Fix pingerName crash + auto-redirect returning users to last room

1. Server: pingerName was used before declaration in the WS message
   block (defined inside the push block). Moved declaration above both
   blocks. This caused all /push/request-location calls to crash with
   ReferenceError.

2. Landing page: always auto-redirect returning users (have saved user
   + last room) instead of only in standalone mode. Shows a loading
   spinner during redirect so the landing page doesn't flash.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/page.tsx

@@ -25,6 +25,7 @@ export default function HomePage() {
   const [roomName, setRoomName] = useState('');
   const [isLoaded, setIsLoaded] = useState(false);
   const [lastRoom, setLastRoom] = useState<string | null>(null);
+  const [isRedirecting, setIsRedirecting] = useState(false);
 
   // Load saved user info from localStorage on mount
   // If opened as installed PWA (standalone mode), auto-redirect to last room
@@ -45,10 +46,9 @@ export default function HomePage() {
       if (lastVisited) {
         setLastRoom(lastVisited);
 
-        // Auto-redirect if running as installed PWA and user has saved info
-        const isStandalone = window.matchMedia('(display-mode: standalone)').matches
-          || (navigator as unknown as { standalone?: boolean }).standalone === true;
-        if (isStandalone && stored) {
+        // Auto-redirect returning users to their last room
+        if (stored) {
+          setIsRedirecting(true);
           router.push(`/${lastVisited}`);
           return;
         }
@@ -108,6 +108,18 @@ export default function HomePage() {
     router.push(`/${lastRoom}`);
   };
 
+  // Show loading screen while redirecting to last room
+  if (isRedirecting) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-slate-900">
+        <div className="text-center">
+          <div className="w-8 h-8 border-2 border-emerald-500 border-t-transparent rounded-full animate-spin mx-auto mb-4" />
+          <div className="text-white/60">Rejoining your map...</div>
+        </div>
+      </div>
+    );
+  }
+
   return (
     <div className="min-h-screen bg-gradient-to-br from-slate-900 via-slate-800 to-slate-900">
       {/* ── Header Nav ─────────────────────────────────────────── */}

sync-server/server.js

@@ -709,6 +709,8 @@ const server = createServer(async (req, res) => {
         targetName = room.participants[participantId].name;
       }
 
+      const pingerName = callerName || 'Someone';
+
       // Build a set of participantIds that are currently connected via WebSocket
       const onlineParticipantIds = new Set();
       for (const [ws, clientInfo] of clients.entries()) {
@@ -754,7 +756,6 @@ const server = createServer(async (req, res) => {
       const subsMap = pushSubscriptions.get(roomSlug);
       if (subsMap && subsMap.size > 0) {
         const failedEndpoints = [];
-        const pingerName = callerName || 'Someone';
 
         for (const [endpoint, { subscription, participantId: subParticipantId }] of subsMap.entries()) {
           // If targeting specific participant, skip others