSavedColors = hasColorPreference(colorPreference);
 
   return (
     <Box direction="Column" gap="300">
@@ -627,7 +411,7 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                 cursor: 'pointer',
                 border: 'none',
                 padding: 0,
-                backgroundColor: bannerBlobUrl ? 'transparent' : (userColor || colorMXID(userId)),
+                backgroundColor: bannerBlobUrl ? 'transparent' : colorMXID(userId),
                 filter: bannerBlobUrl || authenticatedCoverUrl ? 'none' : 'brightness(50%)',
                 display: 'flex',
                 alignItems: 'center',
@@ -740,7 +524,7 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                 as="button"
                 onClick={handleAvatarClick}
                 style={{
-                  backgroundColor: previewBorderColor || color.Surface.Container,
+                  backgroundColor: color.Surface.Container,
                   border: 'none',
                   padding: 0,
                   cursor: 'pointer',
@@ -748,7 +532,6 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                 }}
               >
                 <AvatarPresence
-                  badgeBackgroundColor={previewBorderColor}
                   badge={
                     presence && (
                       <PresenceBadge presence={presence.presence} status={presence.status} />
@@ -760,9 +543,7 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                     style={{
                       width: toRem(72),
                       height: toRem(72),
-                      outline: previewBorderColor
-                        ? `${toRem(4)} solid ${previewBorderColor}`
-                        : `${config.borderWidth.B600} solid ${color.Surface.Container}`,
+                      outline: `${config.borderWidth.B600} solid ${color.Surface.Container}`,
                     }}
                   >
                     <UserAvatar
@@ -832,73 +613,20 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
             </Box>
           </Box>
 
-          {/* Profile Info Section - matches UserRoomProfile gradient section */}
+          {/* Profile Info Section */}
           <Box
             direction="Column"
-            gap="400"
+            gap="200"
             alignItems="Center"
             style={{
               padding: config.space.S400,
               paddingTop: `calc(${config.space.S400} + ${toRem(36)})`,
               marginTop: toRem(-36),
-              background: previewGradient,
               textAlign: 'center',
             }}
           >
-            {/* Display Name with Color Picker */}
-            <Box alignItems="Center" gap="200" justifyContent="Center">
-              <HexColorPickerPopOut
-                picker={
-                  <Box direction="Column" gap="200">
-                    <HexColorPicker color={localColor} onChange={setLocalColor} />
-                    <Box gap="100" alignItems="Center">
-                      <Input
-                        size="300"
-                        variant="Secondary"
-                        style={{ width: toRem(100) }}
-                        value={localColor}
-                        onChange={(e) => {
-                          setLocalColor(e.target.value);
-                          setColorError(undefined);
-                        }}
-                      />
-                      <Button
-                        size="300"
-                        variant="Primary"
-                        fill="Solid"
-                        radii="300"
-                        onClick={handleColorSave}
-                        disabled={savingColor}
-                      >
-                        <Text size="B300">{savingColor ? 'Saving...' : 'Save'}</Text>
-                      </Button>
-                    </Box>
-                    {colorError && (
-                      <Text size="T200" style={{ color: color.Critical.Main }}>
-                        {colorError}
-                      </Text>
-                    )}
-                  </Box>
-                }
-                onRemove={userColor ? handleColorRemove : undefined}
-              >
-                {(onOpen) => (
-                  <Box
-                    as="button"
-                    onClick={onOpen}
-                    disabled={savingColor}
-                    style={{
-                      width: toRem(24),
-                      height: toRem(24),
-                      borderRadius: toRem(6),
-                      backgroundColor: userColor ?? localColor,
-                      border: 'none',
-                      cursor: 'pointer',
-                      flexShrink: 0,
-                    }}
-                  />
-                )}
-              </HexColorPickerPopOut>
+            {/* Display Name */}
+            <Box style={{ width: '100%' }}>
               {isEditingName ? (
                 <Input
                   autoFocus
@@ -910,6 +638,7 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                   size="400"
                   disabled={savingName}
                   style={{
+                    width: '100%',
                     fontSize: 'var(--token.font-size.H400)',
                     fontWeight: 'var(--token.font-weight.H400)',
                     padding: `${toRem(4)} ${toRem(8)}`,
@@ -926,19 +655,28 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                   onMouseEnter={() => setHoveredArea('name')}
                   onMouseLeave={() => setHoveredArea(null)}
                   style={{
+                    width: '100%',
                     border: 'none',
                     background: 'none',
                     cursor: 'pointer',
                     padding: `${toRem(4)} ${toRem(8)}`,
-                    margin: `${toRem(-4)} ${toRem(-8)}`,
                     position: 'relative',
+                    display: 'flex',
+                    justifyContent: 'center',
+                    alignItems: 'center',
+                    lineHeight: 1.2,
                   }}
                 >
                   <Text
                     size="H4"
                     className={classNames(BreakWord, LineClamp3)}
                     title={profile.displayName || getMxIdLocalPart(userId)}
-                    style={{ color: previewProfileColor, textShadow: previewTextShadow }}
+                    style={{
+                      color: previewProfileColor,
+                      textShadow: previewTextShadow,
+                      textAlign: 'center',
+                      maxWidth: '100%',
+                    }}
                   >
                     {profile.displayName || getMxIdLocalPart(userId) || userId}
                   </Text>
@@ -946,8 +684,9 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                     <Box
                       style={{
                         position: 'absolute',
-                        top: 0,
-                        right: toRem(-32),
+                        top: '50%',
+                        right: 0,
+                        transform: 'translateY(-50%)',
                         backgroundColor: color.Surface.Container,
                         borderRadius: toRem(20),
                         padding: toRem(6),
@@ -980,8 +719,8 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
               onMouseEnter={() => setHoveredArea('status')}
               onMouseLeave={() => setHoveredArea(null)}
               style={{
-                backgroundColor: previewPillBgColor || color.Surface.Container,
-                border: previewPillBgColor ? 'none' : `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+                backgroundColor: color.Surface.Container,
+                border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
                 padding: `${toRem(6)} ${toRem(10)}`,
                 borderRadius: toRem(16),
                 maxWidth: toRem(250),
@@ -1032,14 +771,13 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
                       className={BreakWord}
                       style={{
                         fontStyle: presence?.status ? 'normal' : 'italic',
-                        color: previewPillBgColor ? getContrastingTextColor(previewPillBgColor) : undefined,
                       }}
                     >
                       {presence?.status || 'Click to set a custom status...'}</Text>
                   </Box>
                   {presence?.status && hoveredArea === 'status' && (
                     <>
-                      <Icon size="50" src={Icons.Pencil} style={{ color: previewPillBgColor ? getContrastingTextColor(previewPillBgColor) : undefined }} />
+                      <Icon size="50" src={Icons.Pencil} />
                       <Box
                         as="button"
                         onClick={(e) => {
@@ -1070,63 +808,42 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
             <Box alignItems="Center" gap="200" wrap="Wrap" justifyContent="Center">
               <Box
                 style={{
-                  backgroundColor: previewPillBgColor || color.Surface.Container,
-                  border: previewPillBgColor ? 'none' : `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+                  backgroundColor: color.Surface.Container,
+                  border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
                   padding: `${toRem(4)} ${toRem(8)}`,
                   borderRadius: toRem(16),
                 }}
               >
-                <Text 
-                  size="B300" 
-                  style={{
-                    color: previewPillBgColor ? getContrastingTextColor(previewPillBgColor) : undefined,
-                  }}
-                >
-                  ruv.wtf
-                </Text>
+                <Text size="B300">ruv.wtf</Text>
               </Box>
               <Box
                 style={{
-                  backgroundColor: previewPillBgColor || color.Surface.Container,
-                  border: previewPillBgColor ? 'none' : `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+                  backgroundColor: color.Surface.Container,
+                  border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
                   padding: `${toRem(4)} ${toRem(8)}`,
                   borderRadius: toRem(16),
                 }}
               >
-                <Text 
-                  size="B300"
-                  style={{
-                    color: previewPillBgColor ? getContrastingTextColor(previewPillBgColor) : undefined,
-                  }}
-                >
-                  Share
-                </Text>
+                <Text size="B300">Share</Text>
               </Box>
               <Box
                 style={{
-                  backgroundColor: previewPillBgColor || color.Surface.Container,
-                  border: previewPillBgColor ? 'none' : `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+                  backgroundColor: color.Surface.Container,
+                  border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
                   padding: `${toRem(4)} ${toRem(8)}`,
                   borderRadius: toRem(16),
                 }}
               >
-                <Text 
-                  size="B300"
-                  style={{
-                    color: previewPillBgColor ? getContrastingTextColor(previewPillBgColor) : undefined,
-                  }}
-                >
-                  Admin
-                </Text>
+                <Text size="B300">Admin</Text>
               </Box>
             </Box>
           </Box>
         </Box>
 
-      {/* Profile Style Settings */}
+      {/* MSC4522 username colors */}
       <Box
         direction="Column"
-        gap="200"
+        gap="300"
         style={{
           padding: config.space.S300,
           border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
@@ -1134,111 +851,91 @@ function ProfileBanner({ avatarRef, nameRef }: { avatarRef: React.RefObject<HTML
           width: '100%',
         }}
       >
-        <Text size="H6">Profile Style</Text>
-        
-        {/* Avatar Border Color */}
-        <Box direction="Column" gap="100">
-          <Text size="T300">Avatar Border Color</Text>
-          <Box gap="200" alignItems="Center" wrap="Wrap">
-            <RgbaColorPicker color={localBorderColor} onChange={(c) => { setLocalBorderColor(c); setEditingBorder(true); }} />
-            <Box direction="Column" gap="100">
-              <Text size="T200" style={{ opacity: 0.7 }}>
-                Preview: {rgbaToHex(localBorderColor)}
+        <Text size="H6">Username colors</Text>
+        <Text size="T200" style={{ opacity: 0.8 }}>
+          Set how your name appears on dark and light themes (MSC4522). Other clients that support this
+          spec will see your chosen colors.
         </Text>
+
+        <Box gap="400" wrap="Wrap">
+          <Box direction="Column" gap="200">
+            <Text size="T300">On dark themes</Text>
+            <Text size="T200" style={{ opacity: 0.7 }}>Bright colors work best</Text>
+            <HexColorPicker color={localOnDark} onChange={(c) => { setLocalOnDark(c); setColorError(undefined); }} />
+            <Input
+              size="300"
+              variant="Secondary"
+              style={{ width: toRem(120) }}
+              value={localOnDark}
+              onChange={(e) => {
+                setLocalOnDark(e.target.value);
+                setColorError(undefined);
+              }}
+            />
             <Box
               style={{
                 width: toRem(48),
                 height: toRem(48),
-                  borderRadius: '50%',
-                  border: `${toRem(4)} solid ${rgbaToHex(localBorderColor)}`,
-                  backgroundColor: color.Surface.Container,
-                }}
-              />
-              <Box gap="100">
-                <Button
-                  size="300"
-                  variant="Primary"
-                  fill="Solid"
-                  radii="300"
-                  onClick={handleBorderColorSave}
-                  disabled={savingStyle}
-                >
-                  <Text size="B300">Save</Text>
-                </Button>
-                {profileStyle.avatarBorderColor && (
-                  <Button
-                    size="300"
-                    variant="Critical"
-                    fill="Soft"
-                    radii="300"
-                    onClick={handleBorderColorRemove}
-                    disabled={savingStyle}
-                  >
-                    <Text size="B300">Remove</Text>
-                  </Button>
-                )}
-              </Box>
-            </Box>
-          </Box>
-        </Box>
-
-        {/* Profile Gradient */}
-        <Box direction="Column" gap="100">
-          <Text size="T300">Profile Card Gradient</Text>
-          <Box gap="200" alignItems="Start" wrap="Wrap">
-            <Box direction="Column" gap="100">
-              <Text size="T200">Start Color</Text>
-              <RgbaColorPicker color={localGradientStart} onChange={(c) => { setLocalGradientStart(c); setEditingGradient(true); }} />
-            </Box>
-            <Box direction="Column" gap="100">
-              <Text size="T200">End Color</Text>
-              <RgbaColorPicker color={localGradientStop} onChange={(c) => { setLocalGradientStop(c); setEditingGradient(true); }} />
-            </Box>
-            <Box direction="Column" gap="100">
-              <Text size="T200">Direction</Text>
-              <AngleSelector
-                value={localGradientDirection}
-                onChange={(deg) => { setLocalGradientDirection(deg); setEditingGradient(true); }}
-              />
-              <Box
-                style={{
-                  width: toRem(100),
-                  height: toRem(60),
                 borderRadius: toRem(8),
-                  background: `linear-gradient(${localGradientDirection}deg, ${rgbaToHex(localGradientStart)}, ${rgbaToHex(localGradientStop)})`,
+                backgroundColor: localOnDark,
                 border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
               }}
             />
-              <Box gap="100">
+          </Box>
+
+          <Box direction="Column" gap="200">
+            <Text size="T300">On light themes</Text>
+            <Text size="T200" style={{ opacity: 0.7 }}>Darker colors work best</Text>
+            <HexColorPicker color={localOnLight} onChange={(c) => { setLocalOnLight(c); setColorError(undefined); }} />
+            <Input
+              size="300"
+              variant="Secondary"
+              style={{ width: toRem(120) }}
+              value={localOnLight}
+              onChange={(e) => {
+                setLocalOnLight(e.target.value);
+                setColorError(undefined);
+              }}
+            />
+            <Box
+              style={{
+                width: toRem(48),
+                height: toRem(48),
+                borderRadius: toRem(8),
+                backgroundColor: localOnLight,
+                border: `${toRem(1)} solid ${color.Surface.ContainerLine}`,
+              }}
+            />
+          </Box>
+        </Box>
+
+        <Box gap="200" alignItems="Center" wrap="Wrap">
           <Button
             size="300"
             variant="Primary"
             fill="Solid"
             radii="300"
-                  onClick={handleGradientSave}
-                  disabled={savingStyle}
+            onClick={handleColorSave}
+            disabled={savingColor || colorLoading}
           >
-                  <Text size="B300">Save</Text>
+            <Text size="B300">{savingColor ? 'Saving...' : 'Save colors'}</Text>
           </Button>
-                {profileStyle.gradient && (
+          {hasSavedColors && (
             <Button
               size="300"
               variant="Critical"
               fill="Soft"
               radii="300"
-                    onClick={handleGradientRemove}
-                    disabled={savingStyle}
+              onClick={handleColorRemove}
+              disabled={savingColor}
             >
-                    <Text size="B300">Remove</Text>
+              <Text size="B300">Remove colors</Text>
             </Button>
           )}
         </Box>
-            </Box>
-          </Box>
-        </Box>
 
-        {styleError && (
-          <Text size="T200" style={{ color: color.Critical.Main }}>{styleError}</Text>
+        {colorError && (
+          <Text size="T200" style={{ color: color.Critical.Main }}>{colorError}</Text>
         )}
       </Box>
 

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/useUserBanner.ts

@@ -1,56 +1,17 @@
 import { useCallback, useEffect, useState } from 'react';
-import { MatrixClient, UserEvent, UserEventHandlerMap } from 'matrix-js-sdk';
 import { useMatrixClient } from './useMatrixClient';
 import { useMediaAuthentication } from './useMediaAuthentication';
 import { mxcUrlToHttp } from '../utils/matrix';
 import { getCurrentAccessToken } from '../utils/auth';
 import {
-  fetchAndExtractMetadata,
-  extractMetadataFromImage,
-  embedMetadataInImage,
-  detectImageFormat,
-  getMimeType,
-  getExtension,
-  ImageMetadata,
-  convertImageDataToPng,
-  uint8ArrayToBlob,
-} from '../utils/imageMetadata';
+  deleteBannerUrl,
+  loadBannerUrl,
+  registerBannerCacheClear,
+  saveBannerUrl,
+} from '../utils/profileFields';
 
 /**
- * Fetches the user's current avatar as raw image data
- */
-async function fetchAvatarData(
-  mx: MatrixClient,
-  avatarMxc: string,
-  useAuthentication: boolean
-): Promise<ArrayBuffer | null> {
-  const url = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-  if (!url) return null;
-
-  try {
-    // Always use current session's token to avoid stale tokens during account switches
-    const accessToken = getCurrentAccessToken();
-    let response = await fetch(url, {
-      method: 'GET',
-      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) {
-      response = await fetch(url, { method: 'GET' });
-    }
-    
-    if (!response.ok) return null;
-    return await response.arrayBuffer();
-  } catch {
-    return null;
-  }
-}
-
-/**
- * Hook to manage the user's chosen profile banner, stored in avatar image metadata
- * The banner URL is embedded in avatar metadata and syncs via the avatar
- * @returns The current banner URL, a setter function, and loading state
+ * Hook to manage the user's profile banner (MSC4427 via MSC4133).
  */
 export function useUserBanner(): [
   string | undefined,
@@ -58,254 +19,67 @@ export function useUserBanner(): [
   boolean
 ] {
   const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
   const [banner, setBanner] = useState<string | undefined>();
   const [loading, setLoading] = useState(true);
 
-  // Extract banner from current avatar on mount and when profile changes
   useEffect(() => {
-    const loadBanner = async () => {
+    const userId = mx.getUserId();
+    if (!userId) {
+      setLoading(false);
+      return undefined;
+    }
+
+    let cancelled = false;
+
+    const load = async () => {
       setLoading(true);
       try {
-        const userId = mx.getUserId();
-        if (!userId) {
-          setLoading(false);
-          return;
-        }
-
-        const profile = await mx.getProfileInfo(userId);
-        const avatarUrl = profile.avatar_url;
-        console.log('[useUserBanner.loadBanner] Loading banner from avatar:', avatarUrl);
-        
-        if (!avatarUrl) {
-          setBanner(undefined);
-          setLoading(false);
-          return;
-        }
-
-        const httpUrl = mxcUrlToHttp(mx, avatarUrl, useAuthentication);
-        if (!httpUrl) {
-          setBanner(undefined);
-          setLoading(false);
-          return;
-        }
-
-        // Always use current session's token to avoid stale tokens during account switches
-        const accessToken = getCurrentAccessToken();
-        const metadata = await fetchAndExtractMetadata(httpUrl, useAuthentication ? accessToken : null);
-        console.log('[useUserBanner.loadBanner] Extracted banner:', metadata.banner);
-        setBanner(metadata.banner);
+        const bannerMxc = await loadBannerUrl(mx, userId);
+        if (!cancelled) setBanner(bannerMxc);
       } catch {
-        setBanner(undefined);
+        if (!cancelled) setBanner(undefined);
       }
-      setLoading(false);
+      if (!cancelled) setLoading(false);
     };
 
-    loadBanner();
-
-    // Listen for avatar changes and reload banner
-    const userId = mx.getUserId();
-    if (!userId) return undefined;
-    
-    const user = mx.getUser(userId);
-    const onAvatarChange: UserEventHandlerMap[UserEvent.AvatarUrl] = (newAvatarUrl) => {
-      console.log('[useUserBanner] Avatar changed event fired, new URL:', newAvatarUrl);
-      loadBanner();
-    };
-
-    user?.on(UserEvent.AvatarUrl, onAvatarChange);
-    
+    load();
     return () => {
-      user?.removeListener(UserEvent.AvatarUrl, onAvatarChange);
+      cancelled = true;
     };
-  }, [mx, useAuthentication]);
+  }, [mx]);
 
-  const updateBanner = useCallback(async (newBanner: string | undefined) => {
-    const userId = mx.getUserId();
-    if (!userId) {
-      throw new Error('No user ID');
+  const updateBanner = useCallback(
+    async (newBanner: string | undefined) => {
+      if (!newBanner) {
+        await deleteBannerUrl(mx);
+        setBanner(undefined);
+        return;
       }
 
-    const profile = await mx.getProfileInfo(userId);
-    const avatarUrl = profile.avatar_url;
-
-    if (!avatarUrl) {
-      throw new Error('No avatar set. Please upload an avatar first.');
-    }
-
-    // Fetch current avatar
-    const avatarData = await fetchAvatarData(mx, avatarUrl, useAuthentication);
-    if (!avatarData) {
-      throw new Error('Failed to fetch current avatar');
-    }
-
-    // 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(workingData);
-    console.log('[updateBanner] Existing metadata:', existingMetadata);
-
-    // 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 ?? '',
-      avatarBorderColor: existingMetadata.avatarBorderColor,
-      gradient: existingMetadata.gradient,
-    };
-    console.log('[updateBanner] New metadata to embed:', newMetadata);
-
-    const newAvatarData = embedMetadataInImage(workingData, newMetadata);
-
-    if (!newAvatarData) {
-      throw new Error('Failed to embed banner in avatar metadata');
-    }
-
-    // Verify the banner was embedded correctly before uploading
-    const verifyMetadata = extractMetadataFromImage(newAvatarData);
-    console.log('[updateBanner] Verification - extracted metadata from new avatar:', verifyMetadata);
-
-    if ((newBanner || undefined) !== verifyMetadata.banner) {
-      console.error('[updateBanner] Banner verification FAILED!', 'Expected:', newBanner, 'Got:', verifyMetadata.banner);
-      throw new Error('Banner verification failed');
-    }
-    console.log('[updateBanner] Banner verification passed');
-
-    // Upload modified avatar with correct MIME type
-    const mimeType = getMimeType(format);
-    const extension = getExtension(format);
-    const blob = uint8ArrayToBlob(newAvatarData, mimeType);
-
-    const uploadResponse = await mx.uploadContent(blob, {
-      name: `avatar.${extension}`,
-      type: mimeType,
-    });
-    console.log('[updateBanner] Avatar uploaded successfully, MXC:', uploadResponse.content_uri);
-
-    // Update profile with new avatar
-    try {
-      console.log('[updateBanner] Setting avatar URL to:', uploadResponse.content_uri);
-      await Promise.race([
-        mx.setAvatarUrl(uploadResponse.content_uri),
-        new Promise((_, reject) => {
-          setTimeout(() => reject(new Error('setAvatarUrl timeout')), 30000);
-        })
-      ]);
-      console.log('[updateBanner] setAvatarUrl completed');
-      
-      // Manually sync user object to ensure event listeners are triggered
-      const user = mx.getUser(userId);
-      if (user && user.avatarUrl !== uploadResponse.content_uri) {
-        console.log('[updateBanner] Manually syncing user avatar URL');
-        user.setAvatarUrl(uploadResponse.content_uri);
-      }
-      console.log('[updateBanner] Banner update complete');
-    } catch (error) {
-      throw new Error(`Failed to update avatar URL: ${error instanceof Error ? error.message : 'Unknown error'}`);
-    }
-
-    // Note: Don't set banner here - let the avatar change event handle it
-    // setBanner(newBanner);
-  }, [mx, useAuthentication]);
+      await saveBannerUrl(mx, newBanner);
+      setBanner(newBanner);
+    },
+    [mx]
+  );
 
   return [banner, updateBanner, loading];
 }
 
-// Cache for user banners to avoid refetching for each message
 const userBannerCache = new Map<string, { bannerMxc: string | undefined; timestamp: number }>();
-const CACHE_TTL_MS = 5 * 60 * 1000; // 5 minutes
+const CACHE_TTL_MS = 5 * 60 * 1000;
 
-/**
- * Hook to get another user's chosen profile banner from their avatar metadata
- * @param userId - The user ID to get banner for
- * @param avatarMxc - The user's avatar MXC URL
- * @returns The user's chosen banner as a blob URL or undefined
- */
-export function useOtherUserBanner(userId: string, avatarMxc: string | undefined): string | undefined {
-  const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
-  const [bannerBlobUrl, setBannerBlobUrl] = useState<string | undefined>();
+registerBannerCacheClear((userId: string) => {
+  userBannerCache.delete(userId);
+});
 
-  useEffect(() => {
-    let blobUrl: string | undefined;
-
-    if (!avatarMxc) {
-      console.log('[useOtherUserBanner] No avatarMxc provided for', userId);
-      setBannerBlobUrl(undefined);
-      return undefined;
-    }
-
-    const loadBanner = async () => {
-      console.log('[useOtherUserBanner] Loading banner for', userId, 'avatarMxc:', avatarMxc);
-      
-      // Check cache first
-      const cacheKey = `${userId}:${avatarMxc}`;
-      const cached = userBannerCache.get(cacheKey);
-      
-      let bannerMxc: string | undefined;
-      
-      if (cached && Date.now() - cached.timestamp < CACHE_TTL_MS) {
-        // Use cached banner MXC
-        console.log('[useOtherUserBanner] Using cached bannerMxc:', cached.bannerMxc);
-        bannerMxc = cached.bannerMxc;
-      } else {
-        // Fetch banner MXC from avatar metadata
-        const httpUrl = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-        console.log('[useOtherUserBanner] Fetching metadata from:', httpUrl);
-        
-        if (!httpUrl) {
-          console.log('[useOtherUserBanner] Failed to get HTTP URL');
-          setBannerBlobUrl(undefined);
-          return;
-        }
-
-        // Always use current session's token to avoid stale tokens during account switches
-        const accessToken = getCurrentAccessToken();
-        const metadata = await fetchAndExtractMetadata(httpUrl, useAuthentication ? accessToken : null);
-        
-        console.log('[useOtherUserBanner] Extracted metadata:', metadata);
-        
-        bannerMxc = metadata.banner;
-        
-        // Cache the banner MXC (not the blob URL)
-        userBannerCache.set(cacheKey, { bannerMxc, timestamp: Date.now() });
-      }
-      
-      if (!bannerMxc) {
-        console.log('[useOtherUserBanner] No banner MXC found');
-        setBannerBlobUrl(undefined);
-        return;
-      }
-
-      console.log('[useOtherUserBanner] Fetching banner image from MXC:', bannerMxc);
-      
-      // Fetch the banner image data with authentication
+async function fetchBannerBlobUrl(
+  mx: ReturnType<typeof useMatrixClient>,
+  bannerMxc: string,
+  useAuthentication: boolean
+): Promise<string | undefined> {
   const bannerHttpUrl = mxcUrlToHttp(mx, bannerMxc, useAuthentication);
-      if (!bannerHttpUrl) {
-        console.log('[useOtherUserBanner] Failed to convert banner MXC to HTTP URL');
-        setBannerBlobUrl(undefined);
-        return;
-      }
+  if (!bannerHttpUrl) return undefined;
 
-      console.log('[useOtherUserBanner] Banner HTTP URL:', bannerHttpUrl);
-
-      // Always use current session's token to avoid stale tokens during account switches
   const accessToken = getCurrentAccessToken();
   const headers: HeadersInit = {};
   if (useAuthentication && accessToken) {
@@ -313,25 +87,56 @@ export function useOtherUserBanner(userId: string, avatarMxc: string | undefined
   }
 
   const response = await fetch(bannerHttpUrl, { headers });
-      if (!response.ok) {
+  if (!response.ok) return undefined;
+
+  const blob = await response.blob();
+  return URL.createObjectURL(blob);
+}
+
+/**
+ * Hook to get another user's profile banner as a blob URL.
+ */
+export function useOtherUserBanner(userId: string): string | undefined {
+  const mx = useMatrixClient();
+  const useAuthentication = useMediaAuthentication();
+  const [bannerBlobUrl, setBannerBlobUrl] = useState<string | undefined>();
+
+  useEffect(() => {
+    if (!userId) {
       setBannerBlobUrl(undefined);
+      return undefined;
+    }
+
+    let blobUrl: string | undefined;
+    let cancelled = false;
+
+    const load = async () => {
+      const cached = userBannerCache.get(userId);
+      let bannerMxc: string | undefined;
+
+      if (cached && Date.now() - cached.timestamp < CACHE_TTL_MS) {
+        bannerMxc = cached.bannerMxc;
+      } else {
+        bannerMxc = await loadBannerUrl(mx, userId);
+        userBannerCache.set(userId, { bannerMxc, timestamp: Date.now() });
+      }
+
+      if (!bannerMxc) {
+        if (!cancelled) setBannerBlobUrl(undefined);
         return;
       }
 
-      const blob = await response.blob();
-      blobUrl = URL.createObjectURL(blob);
-      setBannerBlobUrl(blobUrl);
+      blobUrl = await fetchBannerBlobUrl(mx, bannerMxc, useAuthentication);
+      if (!cancelled) setBannerBlobUrl(blobUrl);
     };
 
-    loadBanner();
+    load();
 
-    // Cleanup blob URL when component unmounts or deps change
     return () => {
-      if (blobUrl) {
-        URL.revokeObjectURL(blobUrl);
-      }
+      cancelled = true;
+      if (blobUrl) URL.revokeObjectURL(blobUrl);
     };
-  }, [mx, useAuthentication, avatarMxc, userId]);
+  }, [mx, useAuthentication, userId]);
 
   return bannerBlobUrl;
 }

src/app/hooks/useUserColor.ts

@@ -1,227 +1,82 @@
 import { useCallback, useEffect, useState } from 'react';
-import { MatrixClient, UserEvent, UserEventHandlerMap } from 'matrix-js-sdk';
+import { Room } from 'matrix-js-sdk';
 import { useMatrixClient } from './useMatrixClient';
-import { useMediaAuthentication } from './useMediaAuthentication';
-import { mxcUrlToHttp } from '../utils/matrix';
-import { getCurrentAccessToken } from '../utils/auth';
+import { ThemeKind, useTheme } from './useTheme';
 import {
-  embedColorInImage,
-  extractColorFromImage,
-  removeColorFromImage,
-  fetchAndExtractColor,
-  detectImageFormat,
-  getMimeType,
-  getExtension,
-  uint8ArrayToBlob,
-} from '../utils/imageMetadata';
+  ColorPreference,
+  deleteColorPreference,
+  extractMemberColorPreference,
+  hasColorPreference,
+  loadColorPreference,
+  registerPreferenceCacheClear,
+  resolveColorForTheme,
+  saveColorPreference,
+} from '../utils/profileFields';
 
 /**
- * Fetches the user's current avatar as raw image data
+ * Hook to manage the user's MSC4522 color preference on their global profile.
  */
-async function fetchAvatarData(
-  mx: MatrixClient,
-  avatarMxc: string,
-  useAuthentication: boolean
-): Promise<ArrayBuffer | null> {
-  const url = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-  if (!url) return null;
-
-  try {
-    // Always use current session's token to avoid stale tokens during account switches
-    const accessToken = getCurrentAccessToken();
-    let response = await fetch(url, {
-      method: 'GET',
-      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('[fetchAvatarData] Auth failed (401), attempting unauthenticated fallback');
-      response = await fetch(url, { method: 'GET' });
-    }
-    
-    if (!response.ok) return null;
-    return await response.arrayBuffer();
-  } catch {
-    return null;
-  }
-}
-
-/**
- * Hook to manage the user's chosen profile color, stored in avatar image metadata
- * The color is embedded in PNG tEXt chunk or WebP XMP chunk and syncs via the avatar
- * @returns The current color, a setter function, and loading state
- */
-export function useUserColor(): [
-  string | undefined,
-  (color: string | undefined) => Promise<void>,
+export function useUserColorPreference(): [
+  ColorPreference | undefined,
+  (preference: ColorPreference | undefined) => Promise<void>,
   boolean
 ] {
   const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
-  const [color, setColor] = useState<string | undefined>();
+  const [preference, setPreference] = useState<ColorPreference | undefined>();
   const [loading, setLoading] = useState(true);
 
-  // Extract color from current avatar on mount and when profile changes
   useEffect(() => {
-    const loadColor = async () => {
-      setLoading(true);
-      try {
     const userId = mx.getUserId();
     if (!userId) {
       setLoading(false);
-          return;
+      return undefined;
     }
 
-        const profile = await mx.getProfileInfo(userId);
-        const avatarUrl = profile.avatar_url;
-        
-        if (!avatarUrl) {
-          setColor(undefined);
-          setLoading(false);
-          return;
-        }
-
-        const httpUrl = mxcUrlToHttp(mx, avatarUrl, useAuthentication);
-        if (!httpUrl) {
-          setColor(undefined);
-          setLoading(false);
-          return;
-        }
-
-        // Always use current session's token to avoid stale tokens during account switches
-        const accessToken = getCurrentAccessToken();
-        const extractedColor = await fetchAndExtractColor(httpUrl, useAuthentication ? accessToken : null);
-        setColor(extractedColor);
-      } catch (e) {
-        console.error('Failed to load user color from avatar:', e);
-        setColor(undefined);
-      }
-      setLoading(false);
-    };
-
-    loadColor();
-
-    // Listen for avatar changes and reload color
-    const userId = mx.getUserId();
-    if (!userId) return undefined;
-    
-    const user = mx.getUser(userId);
-    const onAvatarChange: UserEventHandlerMap[UserEvent.AvatarUrl] = () => {
-      loadColor();
-    };
-
-    user?.on(UserEvent.AvatarUrl, onAvatarChange);
-    
-    return () => {
-      user?.removeListener(UserEvent.AvatarUrl, onAvatarChange);
-    };
-  }, [mx, useAuthentication]);
-
-  const updateColor = useCallback(async (newColor: string | undefined) => {
-    const userId = mx.getUserId();
-    if (!userId) return;
+    let cancelled = false;
 
+    const load = async () => {
+      setLoading(true);
       try {
-      const profile = await mx.getProfileInfo(userId);
-      const avatarUrl = profile.avatar_url;
-
-      if (!avatarUrl) {
-        // No avatar to embed color in
-        console.warn('Cannot set color: no avatar image set');
-        throw new Error('No avatar set');
-      }
-
-      // Fetch current avatar
-      const avatarData = await fetchAvatarData(mx, avatarUrl, useAuthentication);
-      if (!avatarData) {
-        console.error('Failed to fetch current avatar');
-        throw new Error('Failed to fetch avatar');
-      }
-
-      console.log('Original avatar size:', avatarData.byteLength, 'bytes');
-
-      // Detect image format
-      const format = detectImageFormat(avatarData);
-      console.log('Detected image format:', format);
-      
-      if (format === 'unknown') {
-        console.error('Unsupported avatar image format - must be PNG, WebP, JPEG, or GIF');
-        throw new Error('Unsupported image format');
-      }
-
-      // Modify image metadata
-      let newAvatarData: Uint8Array | null;
-      if (newColor) {
-        newAvatarData = embedColorInImage(avatarData, newColor);
-      } else {
-        newAvatarData = removeColorFromImage(avatarData);
-      }
-
-      if (!newAvatarData) {
-        console.error('Failed to modify avatar image metadata');
-        throw new Error('Failed to modify image metadata');
-      }
-
-      console.log('Modified avatar size:', newAvatarData.byteLength, 'bytes');
-
-      // Verify the color was embedded correctly before uploading
-      const verifyColor = extractColorFromImage(newAvatarData);
-      console.log('Verification - embedded color:', verifyColor);
-      
-      if (newColor && verifyColor !== newColor) {
-        console.error('Color verification failed! Expected:', newColor, 'Got:', verifyColor);
-        throw new Error('Color embedding verification failed');
-      }
-
-      // Upload modified avatar with correct MIME type
-      const mimeType = getMimeType(format);
-      const extension = getExtension(format);
-      const blob = uint8ArrayToBlob(newAvatarData, mimeType);
-      const uploadResponse = await mx.uploadContent(blob, {
-        name: `avatar.${extension}`,
-        type: mimeType,
-      });
-
-      console.log('Uploaded new avatar:', uploadResponse.content_uri);
-
-      // Update profile with new avatar
-      await mx.setAvatarUrl(uploadResponse.content_uri);
-
-      // Manually sync user object to ensure event listeners are triggered
-      const user = mx.getUser(userId);
-      if (user && user.avatarUrl !== uploadResponse.content_uri) {
-        user.setAvatarUrl(uploadResponse.content_uri);
-      }
-
-      setColor(newColor);
-      console.log('User color updated in avatar:', newColor);
+        const loaded = await loadColorPreference(mx, userId);
+        if (!cancelled) setPreference(loaded);
       } catch (e) {
-      console.error('Failed to update user color in avatar:', e);
-      throw e;
+        console.error('Failed to load color preference:', e);
+        if (!cancelled) setPreference(undefined);
       }
-  }, [mx, useAuthentication]);
+      if (!cancelled) setLoading(false);
+    };
 
-  return [color, updateColor, loading];
+    load();
+    return () => {
+      cancelled = true;
+    };
+  }, [mx]);
+
+  const updatePreference = useCallback(
+    async (newPreference: ColorPreference | undefined) => {
+      if (!hasColorPreference(newPreference)) {
+        await deleteColorPreference(mx);
+        setPreference(undefined);
+        return;
+      }
+
+      await saveColorPreference(mx, newPreference!);
+      setPreference(newPreference);
+    },
+    [mx]
+  );
+
+  return [preference, updatePreference, loading];
 }
 
-/**
- * LRU Cache implementation with max size limit
- */
 class LRUCache<K, V> {
-  private cache: Map<K, V>;
+  private cache = new Map<K, V>();
 
-  private maxSize: number;
-
-  constructor(maxSize: number) {
-    this.cache = new Map();
-    this.maxSize = maxSize;
-  }
+  constructor(private maxSize: number) {}
 
   get(key: K): V | undefined {
     const value = this.cache.get(key);
     if (value !== undefined) {
-      // Move to end (most recently used)
       this.cache.delete(key);
       this.cache.set(key, value);
     }
@@ -229,88 +84,106 @@ class LRUCache<K, V> {
   }
 
   set(key: K, value: V): void {
-    // If key exists, delete it first to re-add at end
     if (this.cache.has(key)) {
       this.cache.delete(key);
-    }
-    // If at max size, remove oldest (first) entry
-    else if (this.cache.size >= this.maxSize) {
+    } else if (this.cache.size >= this.maxSize) {
       const firstKey = this.cache.keys().next().value;
-      if (firstKey !== undefined) {
-        this.cache.delete(firstKey);
-      }
+      if (firstKey !== undefined) this.cache.delete(firstKey);
     }
     this.cache.set(key, value);
   }
 
-  clear(): void {
-    this.cache.clear();
+  delete(key: K): void {
+    this.cache.delete(key);
   }
 }
 
-// LRU cache for user colors to avoid refetching for each message
-const userColorCache = new LRUCache<string, { color: string | undefined; timestamp: number }>(100);
-const CACHE_TTL_MS = 30 * 60 * 1000; // 30 minutes
+const preferenceCache = new LRUCache<string, { preference: ColorPreference | undefined; timestamp: number }>(200);
+const CACHE_TTL_MS = 30 * 60 * 1000;
+
+registerPreferenceCacheClear((userId: string) => {
+  preferenceCache.delete(userId);
+});
 
 /**
- * Hook to get another user's chosen profile color from their avatar metadata
- * @param userId - The user ID to get color for
- * @param avatarMxc - The user's avatar MXC URL
- * @returns The user's chosen color or undefined
+ * Hook to get another user's MSC4522 color preference from their global profile.
  */
-export function useOtherUserColor(userId: string, avatarMxc: string | undefined): string | undefined {
+export function useOtherUserColorPreference(userId: string): ColorPreference | undefined {
   const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
+  const cachedEntry = preferenceCache.get(userId);
+  const cachedPreference =
+    cachedEntry && Date.now() - cachedEntry.timestamp < CACHE_TTL_MS ? cachedEntry.preference : undefined;
 
-  // Check cache synchronously BEFORE initializing state to avoid flash
-  const cacheKey = avatarMxc ? `${userId}:${avatarMxc}` : '';
-  const cachedEntry = cacheKey ? userColorCache.get(cacheKey) : undefined;
-  const cachedColor = cachedEntry && Date.now() - cachedEntry.timestamp < CACHE_TTL_MS 
-    ? cachedEntry.color 
-    : undefined;
-  
-  const [color, setColor] = useState<string | undefined>(cachedColor);
+  const [preference, setPreference] = useState<ColorPreference | undefined>(cachedPreference);
 
   useEffect(() => {
-    if (!avatarMxc) {
-      console.log('[useOtherUserColor] No avatarMxc provided for', userId);
-      setColor(undefined);
+    if (!userId) {
+      setPreference(undefined);
       return;
     }
 
-    // Check cache first
-    const cacheKey = `${userId}:${avatarMxc}`;
-    const cached = userColorCache.get(cacheKey);
+    const cached = preferenceCache.get(userId);
     if (cached && Date.now() - cached.timestamp < CACHE_TTL_MS) {
-      console.log('[useOtherUserColor] Using cached color for', userId, ':', cached.color);
-      setColor(cached.color);
+      setPreference(cached.preference);
       return;
     }
 
-    const loadColor = async () => {
-      const httpUrl = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-      console.log('[useOtherUserColor] Loading color for', userId, 'from', httpUrl);
-      if (!httpUrl) {
-        console.log('[useOtherUserColor] Failed to get HTTP URL for', avatarMxc);
-        setColor(undefined);
-        return;
+    let cancelled = false;
+
+    const load = async () => {
+      try {
+        const loaded = await loadColorPreference(mx, userId);
+        preferenceCache.set(userId, { preference: loaded, timestamp: Date.now() });
+        if (!cancelled) setPreference(loaded);
+      } catch {
+        if (!cancelled) setPreference(undefined);
       }
-
-      // Always use current session's token to avoid stale tokens during account switches
-      const accessToken = getCurrentAccessToken();
-      const extractedColor = await fetchAndExtractColor(httpUrl, useAuthentication ? accessToken : null);
-      
-      console.log('[useOtherUserColor] Extracted color for', userId, ':', extractedColor);
-      
-      // Cache the result
-      userColorCache.set(cacheKey, { color: extractedColor, timestamp: Date.now() });
-      
-      setColor(extractedColor);
     };
 
-    loadColor();
-  }, [mx, useAuthentication, avatarMxc, userId]);
+    load();
+    return () => {
+      cancelled = true;
+    };
+  }, [mx, userId]);
 
-  return color;
+  return preference;
 }
 
+/**
+ * MSC4522 per-room member color preference (overrides global profile when set).
+ */
+export function useMemberColorPreference(userId: string, room?: Room): ColorPreference | undefined {
+  const [preference, setPreference] = useState<ColorPreference | undefined>(() =>
+    extractMemberColorPreference(room, userId)
+  );
+
+  useEffect(() => {
+    setPreference(extractMemberColorPreference(room, userId));
+  }, [room, userId]);
+
+  return preference;
+}
+
+/**
+ * Resolve a user's username color for the active theme (MSC4522).
+ * Per-room member colors take precedence over global profile colors.
+ */
+export function useOtherUserColor(userId: string, room?: Room): string | undefined {
+  const theme = useTheme();
+  const profilePreference = useOtherUserColorPreference(userId);
+  const memberPreference = useMemberColorPreference(userId, room);
+  const preference = memberPreference ?? profilePreference;
+  return resolveColorForTheme(preference, theme.kind);
+}
+
+/**
+ * Resolve the current user's username color for the active theme.
+ */
+export function useUsernameColor(userId: string, room?: Room, themeKind?: ThemeKind): string | undefined {
+  const theme = useTheme();
+  const kind = themeKind ?? theme.kind;
+  const profilePreference = useOtherUserColorPreference(userId);
+  const memberPreference = useMemberColorPreference(userId, room);
+  const preference = memberPreference ?? profilePreference;
+  return resolveColorForTheme(preference, kind);
+}

src/app/hooks/useUserProfileStyle.ts

@@ -1,276 +0,0 @@
-import { useCallback, useEffect, useState } from 'react';
-import { UserEvent, UserEventHandlerMap } from 'matrix-js-sdk';
-import { useMatrixClient } from './useMatrixClient';
-import { useMediaAuthentication } from './useMediaAuthentication';
-import { mxcUrlToHttp } from '../utils/matrix';import { getCurrentAccessToken } from '../utils/auth';import {
-  fetchAndExtractMetadata,
-  extractMetadataFromImage,
-  embedMetadataInImage,
-  detectImageFormat,
-  getMimeType,
-  getExtension,
-  ImageMetadata,
-  ProfileGradient,
-  convertImageDataToPng,
-  uint8ArrayToBlob,
-} from '../utils/imageMetadata';
-
-/**
- * Fetches the user's current avatar as raw image data
- */
-async function fetchAvatarData(
-  mx: ReturnType<typeof useMatrixClient>,
-  avatarMxc: string,
-  useAuthentication: boolean
-): Promise<ArrayBuffer | null> {
-  const url = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-  if (!url) return null;
-
-  try {
-    // Always use current session's token to avoid stale tokens during account switches
-    const accessToken = getCurrentAccessToken();
-    let response = await fetch(url, {
-      method: 'GET',
-      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) {
-      response = await fetch(url, { method: 'GET' });
-    }
-    
-    if (!response.ok) return null;
-    return await response.arrayBuffer();
-  } catch {
-    return null;
-  }
-}
-
-export type ProfileStyleData = {
-  avatarBorderColor?: string;
-  gradient?: ProfileGradient;
-};
-
-/**
- * Hook to manage the user's profile style (avatar border color and gradient)
- * Stored in avatar image metadata
- * @returns Current style data, a setter function, and loading state
- */
-export function useUserProfileStyle(): [
-  ProfileStyleData,
-  (style: Partial<ProfileStyleData>) => Promise<void>,
-  boolean
-] {
-  const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
-  const [style, setStyle] = useState<ProfileStyleData>({});
-  const [loading, setLoading] = useState(true);
-
-  // Extract style from current avatar on mount and when profile changes
-  useEffect(() => {
-    const loadStyle = async () => {
-      setLoading(true);
-      try {
-        const userId = mx.getUserId();
-        if (!userId) {
-          setLoading(false);
-          return;
-        }
-
-        const profile = await mx.getProfileInfo(userId);
-        const avatarUrl = profile.avatar_url;
-
-        if (!avatarUrl) {
-          setStyle({});
-          setLoading(false);
-          return;
-        }
-
-        const httpUrl = mxcUrlToHttp(mx, avatarUrl, useAuthentication);
-        if (!httpUrl) {
-          setStyle({});
-          setLoading(false);
-          return;
-        }
-
-        // Always use current session's token to avoid stale tokens during account switches
-        const accessToken = getCurrentAccessToken();
-        const metadata = await fetchAndExtractMetadata(httpUrl, useAuthentication ? accessToken : null);
-        setStyle({
-          avatarBorderColor: metadata.avatarBorderColor,
-          gradient: metadata.gradient,
-        });
-      } catch {
-        setStyle({});
-      }
-      setLoading(false);
-    };
-
-    loadStyle();
-
-    // Listen for avatar changes and reload style
-    const userId = mx.getUserId();
-    if (!userId) return undefined;
-
-    const user = mx.getUser(userId);
-    const onAvatarChange: UserEventHandlerMap[UserEvent.AvatarUrl] = () => {
-      loadStyle();
-    };
-
-    user?.on(UserEvent.AvatarUrl, onAvatarChange);
-
-    return () => {
-      user?.removeListener(UserEvent.AvatarUrl, onAvatarChange);
-    };
-  }, [mx, useAuthentication]);
-
-  const updateStyle = useCallback(
-    async (newStyle: Partial<ProfileStyleData>) => {
-      const userId = mx.getUserId();
-      if (!userId) {
-        throw new Error('No user ID');
-      }
-
-      const profile = await mx.getProfileInfo(userId);
-      const avatarUrl = profile.avatar_url;
-
-      if (!avatarUrl) {
-        throw new Error('No avatar set. Please upload an avatar first.');
-      }
-
-      // Fetch current avatar
-      const avatarData = await fetchAvatarData(mx, avatarUrl, useAuthentication);
-      if (!avatarData) {
-        throw new Error('Failed to fetch current avatar');
-      }
-
-      // 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(workingData);
-
-      // Merge with new style
-      const newMetadata: ImageMetadata = {
-        ...existingMetadata,
-        avatarBorderColor: newStyle.avatarBorderColor !== undefined ? newStyle.avatarBorderColor : existingMetadata.avatarBorderColor,
-        gradient: newStyle.gradient !== undefined ? newStyle.gradient : existingMetadata.gradient,
-      };
-
-      // Embed updated metadata
-      const newAvatarData = embedMetadataInImage(workingData, newMetadata);
-      if (!newAvatarData) {
-        throw new Error('Failed to embed style in avatar metadata');
-      }
-
-      // Upload modified avatar with correct MIME type
-      const mimeType = getMimeType(format);
-      const extension = getExtension(format);
-      const blob = uint8ArrayToBlob(newAvatarData, mimeType);
-
-      const uploadResponse = await mx.uploadContent(blob, {
-        name: `avatar.${extension}`,
-        type: mimeType,
-      });
-
-      // Update profile with new avatar
-      await mx.setAvatarUrl(uploadResponse.content_uri);
-
-      // Manually sync user object
-      const user = mx.getUser(userId);
-      if (user && user.avatarUrl !== uploadResponse.content_uri) {
-        user.setAvatarUrl(uploadResponse.content_uri);
-      }
-
-      // Update local state
-      setStyle((prev) => ({
-        ...prev,
-        ...newStyle,
-      }));
-    },
-    [mx, useAuthentication]
-  );
-
-  return [style, updateStyle, loading];
-}
-
-// Cache for other users' profile styles
-const userStyleCache = new Map<string, { style: ProfileStyleData; timestamp: number }>();
-const CACHE_TTL_MS = 5 * 60 * 1000; // 5 minutes
-
-/**
- * Hook to get another user's profile style from their avatar metadata
- * @param userId - The user ID to get style for
- * @param avatarMxc - The user's avatar MXC URL
- * @returns The user's profile style data
- */
-export function useOtherUserProfileStyle(userId: string, avatarMxc: string | undefined): ProfileStyleData {
-  const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
-  const [style, setStyle] = useState<ProfileStyleData>({});
-
-  useEffect(() => {
-    if (!avatarMxc) {
-      console.log('[useOtherUserProfileStyle] No avatarMxc provided for', userId);
-      setStyle({});
-      return;
-    }
-
-    const loadStyle = async () => {
-      console.log('[useOtherUserProfileStyle] Loading style for', userId, 'avatarMxc:', avatarMxc);
-      
-      // Check cache first
-      const cacheKey = `${userId}:${avatarMxc}`;
-      const cached = userStyleCache.get(cacheKey);
-
-      if (cached && Date.now() - cached.timestamp < CACHE_TTL_MS) {
-        console.log('[useOtherUserProfileStyle] Using cached style:', cached.style);
-        setStyle(cached.style);
-        return;
-      }
-
-      const httpUrl = mxcUrlToHttp(mx, avatarMxc, useAuthentication);
-      console.log('[useOtherUserProfileStyle] Fetching metadata from:', httpUrl);
-      
-      if (!httpUrl) {
-        console.log('[useOtherUserProfileStyle] Failed to get HTTP URL');
-        setStyle({});
-        return;
-      }
-
-      // Always use current session's token to avoid stale tokens during account switches
-      const accessToken = getCurrentAccessToken();
-      const metadata = await fetchAndExtractMetadata(httpUrl, useAuthentication ? accessToken : null);
-
-      console.log('[useOtherUserProfileStyle] Extracted metadata:', metadata);
-
-      const styleData: ProfileStyleData = {
-        avatarBorderColor: metadata.avatarBorderColor,
-        gradient: metadata.gradient,
-      };
-
-      console.log('[useOtherUserProfileStyle] Final styleData:', styleData);
-
-      // Cache the result
-      userStyleCache.set(cacheKey, { style: styleData, timestamp: Date.now() });
-      setStyle(styleData);
-    };
-
-    loadStyle();
-  }, [mx, useAuthentication, avatarMxc, userId]);
-
-  return style;
-}

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -58,6 +58,7 @@ import {
   listenForAndroidShares,
   materializeSharedFile,
 } from '../../utils/androidShare';
+import { UpdatesDialogHost } from '../../components/updates-dialog';
 
 /**
  * Applies the selected emoji style font to the document.
@@ -698,6 +699,7 @@ export function ClientNonUIFeatures({ children }: ClientNonUIFeaturesProps) {
       <MessageNotifications />
       <BackgroundSyncSetup />
       <PaarrotAPIInitializer />
+      <UpdatesDialogHost />
       <TaskbarFlashStopper />
       <AndroidShareIntentHandler />
       {children}

src/app/pages/client/inbox/Notifications.tsx

@@ -237,7 +237,7 @@ function NotificationItem({
     relation?.rel_type === RelationType.Thread ? relation.event_id : undefined;
 
   // Get custom user color from avatar metadata
-  const customUserColor = useOtherUserColor(event.sender, senderAvatarMxc);
+  const customUserColor = useOtherUserColor(event.sender, room);
 
   const memberPowerTag = getMemberPowerTag(event.sender);
   const tagColor = memberPowerTag?.color

src/app/state/releaseNotes.ts

@@ -0,0 +1,55 @@
+import { atom } from 'jotai';
+
+const LAST_SEEN_VERSION_KEY = 'paarrot:lastSeenVersion';
+const PENDING_RELEASE_NOTES_KEY = 'paarrot:pendingReleaseNotes';
+
+export type PendingReleaseNotes = {
+  version: string;
+  releaseNotes: unknown;
+};
+
+export type ReleaseNotesDialogState = {
+  open: boolean;
+  /** Opened from About instead of an automatic post-update prompt. */
+  manual: boolean;
+};
+
+export const releaseNotesDialogAtom = atom<ReleaseNotesDialogState>({
+  open: false,
+  manual: false,
+});
+
+export function getLastSeenAppVersion(): string | null {
+  return localStorage.getItem(LAST_SEEN_VERSION_KEY);
+}
+
+export function setLastSeenAppVersion(version: string): void {
+  localStorage.setItem(LAST_SEEN_VERSION_KEY, version);
+}
+
+export function storePendingReleaseNotes(version: string, releaseNotes: unknown): void {
+  try {
+    localStorage.setItem(
+      PENDING_RELEASE_NOTES_KEY,
+      JSON.stringify({ version, releaseNotes } satisfies PendingReleaseNotes)
+    );
+  } catch {
+    // ignore quota errors
+  }
+}
+
+export function getPendingReleaseNotes(): PendingReleaseNotes | null {
+  try {
+    const raw = localStorage.getItem(PENDING_RELEASE_NOTES_KEY);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as PendingReleaseNotes;
+    if (typeof parsed?.version !== 'string') return null;
+    return parsed;
+  } catch {
+    return null;
+  }
+}
+
+export function clearPendingReleaseNotes(): void {
+  localStorage.removeItem(PENDING_RELEASE_NOTES_KEY);
+}

src/app/utils/appVersion.ts

@@ -0,0 +1,10 @@
+import { getVersion } from '@tauri-apps/api/app';
+
+/** Returns the running app version (Electron shim or Tauri). */
+export async function getAppVersion(): Promise<string> {
+  try {
+    return await getVersion();
+  } catch {
+    return 'unknown';
+  }
+}

src/app/utils/profileFields.ts

@@ -0,0 +1,192 @@
+import { MatrixClient, Room } from 'matrix-js-sdk';
+import { ThemeKind } from '../hooks/useTheme';
+
+/** MSC4522 stable profile field for username colors */
+export const PROFILE_KEY_COLOR_PREFERENCE_STABLE = 'm.color_preference';
+
+/** MSC4522 unstable profile field for username colors */
+export const PROFILE_KEY_COLOR_PREFERENCE_UNSTABLE = 'eu.she-a.color';
+
+/** MSC4427 unstable profile field for banner */
+export const PROFILE_KEY_BANNER_URL_UNSTABLE = 'chat.commet.profile_banner';
+
+/** MSC4427 stable profile field for banner */
+export const PROFILE_KEY_BANNER_URL_STABLE = 'm.banner_url';
+
+export type ColorPreference = {
+  on_dark?: string;
+  on_light?: string;
+};
+
+const HEX_COLOR_RE = /^#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/;
+
+export function isValidHexColor(color: string): boolean {
+  return HEX_COLOR_RE.test(color);
+}
+
+export function parseColorPreference(value: unknown): ColorPreference | undefined {
+  if (!value || typeof value !== 'object') return undefined;
+
+  const obj = value as Record<string, unknown>;
+  const on_dark = typeof obj.on_dark === 'string' && isValidHexColor(obj.on_dark) ? obj.on_dark : undefined;
+  const on_light = typeof obj.on_light === 'string' && isValidHexColor(obj.on_light) ? obj.on_light : undefined;
+
+  if (!on_dark && !on_light) return undefined;
+  return { on_dark, on_light };
+}
+
+export function extractColorPreferenceFromProfile(profile: Record<string, unknown>): ColorPreference | undefined {
+  const stable = parseColorPreference(profile[PROFILE_KEY_COLOR_PREFERENCE_STABLE]);
+  if (stable) return stable;
+  return parseColorPreference(profile[PROFILE_KEY_COLOR_PREFERENCE_UNSTABLE]);
+}
+
+export function resolveColorForTheme(
+  preference: ColorPreference | undefined,
+  themeKind: ThemeKind
+): string | undefined {
+  if (!preference) return undefined;
+  if (themeKind === ThemeKind.Dark) {
+    return preference.on_dark ?? preference.on_light;
+  }
+  return preference.on_light ?? preference.on_dark;
+}
+
+export function hasColorPreference(preference: ColorPreference | undefined): boolean {
+  return Boolean(preference?.on_dark || preference?.on_light);
+}
+
+export function extractBannerUrlFromProfile(profile: Record<string, unknown>): string | undefined {
+  const stable = profile[PROFILE_KEY_BANNER_URL_STABLE];
+  if (typeof stable === 'string' && stable.startsWith('mxc://')) return stable;
+
+  const unstable = profile[PROFILE_KEY_BANNER_URL_UNSTABLE];
+  if (typeof unstable === 'string' && unstable.startsWith('mxc://')) return unstable;
+
+  return undefined;
+}
+
+export async function getBannerUrlProfileKey(mx: MatrixClient): Promise<string> {
+  if (await mx.isVersionSupported('v1.16')) {
+    return PROFILE_KEY_BANNER_URL_STABLE;
+  }
+  return PROFILE_KEY_BANNER_URL_UNSTABLE;
+}
+
+export async function loadBannerUrl(mx: MatrixClient, userId: string): Promise<string | undefined> {
+  if (await mx.doesServerSupportExtendedProfiles()) {
+    try {
+      const profile = await mx.getExtendedProfile(userId);
+      return extractBannerUrlFromProfile(profile);
+    } catch {
+      // fall through
+    }
+  }
+
+  try {
+    const profile = (await mx.getProfileInfo(userId)) as Record<string, unknown>;
+    return extractBannerUrlFromProfile(profile);
+  } catch {
+    return undefined;
+  }
+}
+
+export async function saveBannerUrl(mx: MatrixClient, bannerMxc: string): Promise<void> {
+  if (!(await mx.doesServerSupportExtendedProfiles())) {
+    throw new Error('Server does not support extended profile fields (MSC4133)');
+  }
+
+  const key = await getBannerUrlProfileKey(mx);
+  await mx.setExtendedProfileProperty(key, bannerMxc);
+  const userId = mx.getUserId();
+  if (userId) clearBannerCache(userId);
+}
+
+export async function deleteBannerUrl(mx: MatrixClient): Promise<void> {
+  if (!(await mx.doesServerSupportExtendedProfiles())) {
+    throw new Error('Server does not support extended profile fields (MSC4133)');
+  }
+
+  const key = await getBannerUrlProfileKey(mx);
+  await mx.deleteExtendedProfileProperty(key);
+  const userId = mx.getUserId();
+  if (userId) clearBannerCache(userId);
+}
+
+let bannerCacheClearImpl: (userId: string) => void = () => {};
+
+export function registerBannerCacheClear(fn: (userId: string) => void): void {
+  bannerCacheClearImpl = fn;
+}
+
+function clearBannerCache(userId: string): void {
+  bannerCacheClearImpl(userId);
+}
+
+export async function getColorPreferenceProfileKey(mx: MatrixClient): Promise<string> {
+  if (await mx.isVersionSupported('v1.16')) {
+    return PROFILE_KEY_COLOR_PREFERENCE_STABLE;
+  }
+  return PROFILE_KEY_COLOR_PREFERENCE_UNSTABLE;
+}
+
+export async function loadColorPreference(
+  mx: MatrixClient,
+  userId: string
+): Promise<ColorPreference | undefined> {
+  if (await mx.doesServerSupportExtendedProfiles()) {
+    try {
+      const profile = await mx.getExtendedProfile(userId);
+      return extractColorPreferenceFromProfile(profile);
+    } catch {
+      // fall through to standard profile endpoint
+    }
+  }
+
+  try {
+    const profile = (await mx.getProfileInfo(userId)) as Record<string, unknown>;
+    return extractColorPreferenceFromProfile(profile);
+  } catch {
+    return undefined;
+  }
+}
+
+export function extractMemberColorPreference(room: Room | undefined, userId: string): ColorPreference | undefined {
+  if (!room) return undefined;
+  const member = room.getMember(userId);
+  const content = member?.events.member?.getContent();
+  if (!content) return undefined;
+  return extractColorPreferenceFromProfile(content as Record<string, unknown>);
+}
+
+export async function saveColorPreference(mx: MatrixClient, preference: ColorPreference): Promise<void> {
+  if (!(await mx.doesServerSupportExtendedProfiles())) {
+    throw new Error('Server does not support extended profile fields (MSC4133)');
+  }
+
+  const key = await getColorPreferenceProfileKey(mx);
+  await mx.setExtendedProfileProperty(key, preference);
+  const userId = mx.getUserId();
+  if (userId) clearPreferenceCache(userId);
+}
+
+let preferenceCacheClearImpl: (userId: string) => void = () => {};
+
+export function registerPreferenceCacheClear(fn: (userId: string) => void): void {
+  preferenceCacheClearImpl = fn;
+}
+
+function clearPreferenceCache(userId: string): void {
+  preferenceCacheClearImpl(userId);
+}
+
+export async function deleteColorPreference(mx: MatrixClient): Promise<void> {
+  if (!(await mx.doesServerSupportExtendedProfiles())) {
+    throw new Error('Server does not support extended profile fields (MSC4133)');
+  }
+
+  const key = await getColorPreferenceProfileKey(mx);
+  await mx.deleteExtendedProfileProperty(key);
+  const userId = mx.getUserId();
+  if (userId) clearPreferenceCache(userId);
+}

src/app/utils/registerDesktopMediaSaver.ts

@@ -0,0 +1,111 @@
+import { registerMediaSaver } from './saveMedia';
+import { isElectron, isTauri } from './tauri';
+
+type ElectronSaveResult = {
+  success?: boolean;
+  canceled?: boolean;
+  path?: string;
+  error?: string;
+};
+
+type ElectronMediaApi = {
+  saveFile?: (payload: {
+    filename: string;
+    mimeType?: string;
+    data: Uint8Array;
+  }) => Promise<ElectronSaveResult>;
+};
+
+async function blobToUint8Array(blob: Blob): Promise<Uint8Array> {
+  const buffer = await blob.arrayBuffer();
+  return new Uint8Array(buffer);
+}
+
+function guessFilters(filename: string, mimeType?: string): Array<{ name: string; extensions: string[] }> {
+  const ext = filename.includes('.') ? filename.split('.').pop()!.toLowerCase() : '';
+  const mime = (mimeType || '').toLowerCase();
+
+  if (mime.startsWith('image/') || ['png', 'jpg', 'jpeg', 'gif', 'webp', 'bmp', 'svg'].includes(ext)) {
+    return [
+      { name: 'Images', extensions: ['png', 'jpg', 'jpeg', 'gif', 'webp', 'bmp', 'svg'] },
+      { name: 'All Files', extensions: ['*'] },
+    ];
+  }
+  if (mime.startsWith('video/') || ['mp4', 'webm', 'mkv', 'mov'].includes(ext)) {
+    return [
+      { name: 'Videos', extensions: ['mp4', 'webm', 'mkv', 'mov'] },
+      { name: 'All Files', extensions: ['*'] },
+    ];
+  }
+  if (mime.startsWith('audio/') || ['mp3', 'ogg', 'wav', 'm4a', 'flac'].includes(ext)) {
+    return [
+      { name: 'Audio', extensions: ['mp3', 'ogg', 'wav', 'm4a', 'flac'] },
+      { name: 'All Files', extensions: ['*'] },
+    ];
+  }
+  if (mime === 'application/pdf' || ext === 'pdf') {
+    return [
+      { name: 'PDF', extensions: ['pdf'] },
+      { name: 'All Files', extensions: ['*'] },
+    ];
+  }
+  if (ext) {
+    return [
+      { name: ext.toUpperCase(), extensions: [ext] },
+      { name: 'All Files', extensions: ['*'] },
+    ];
+  }
+  return [{ name: 'All Files', extensions: ['*'] }];
+}
+
+async function saveWithElectron(blob: Blob, filename: string): Promise<void> {
+  const media = (window.electron as { media?: ElectronMediaApi } | undefined)?.media;
+  if (!media?.saveFile) {
+    throw new Error('Electron media.saveFile is unavailable');
+  }
+
+  const data = await blobToUint8Array(blob);
+  const result = await media.saveFile({
+    filename,
+    mimeType: blob.type || 'application/octet-stream',
+    data,
+  });
+
+  if (result?.canceled) return;
+  if (result?.success === false) {
+    throw new Error(result.error || 'Failed to save file');
+  }
+}
+
+async function saveWithTauri(blob: Blob, filename: string): Promise<void> {
+  const { save } = await import('@tauri-apps/plugin-dialog');
+  const { writeFile } = await import('@tauri-apps/plugin-fs');
+
+  const path = await save({
+    defaultPath: filename,
+    filters: guessFilters(filename, blob.type),
+  });
+  if (!path) return;
+
+  const data = await blobToUint8Array(blob);
+  await writeFile(path, data);
+}
+
+/**
+ * Wire Electron / Tauri native save dialogs into core saveMedia helpers.
+ * Call once at desktop app startup. No-ops in plain browser.
+ */
+export function registerDesktopMediaSaver(): void {
+  if (isElectron()) {
+    registerMediaSaver(async (blob, filename) => {
+      await saveWithElectron(blob, filename);
+    });
+    return;
+  }
+
+  if (isTauri()) {
+    registerMediaSaver(async (blob, filename) => {
+      await saveWithTauri(blob, filename);
+    });
+  }
+}

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/saveMedia.ts

@@ -0,0 +1,55 @@
+import FileSaver from 'file-saver';
+import { downloadMedia } from './matrix';
+import { getCurrentAccessToken } from './auth';
+
+export type MediaSaver = (blob: Blob, filename: string) => void | Promise<void>;
+
+let customMediaSaver: MediaSaver | null = null;
+
+const defaultMediaSaver: MediaSaver = (blob, filename) => {
+  FileSaver.saveAs(blob, filename);
+};
+
+/**
+ * Register a platform-specific media saver (Android MediaStore, Electron dialog, etc.).
+ * Pass null to restore the default FileSaver path.
+ *
+ * Platforms should call this once at startup (mobile overlay / desktop shell entry).
+ */
+export const registerMediaSaver = (saver: MediaSaver | null): void => {
+  customMediaSaver = saver;
+};
+
+/**
+ * Persist a Blob to disk via the registered platform saver, or FileSaver by default.
+ */
+export const saveMediaBlob = async (blob: Blob, filename: string): Promise<void> => {
+  const saver = customMediaSaver ?? defaultMediaSaver;
+  await saver(blob, filename);
+};
+
+/**
+ * Fetch media (auth download or blob:/data:/http URL) and save it via [saveMediaBlob].
+ */
+export const downloadAndSaveMedia = async (
+  src: string,
+  filename: string,
+  accessToken?: string | null
+): Promise<void> => {
+  let blob: Blob;
+  try {
+    if (src.startsWith('blob:') || src.startsWith('data:')) {
+      const res = await fetch(src);
+      if (!res.ok) throw new Error(`Failed to fetch ${src}`);
+      blob = await res.blob();
+    } else {
+      blob = await downloadMedia(src, accessToken ?? getCurrentAccessToken());
+    }
+  } catch (error) {
+    console.warn('[saveMedia] downloadMedia failed, trying fetch fallback:', error);
+    const res = await fetch(src);
+    if (!res.ok) throw error;
+    blob = await res.blob();
+  }
+  await saveMediaBlob(blob, filename);
+};

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/ext.d.ts

@@ -56,6 +56,18 @@ interface ElectronAPI {
   clipboard?: {
     writeText: (text: string) => void;
   };
+  media?: {
+    saveFile: (payload: {
+      filename: string;
+      mimeType?: string;
+      data: Uint8Array;
+    }) => Promise<{
+      success?: boolean;
+      canceled?: boolean;
+      path?: string;
+      error?: string;
+    }>;
+  };
   plugins?: PluginAPI;
   protocol?: {
     getStatus: () => Promise<{
@@ -95,6 +107,12 @@ interface ElectronAPI {
       error?: string;
     }>;
   };
+  updater?: {
+    onUpdateDownloaded: (callback: (info: {
+      version: string;
+      releaseNotes?: unknown;
+    }) => void) => void;
+  };
 }
 
 declare global {

src/index.tsx

@@ -17,6 +17,7 @@ import { trimTrailingSlash } from './app/utils/common';
 import App from './app/pages/App';
 import { applySafeAreaInsets, isTauri } from './app/utils/tauri';
 import { enableViewTransitionsForNavigation } from './app/utils/viewTransitions';
+import { registerDesktopMediaSaver } from './app/utils/registerDesktopMediaSaver';
 
 // import i18n (needs to be bundled ;))
 import './app/i18n';
@@ -29,6 +30,9 @@ applySafeAreaInsets();
 // Enable View Transitions API for smooth navigation
 enableViewTransitionsForNavigation();
 
+// Desktop shells: native Save dialog instead of browser FileSaver downloads.
+registerDesktopMediaSaver();
+
 // Register Service Worker
 if ('serviceWorker' in navigator) {
   const swUrl =

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',
 }
@@ -61,8 +64,114 @@ export enum MessageEvent {
 
   /** 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

@@ -53,6 +53,11 @@ const copyFiles = {
       src: 'public/font',
       dest: 'public/',
     },
+    {
+      src: 'public/update/**/*',
+      dest: 'update',
+      rename: (_name, _ext, fullPath) => fullPath.replace(/^public[/\\]update[/\\]/, ''),
+    },
   ],
 };
 
@@ -124,6 +129,37 @@ function servePublicAssets() {
             res.setHeader('Content-Type', contentType);
             res.setHeader('Cache-Control', 'no-cache');
 
+            const fileStream = fs.createReadStream(resolvedPath);
+            fileStream.pipe(res);
+          } else {
+            res.writeHead(404);
+            res.end('File not found');
+          }
+        } else if (req.url?.startsWith('/update/')) {
+          const fileName = req.url.replace('/update/', '');
+          const resolvedPath = path.join(path.resolve(), 'public', 'update', fileName);
+
+          if (fs.existsSync(resolvedPath) && !resolvedPath.includes('..')) {
+            const ext = path.extname(fileName).toLowerCase();
+            const contentType =
+              ext === '.md'
+                ? 'text/markdown; charset=utf-8'
+                : ext === '.json'
+                  ? 'application/json'
+                  : ext === '.svg'
+                    ? 'image/svg+xml'
+                    : ext === '.png'
+                      ? 'image/png'
+                      : ext === '.jpg' || ext === '.jpeg'
+                        ? 'image/jpeg'
+                        : ext === '.webp'
+                          ? 'image/webp'
+                          : ext === '.gif'
+                            ? 'image/gif'
+                            : 'application/octet-stream';
+            res.setHeader('Content-Type', contentType);
+            res.setHeader('Cache-Control', 'no-cache');
+
             const fileStream = fs.createReadStream(resolvedPath);
             fileStream.pipe(res);
           } else {