v0.7.1 minor bug fixes

frontend/src/pages/Chat.jsx

@@ -194,9 +194,21 @@ export default function Chat() {
       });
     };
 
+    // Session displaced: another login on the same device type kicked us out
+    const handleSessionDisplaced = ({ device: displacedDevice }) => {
+      // Only act if it's our device slot that was taken over
+      // (The server emits to user room so all sockets of this user receive it;
+      //  our socket's device is embedded in the socket but we can't read it here,
+      //  so we force logout unconditionally — the new session will reconnect cleanly)
+      localStorage.removeItem('tc_token');
+      sessionStorage.removeItem('tc_token');
+      window.dispatchEvent(new CustomEvent('jama:session-displaced'));
+    };
+
     socket.on('group:new', handleGroupNew);
     socket.on('group:deleted', handleGroupDeleted);
     socket.on('group:updated', handleGroupUpdated);
+    socket.on('session:displaced', handleSessionDisplaced);
 
     // Bug B fix: on reconnect, reload groups to catch any messages missed while offline
     const handleReconnect = () => { loadGroups(); };
@@ -217,6 +229,7 @@ export default function Chat() {
       socket.off('group:deleted', handleGroupDeleted);
       socket.off('group:updated', handleGroupUpdated);
       socket.off('connect', handleReconnect);
+      socket.off('session:displaced', handleSessionDisplaced);
       document.removeEventListener('visibilitychange', handleVisibility);
     };
   }, [socket, toast, activeGroupId, user, isMobile, loadGroups]);