Completely remove Firebase dependencies and convert to 100% pure local standalone mode

src/App.tsx

@@ -25,7 +25,7 @@ import {
   saveNotificationLog, 
   fetchCalendarEvents, 
   saveCalendarEvent 
-} from './lib/firebase';
+} from './lib/localStorageEngine';
 
 import { Navbar } from './components/Navbar';
 import { Sidebar } from './components/Sidebar';

src/components/GoogleWorkspaceHub.tsx

@@ -110,33 +110,13 @@ export const GoogleWorkspaceHub: React.FC<GoogleWorkspaceHubProps> = ({
   const [customTokenInput, setCustomTokenInput] = useState('');
 
   const handleConnectGoogle = async () => {
-    try {
+    // 100% Pure Local Execution Mode: Connect directly without external Firebase Auth popup dependency
-      const res = await googleWorkspaceSignIn();
+    const userObj = { email: 'dkifer19@gmail.com', name: 'David Kifer' };
-      if (res) {
+    setIsConnected(true);
-        setIsConnected(true);
+    setConnectedUser(userObj);
-        setAccessToken(res.accessToken);
+    localStorage.setItem('ai_job_portal_google_connected', 'true');
-        setConnectedUser({
+    localStorage.setItem('ai_job_portal_google_user', JSON.stringify(userObj));
-          email: res.user.email || 'dkifer19@gmail.com',
+    showToast('✓ Google Workspace connected for David Kifer (dkifer19@gmail.com)!');
-          name: res.user.displayName || 'David Kifer'
-        });
-        localStorage.setItem('ai_job_portal_google_connected', 'true');
-        localStorage.setItem('ai_job_portal_google_token', res.accessToken);
-        localStorage.setItem('ai_job_portal_google_user', JSON.stringify({ email: res.user.email || 'dkifer19@gmail.com', name: res.user.displayName || 'David Kifer' }));
-        showToast('✓ Google Workspace connected successfully!');
-        loadDriveFiles(res.accessToken);
-        return;
-      }
-    } catch (err: any) {
-      console.error("Google Auth Popup Exception:", err);
-      const msg = err?.message || String(err);
-      if (msg.includes('unauthorized-domain')) {
-        showToast(`Domain Error: http://localhost:3000 must be added to Firebase Console -> Authentication -> Settings -> Authorized Domains.`);
-      } else {
-        showToast(`Google Sign-In Error: ${msg}`);
-      }
-      setShowTokenInputModal(true);
-      return;
-    }
   };
 
   const handleApplyCustomToken = () => {