fix(status): any Lotus device clears an auto-expiring status, not just the one that set it (#300)

"Clear after 1 hour" lived in that device's localStorage, so a status
set on a laptop that was then closed stayed on the server until the
laptop opened Lotus again. The expiry is now also kept in account data
(io.lotus.status_expiry: { status_msg, expires_at }). Every device's
StatusExpiryMonitor clears the status when due, but only if it is still
the one that was set to expire (otherwise it just forgets the expiry).

Fixes #300

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

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -91,6 +91,7 @@ import {
   shouldNotifyThreadReply,
   THREAD_NOTIFICATIONS_FALLBACK_BEHAVIOR,
 } from '../../utils/threadNotifications';
+import { readStatusExpiry, statusExpiryAction, writeStatusExpiry } from '../../utils/statusExpiry';
 
 // Grace period after the initial sync settles before invite notifications arm, so
 // the async invite-atom population lands first and isn't mistaken for new invites.
@@ -427,12 +428,7 @@ function StatusExpiryMonitor() {
     // permanently and the status stayed set forever. Retry the write (honouring
     // Retry-After), and only forget the status once the server has taken it.
     let clearing = false;
-    const check = () => {
-      if (clearing) return;
-      const stored = localStorage.getItem(expiryKey);
-      if (!stored) return;
-      const ts = parseInt(stored, 10);
-      if (!ts || Date.now() < ts) return;
+    const clearStatus = () => {
       clearing = true;
       setPresenceWithRetry(mx, {
         presence: presenceStateFromSetting(presenceStatusRef.current, hidePresenceRef.current),
@@ -442,12 +438,31 @@ function StatusExpiryMonitor() {
           noteLocalStatusWrite();
           localStorage.removeItem(msgKey);
           localStorage.removeItem(expiryKey);
+          writeStatusExpiry(mx, '').catch(() => undefined);
         })
         .catch(() => undefined)
         .finally(() => {
           clearing = false;
         });
     };
+    const check = () => {
+      if (clearing) return;
+      const stored = localStorage.getItem(expiryKey);
+      const ts = stored ? parseInt(stored, 10) : 0;
+      if (ts && Date.now() >= ts) {
+        clearStatus();
+        return;
+      }
+      // [Gitea #300] An expiry set on another device (account data): clear the
+      // status if it is still that one, otherwise just forget the expiry.
+      const action = statusExpiryAction(
+        readStatusExpiry(mx),
+        mx.getUser(userId)?.presenceStatusMsg,
+        Date.now(),
+      );
+      if (action === 'clear') clearStatus();
+      else if (action === 'forget') writeStatusExpiry(mx, '').catch(() => undefined);
+    };
 
     check();
     // Poll often enough that a rate-limited retry lands promptly, but not so