fix(bots): AI typing indicator — 45s receipt expiry (5s died mid-generation, Synapse doesn't re-emit unchanged m.typing); avatar ring spinner in header replaces dots

src/app/features/bots/AiChatHeader.css.ts

@@ -0,0 +1,39 @@
+import { keyframes, style } from '@vanilla-extract/css';
+import { toRem } from 'folds';
+
+// "Bot is thinking": an accent arc spinning along the OUTER edge of the hero avatar
+// while the bot composes a reply. Lives in its own file (not BotShell.css) because the
+// hero styles are shared verbatim with bridge bots — only the AI chat gets the ring.
+// The wrapper exists because HeroAvatar clips (overflow: hidden), so an overhanging
+// ring must be its sibling, not its child.
+const vojoAiAccent = '#f35294'; // the Vojo AI avatar's own accent (mean of its pink cluster)
+
+const spin = keyframes({
+  to: { transform: 'rotate(360deg)' },
+});
+
+export const AvatarSpinHost = style({
+  position: 'relative',
+  flexShrink: 0, // takes over HeroAvatar's role in the hero flex row
+});
+
+export const AvatarSpinRing = style({
+  position: 'absolute',
+  inset: toRem(-4), // a hair outside the 56px avatar circle — a ring around it, not a border on it
+  borderRadius: '50%',
+  border: `${toRem(2)} solid transparent`,
+  borderTopColor: vojoAiAccent,
+  animationName: spin,
+  animationDuration: '1.6s',
+  animationTimingFunction: 'linear',
+  animationIterationCount: 'infinite',
+  pointerEvents: 'none',
+  '@media': {
+    '(prefers-reduced-motion: reduce)': {
+      // Motion off: a static full ring still says "working".
+      animationName: 'none',
+      borderColor: vojoAiAccent,
+      opacity: 0.6,
+    },
+  },
+});

src/app/features/bots/AiChatHeader.tsx

@@ -11,11 +11,13 @@ import { ScreenSize, useScreenSizeContext } from '../../hooks/useScreenSize';
 import { stopPropagation } from '../../utils/keyboard';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
+import { useRoomTypingMember } from '../../hooks/useRoomTypingMembers';
 import { mxcUrlToHttp } from '../../utils/matrix';
 // Reuse the bridge hero's EXACT styles so the AI header is pixel-identical to every other bot
 // header (avatar 56px, name 22px, handle, description, mobile back chevron). The hero markup
 // below mirrors BotShellHero verbatim — keep them in sync. Only the ⋮ menu differs (AiChatMenu).
 import * as css from './BotShell.css';
+import * as aiCss from './AiChatHeader.css';
 
 // Initial for the avatar block — same rule as BotShellHero.
 const heroInitial = (preset: BotPreset): string => {
@@ -50,6 +52,11 @@ export function AiChatHeader({ preset, room, onNewChat, onOpenHistory }: AiChatH
     ? mxcUrlToHttp(mx, avatarMxc, useAuthentication, 96, 96, 'crop') ?? undefined
     : undefined;
 
+  // "Bot is thinking" — the bot's typing receipt drives the orange ring around the hero
+  // avatar (the AI chat's only generation indicator; the thread body shows nothing).
+  const typingReceipts = useRoomTypingMember(room.roomId);
+  const botTyping = typingReceipts.some((r) => r.userId === preset.mxid);
+
   const handleOpenMenu: React.MouseEventHandler<HTMLButtonElement> = (evt) => {
     setMenuAnchor(evt.currentTarget.getBoundingClientRect());
   };
@@ -79,8 +86,15 @@ export function AiChatHeader({ preset, room, onNewChat, onOpenHistory }: AiChatH
             )}
           </BackRouteHandler>
         )}
-        <div className={css.HeroAvatar} aria-hidden="true">
+        <div
-          {avatarUrl ? <img className={css.HeroAvatarImg} src={avatarUrl} alt="" /> : initial}
+          className={aiCss.AvatarSpinHost}
+          role={botTyping ? 'status' : undefined}
+          aria-label={botTyping ? t('Room.is_typing') : undefined}
+        >
+          <div className={css.HeroAvatar} aria-hidden="true">
+            {avatarUrl ? <img className={css.HeroAvatarImg} src={avatarUrl} alt="" /> : initial}
+          </div>
+          {botTyping && <span className={aiCss.AvatarSpinRing} aria-hidden="true" />}
         </div>
         <div className={css.HeroBody}>
           <div className={css.HeroTitleRow}>

src/app/features/room/ThreadDrawer.css.ts

@@ -1,4 +1,4 @@
-import { keyframes, style } from '@vanilla-extract/css';
+import { style } from '@vanilla-extract/css';
 import { color, config, toRem } from 'folds';
 import {
   VOJO_BUBBLE_BAND_PX,
@@ -342,36 +342,5 @@ export const AssistantUserBubble = style({
   color: color.Surface.OnContainer,
 });
 
-// "Bot is typing" dots, shown after the last turn while the bot composes a reply.
+// (The assistant surface's generation indicator lives in AiChatHeader.css — an orange
-const typingBlink = keyframes({
+// ring around the hero avatar. The thread body deliberately renders nothing.)
-  '0%, 80%, 100%': { opacity: 0.2, transform: 'translateY(0)' },
-  '40%': { opacity: 1, transform: `translateY(-${toRem(2)})` },
-});
-
-export const TypingDots = style({
-  display: 'inline-flex',
-  alignItems: 'center',
-  gap: toRem(4),
-  padding: `${config.space.S200} 0`,
-});
-
-export const TypingDot = style({
-  width: toRem(6),
-  height: toRem(6),
-  borderRadius: '50%',
-  backgroundColor: color.Surface.OnContainer,
-  opacity: 0.2,
-  animationName: typingBlink,
-  animationDuration: '1.2s',
-  animationIterationCount: 'infinite',
-  selectors: {
-    '&:nth-child(2)': { animationDelay: '0.2s' },
-    '&:nth-child(3)': { animationDelay: '0.4s' },
-  },
-  '@media': {
-    '(prefers-reduced-motion: reduce)': {
-      animationName: 'none',
-      opacity: 0.5,
-    },
-  },
-});

src/app/features/room/ThreadDrawer.tsx

@@ -64,7 +64,6 @@ import { useMentionClickHandler } from '../../hooks/useMentionClickHandler';
 import { useSpoilerClickHandler } from '../../hooks/useSpoilerClickHandler';
 import { useChannelsMode } from '../../hooks/useChannelsMode';
 import { useIsOneOnOne } from '../../hooks/useRoom';
-import { useRoomTypingMember } from '../../hooks/useRoomTypingMembers';
 import { useTheme } from '../../hooks/useTheme';
 import { useImagePackRooms } from '../../hooks/useImagePackRooms';
 import { useRoomCreatorsTag } from '../../hooks/useRoomCreatorsTag';
@@ -370,10 +369,8 @@ export function ThreadDrawer({
   const isOneOnOne = useIsOneOnOne();
   const channelsMode = useChannelsMode();
   const isBridged = channelsMode && isBridgedRoom(room);
-  // Assistant-mode typing indicator: in a 1:1 bot DM the only other member is the bot, so any
+  // The assistant surface shows NO in-chat generation indicator: the bot's typing
-  // non-self typing receipt means the bot is composing a reply. Drives the typing-dots row.
+  // receipt drives the orange spinner around the hero avatar in AiChatHeader instead.
-  const typingReceipts = useRoomTypingMember(room.roomId);
-  const botTyping = assistantStyle && typingReceipts.some((r) => r.userId !== mx.getUserId());
   const [showDeveloperTools] = useSetting(settingsAtom, 'developerTools');
 
   const roomToParents = useAtomValue(roomToParentsAtom);
@@ -934,19 +931,6 @@ export function ThreadDrawer({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [repliesCount, myUserId, tryMarkThreadRead]);
 
-  // Assistant typing-dots follow. The "bot is typing" row renders INSIDE the scroll, after the
-  // last reply. When the bot starts composing while we're parked at the bottom, those dots add
-  // height below the fold, the bottom sentinel scrolls out, and the IntersectionObserver flips
-  // isAtBottomRef false — which would then make the growth effect suppress the bot's (non-own)
-  // reply. So snap to the new bottom when the dots appear (pre-paint, so the sentinel never
-  // leaves view). Only when already at-bottom — a user reading older replies is never yanked down.
-  useLayoutEffect(() => {
-    if (!botTyping) return;
-    const host = scrollHostRef.current;
-    if (!host || !isAtBottomRef.current) return;
-    host.scrollTop = host.scrollHeight;
-  }, [botTyping]);
-
   // Stay at-bottom when the drawer scroll container resizes — Android
   // soft-keyboard open/close shrinks the viewport, and Capacitor's
   // default `windowSoftInputMode=adjustResize` shrinks the WebView
@@ -1378,15 +1362,6 @@ export function ThreadDrawer({
             {renderThreadEvent(reply)}
           </MessageErrorBoundary>
         ))}
-        {botTyping && (
-          <div className={css.AssistantBotRow}>
-            <div className={css.TypingDots} aria-label={t('Room.is_typing')}>
-              <span className={css.TypingDot} />
-              <span className={css.TypingDot} />
-              <span className={css.TypingDot} />
-            </div>
-          </div>
-        )}
         <div ref={setBottomSentinel} />
       </div>
     );

src/app/state/typingMembers.ts

@@ -7,6 +7,17 @@ import { settingsAtom } from './settings';
 
 export const TYPING_TIMEOUT_MS = 5000; // 5 seconds
 
+// Receiver-side safety-net expiry for a typing receipt we DISPLAY. Deliberately much
+// longer than TYPING_TIMEOUT_MS (the sender-side throttle/expiry above): Synapse does
+// NOT re-emit m.typing while the room's typing list is unchanged, and the AI bot
+// legitimately "types" for its whole generation, refreshing server-side every 20s
+// against a 30s server expiry — so with a 5s local expiry the indicator died 5s in
+// and never came back (no fresh PUT ever arrives). A human's stop-typing still clears
+// instantly (the server emits the removal → DELETE via sync); this only guards
+// against a receipt stuck by a missed event, so it just needs to outlive the server's
+// own 30s expiry window, not be snappy.
+export const TYPING_RECEIPT_EXPIRE_MS = 45_000;
+
 export type TypingReceipt = {
   userId: string;
   ts: number;
@@ -95,7 +106,7 @@ export const roomIdToTypingMembersAtom = atom<
           get(baseRoomIdToTypingMembersAtom),
           roomId,
           userId,
-          TYPING_TIMEOUT_MS
+          TYPING_RECEIPT_EXPIRE_MS
         );
         if (timeout) {
           set(
@@ -109,7 +120,7 @@ export const roomIdToTypingMembersAtom = atom<
             )
           );
         }
-      }, TYPING_TIMEOUT_MS);
+      }, TYPING_RECEIPT_EXPIRE_MS);
     }
 
     if (