fix(calls): a finished call no longer rings again after a reload (#312)

After a reload/restart within a ring's lifetime, the catch-up sync replays
the ring together with the caller's hang-up and our own decline, and the
MatrixRTC session can keep the stale join. The client rang again for up to
90 s and showed "1 Live" (call screen instead of chat) for minutes.

- Before ringing, check the room STATE (utils/callRing.ts, unit-tested):
  no ring if we already declined that ring or are in the call; if the
  caller has no active membership yet, re-check after 4 s (a real call's
  membership can land just after its ring) and ring only if they joined.
- The "caller gone" dismissal also consults room state, not only the
  possibly stale session.
- When sync becomes live (startup or reconnect), recompute every active
  RTC session from the current state, clearing a stale "Live".

Verified headless (Bob's membership + ring in an invite-only room):
live ring rings; hang-up stops it; reload within the window: before
rang again + "1 Live", now no ring and no "Live"; a ring that arrives
just before the membership still rings.

Fixes #312

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/components/CallEmbedProvider.tsx

@@ -18,8 +18,10 @@ import {
   toRem,
 } from 'folds';
 import {
+  ClientEvent,
   EventTimelineSetHandlerMap,
   EventType,
+  SyncState,
   RelationType,
   Room,
   RoomEvent,
@@ -72,7 +74,7 @@ import { useSetting } from '../state/hooks/settings';
 import { useCallPreferences } from '../state/hooks/callPreferences';
 import { settingsAtom } from '../state/settings';
 import { getStateEvent, getMemberName } from '../utils/room';
-import { isRingableRoom } from '../utils/callRing';
+import { declinedRing, hasActiveCallMembership, isRingableRoom } from '../utils/callRing';
 import { StateEvent } from '../../types/matrix/room';
 import { getPowersLevelFromMatrixEvent } from '../hooks/usePowerLevels';
 import { getRoomCreatorsForRoomId } from '../hooks/useRoomCreators';
@@ -596,11 +598,50 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
         refEventId,
       };
 
-      setCallInfo(info);
+      // [Gitea #312] Don't ring for a call that is already over or handled: after
+      // a reload the first sync replays the ring together with the caller's
+      // hang-up and our own decline. Check the room STATE (not the possibly
+      // stale RTC session). The caller's membership can arrive just after the
+      // ring, so an absent one gets a short grace period before giving up.
+      const myUserId = mx.getSafeUserId();
+      if (declinedRing(room, refEventId, myUserId) || hasActiveCallMembership(room, myUserId)) {
+        return;
+      }
+      if (hasActiveCallMembership(room, sender)) {
+        setCallInfo(info);
+        return;
+      }
+      setTimeout(() => {
+        if (Date.now() >= senderTs + lifetime) return;
+        if (declinedRing(room, refEventId, myUserId) || hasActiveCallMembership(room, myUserId)) {
+          return;
+        }
+        if (hasActiveCallMembership(room, sender)) setCallInfo(info);
+      }, 4000);
     },
     [mx, directs, callEmbed, setToast],
   );
 
+  // [Gitea #312] A catch-up sync (after a reload or reconnect) can replay a
+  // call's join and leave in one batch, and the RTC session may keep the join
+  // (stale "1 Live", call screen instead of chat). Once sync is live again,
+  // recompute every active session from the room's current state.
+  useEffect(() => {
+    const onSync = (state: SyncState, prev: SyncState | null) => {
+      if (state !== SyncState.Syncing || prev === SyncState.Syncing) return;
+      mx.getRooms().forEach((r) => {
+        mx.matrixRTC
+          .getActiveRoomSession(r)
+          ?._onRTCSessionMemberUpdate()
+          .catch(() => undefined);
+      });
+    };
+    mx.on(ClientEvent.Sync, onSync);
+    return () => {
+      mx.removeListener(ClientEvent.Sync, onSync);
+    };
+  }, [mx]);
+
   useEffect(() => {
     mx.on(RoomEvent.Timeline, handleTimelineEvent);
     return () => {
@@ -629,7 +670,10 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
       const { memberships } = session;
       if (memberships.some((m) => m.sender === myUserId))
         dismiss(); // answered elsewhere
-      else if (memberships.length === 0) dismiss(); // caller gone
+      else if (memberships.length === 0)
+        dismiss(); // caller gone
+      // [Gitea #312] The session can be stale after a reload; the room state isn't.
+      else if (!hasActiveCallMembership(room, callInfo.sender)) dismiss();
     };
     const onTimeline: EventTimelineSetHandlerMap[RoomEvent.Timeline] = (
       event,