fix: resolve 3 bugs - panText undefined, cloud project load, auto-restore error handling

app/static/js/app.jsx

@@ -741,6 +741,7 @@ const MasterStripConsole = ({ masterVolume, setMasterVolume, showMasteringModal,
   const [isMuted, setIsMuted] = React.useState(false);
   const [isMono, setIsMono] = React.useState(false);
   const [pan, setPan] = React.useState(0.0);
+  const [panText, setPanText] = React.useState('center');
 
   const vuCanvasRef = React.useRef(null);
   const animFrameRef = React.useRef(null);
@@ -4683,7 +4684,7 @@ const ProfileModal = ({
             });
           }
           setTracks(restoredTracks);
-          loadAudioBuffersForTracks(restoredTracks);
+          loadAudioBuffersForTracks(restoredTracks).catch(function(err) { console.warn('loadAudioBuffersForTracks error:', err); });
           setBpm(restoredBpm.toString());
           setSelectedTrackId(restoredTracks[0]?.id || '1');
           setProjectName(proj.name);
@@ -10060,7 +10061,7 @@ const App = () => {
         });
       }
       setTracks(restoredTracks);
-      loadAudioBuffersForTracks(restoredTracks);
+      loadAudioBuffersForTracks(restoredTracks).catch(function(err) { console.warn('loadAudioBuffersForTracks error:', err); });
       setBpm(restoredBpm.toString());
       setSelectedTrackId(restoredTracks[0]?.id || '1');
       setProjectName(lastName);
@@ -10076,10 +10077,7 @@ const App = () => {
       });
       showToast('Đã khôi phục dự án "' + lastName + '" (' + restoredItemCount + ' items).', 'info');
     } catch(e) {
-      if (!lastId.startsWith('local_')) {
-        localStorage.removeItem('sonic_project_id');
-        localStorage.removeItem('sonic_project_name');
-      }
+      console.warn('restoreLastSessionProject failed:', e);
     }
   };