Add Shared Media drawer and harden same-room navigation.

Widen the media panel, support skinny full-page mode, keep jump-to-latest and return-to-previous reliable, and stop same-room event jumps from remounting the outlet or yanking the sidebar.

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

@@ -53,6 +53,17 @@ export const Reaction = style([
   },
 ]);
 
+export const ReactionText = style([
+  DefaultReset,
+  {
+    minWidth: 0,
+    maxWidth: toRem(150),
+    display: 'inline-flex',
+    alignItems: 'center',
+    lineHeight: toRem(20),
+  },
+]);
+
 export const ReactionStack = style([
   DefaultReset,
   {
@@ -66,7 +77,7 @@ export const ReactionStack = style([
   },
 ]);
 
-export const ReactionText = style([
+export const ReactionSticker = style([
   DefaultReset,
   {
     minWidth: 0,
@@ -77,11 +88,6 @@ export const ReactionText = style([
     lineHeight: toRem(20),
     gridArea: '1 / 1',
     transformOrigin: 'center center',
-    // Fan each stacked copy so count>1 reads as multiple stickers
-    transform: `translate(
-      calc(var(--sticker-i, 0) * 7px - 2px),
-      calc(var(--sticker-i, 0) * -5px)
-    ) rotate(calc((var(--sticker-i, 0) - 1) * 12deg))`,
   },
 ]);
 

src/app/components/message/Reaction.tsx

@@ -6,6 +6,7 @@ import * as css from './Reaction.css';
 import { getHexcodeForEmoji, getShortcodeFor } from '../../plugins/emoji';
 import { getMemberDisplayName } from '../../utils/room';
 import { eventWithShortcode, getMxIdLocalPart, mxcUrlToHttp } from '../../utils/matrix';
+import { isStationeryTheme, useTheme } from '../../hooks/useTheme';
 
 const MAX_STICKER_STACK = 4;
 
@@ -18,13 +19,48 @@ export const Reaction = as<
     useAuthentication?: boolean;
   }
 >(({ className, mx, count, reaction, useAuthentication, ...props }, ref) => {
-  const stackCount = Math.min(Math.max(count, 1), MAX_STICKER_STACK);
-  const showCount = count > 2;
+  const theme = useTheme();
+  const stationery = isStationeryTheme(theme);
   const isCustomEmoji = reaction.startsWith('mxc://');
   const customSrc = isCustomEmoji
     ? mxcUrlToHttp(mx, reaction, useAuthentication) ?? reaction
     : undefined;
 
+  const emoji = isCustomEmoji ? (
+    <img className={css.ReactionImg} src={customSrc} alt={reaction} />
+  ) : (
+    <Text as="span" size="Inherit" truncate>
+      {reaction}
+    </Text>
+  );
+
+  // Stationery: fanned sticker stack. Everywhere else: compact emoji + count.
+  if (!stationery) {
+    return (
+      <Box
+        as="button"
+        className={classNames(css.Reaction, className)}
+        alignItems="Center"
+        shrink="No"
+        gap="200"
+        data-reaction=""
+        aria-label={`${reaction}, ${count}`}
+        {...props}
+        ref={ref}
+      >
+        <Text className={css.ReactionText} as="span" size="T400">
+          {emoji}
+        </Text>
+        <Text as="span" size="T300" data-reaction-count="">
+          {count}
+        </Text>
+      </Box>
+    );
+  }
+
+  const stackCount = Math.min(Math.max(count, 1), MAX_STICKER_STACK);
+  const showCount = count > 2;
+
   return (
     <Box
       as="button"
@@ -40,12 +76,11 @@ export const Reaction = as<
     >
       <span className={css.ReactionStack} data-reaction-stack-layer="">
         {Array.from({ length: stackCount }, (_, i) => {
-          // Draw back-to-front so the top sticker is the last layer
           const layer = stackCount - 1 - i;
           return (
             <Text
               key={layer}
-              className={css.ReactionText}
+              className={css.ReactionSticker}
               as="span"
               size="T400"
               data-reaction-sticker=""

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

@@ -242,6 +242,7 @@ export const MessageTextBody = recipe({
         lineHeight: 1,
         overflow: 'visible',
         overflowY: 'visible',
+        paddingBottom: config.space.S200,
       },
     },
     emote: {