fix: avatar-decoration live-update + CDN override + profile 404; DND badge color

Avatar decorations (useAvatarDecoration.ts / ProfileDecoration.tsx):
- invalidateDecorationCache now notifies a per-user listener set (and clears the
  give-up counter), so changing your own decoration updates mounted avatars
  (timeline, member list) live instead of only after a remount. Concurrent
  re-fetches de-dupe via the existing `pending` map.
- Picker grid thumbnails use decorationUrl() instead of the raw DECORATION_CDN
  literal, so a VITE_DECORATION_CDN override no longer breaks the grid while
  real avatars work.
- Settings reads the full /profile/{userId} instead of the /{field}
  sub-resource, which 404s (console error) for anyone without a decoration set
  — matching the pattern already used by useAvatarDecoration.

Presence (Presence.tsx): PresenceBadge renders DND (unavailable + status 'dnd')
as red "Do Not Disturb" to match PresenceRingAvatar and the settings picker;
it was the lone outlier showing a yellow "Idle".

Bug-hunt findings from LOTUS_TODO. Two review agents (correctness +
upstream-behavior); gate-green (tsc, eslint, prettier, 914 tests, build). Both
flagged only pre-existing edge notes (in-flight piggyback staleness, 'dnd'
free-text collision shared with the ring avatar) — neither introduced here.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/presence/Presence.tsx

@@ -27,7 +27,14 @@ type PresenceBadgeProps = {
 };
 export function PresenceBadge({ presence, status, size }: PresenceBadgeProps) {
   const label = usePresenceLabel();
-  const ariaLabel = status ? `${label[presence]} — ${status}` : label[presence];
+  // DND is encoded as unavailable + status_msg 'dnd'; render it red/"Do Not
+  // Disturb" to match PresenceRingAvatar and the settings picker (which both
+  // special-case 'dnd' → Critical) — the badge was the lone outlier showing a
+  // yellow "Idle". The 'dnd' sentinel isn't surfaced as a status line.
+  const isDnd = presence === Presence.Unavailable && status === 'dnd';
+  const displayLabel = isDnd ? 'Do Not Disturb' : label[presence];
+  const displayStatus = isDnd ? undefined : status;
+  const ariaLabel = displayStatus ? `${displayLabel} — ${displayStatus}` : displayLabel;
 
   return (
     <TooltipProvider
@@ -38,9 +45,9 @@ export function PresenceBadge({ presence, status, size }: PresenceBadgeProps) {
       tooltip={
         <Tooltip>
           <Box style={{ maxWidth: toRem(250) }} alignItems="Baseline" gap="100">
-            <Text size="L400">{label[presence]}</Text>
-            {status && <Text size="T200">•</Text>}
-            {status && <Text size="T200">{status}</Text>}
+            <Text size="L400">{displayLabel}</Text>
+            {displayStatus && <Text size="T200">•</Text>}
+            {displayStatus && <Text size="T200">{displayStatus}</Text>}
           </Box>
         </Tooltip>
       }
@@ -50,7 +57,7 @@ export function PresenceBadge({ presence, status, size }: PresenceBadgeProps) {
           aria-label={ariaLabel}
           ref={triggerRef}
           size={size}
-          variant={PresenceToColor[presence]}
+          variant={isDnd ? 'Critical' : PresenceToColor[presence]}
           fill={presence === Presence.Offline ? 'Soft' : 'Solid'}
           radii="Pill"
         />

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

@@ -4,11 +4,7 @@ import { Method } from 'matrix-js-sdk';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
 import { SettingTile } from '../../../components/setting-tile';
-import {
-  DECORATION_CATEGORIES,
-  DECORATION_CDN,
-  decorationUrl,
-} from '../../lotus/avatarDecorations';
+import { DECORATION_CATEGORIES, decorationUrl } from '../../lotus/avatarDecorations';
 import { invalidateDecorationCache } from '../../../hooks/useAvatarDecoration';
 
 const PROFILE_FIELD = 'io.lotus.avatar_decoration';
@@ -48,7 +44,7 @@ function DecorationPreviewCell({
       }}
     >
       <img
-        src={`${DECORATION_CDN}/${slug}.png`}
+        src={decorationUrl(slug)}
         alt={name}
         loading="lazy"
         decoding="async"
@@ -73,11 +69,11 @@ export function ProfileDecoration() {
   const [selected, setSelected] = useState<string | null>(null);
 
   useEffect(() => {
+    // Fetch the whole profile, not the `/{field}` sub-resource: an unset field
+    // 404s (a console error for anyone without a decoration). The full profile
+    // returns 200 with all fields incl. custom MSC4133 ones — read it out.
     mx.http
-      .authedRequest<Record<string, string>>(
-        Method.Get,
-        `/profile/${encodeURIComponent(userId)}/${PROFILE_FIELD}`,
-      )
+      .authedRequest<Record<string, string>>(Method.Get, `/profile/${encodeURIComponent(userId)}`)
       .then((res) => {
         const val = (res[PROFILE_FIELD] as string | undefined) ?? null;
         setCurrent(val);

src/app/hooks/useAvatarDecoration.ts

@@ -12,6 +12,22 @@ const pending = new Map<string, Array<(val: string | null) => void>>();
 // Transient-failure attempt counts (userId → n) so a flaky federated lookup
 // can retry a couple of times, then gives up for the session.
 const failures = new Map<string, number>();
+// Mounted hooks per userId, so an invalidation (e.g. you change your own
+// decoration) re-fetches live instead of waiting for a remount.
+const listeners = new Map<string, Set<() => void>>();
+
+function subscribeDecoration(userId: string, cb: () => void): () => void {
+  let set = listeners.get(userId);
+  if (!set) {
+    set = new Set();
+    listeners.set(userId, set);
+  }
+  set.add(cb);
+  return () => {
+    set.delete(cb);
+    if (set.size === 0) listeners.delete(userId);
+  };
+}
 
 function fetchDecoration(
   authedRequest: (method: Method, path: string) => Promise<Record<string, string>>,
@@ -66,6 +82,10 @@ function fetchDecoration(
 
 export function invalidateDecorationCache(userId: string): void {
   cache.delete(userId);
+  // Also clear the give-up counter so the next fetch starts fresh.
+  failures.delete(userId);
+  // Notify mounted avatars for this user so they re-fetch immediately.
+  listeners.get(userId)?.forEach((cb) => cb());
 }
 
 export function useAvatarDecoration(userId: string): string | null {
@@ -74,14 +94,22 @@ export function useAvatarDecoration(userId: string): string | null {
 
   useEffect(() => {
     let cancelled = false;
-    fetchDecoration(
-      (method, path) => mx.http.authedRequest<Record<string, string>>(method, path),
-      userId,
-    ).then((val) => {
-      if (!cancelled) setSlug(val);
-    });
+    const load = () => {
+      fetchDecoration(
+        (method, path) => mx.http.authedRequest<Record<string, string>>(method, path),
+        userId,
+      ).then((val) => {
+        if (!cancelled) setSlug(val);
+      });
+    };
+    load();
+    // Re-run on invalidation (fetchDecoration re-fetches since the cache entry
+    // was cleared; concurrent mounts for the same user still de-dupe via
+    // `pending`). Keeps live avatars in sync when the decoration changes.
+    const unsubscribe = subscribeDecoration(userId, load);
     return () => {
       cancelled = true;
+      unsubscribe();
     };
   }, [mx, userId]);