feat: Introduce multi-platform architecture for Electron and Web clients with shared UI components, Convex backend for messaging, and integrated search functionality.

packages/shared/src/App.jsx

@@ -4,6 +4,7 @@ import Login from './pages/Login';
 import Register from './pages/Register';
 import Chat from './pages/Chat';
 import { usePlatform } from './platform';
+import { useSearch } from './contexts/SearchContext';
 
 const THIRTY_DAYS_MS = 30 * 24 * 60 * 60 * 1000;
 
@@ -12,6 +13,7 @@ function AuthGuard({ children }) {
   const location = useLocation();
   const navigate = useNavigate();
   const { session, settings } = usePlatform();
+  const searchCtx = useSearch();
 
   useEffect(() => {
     let cancelled = false;
@@ -19,6 +21,7 @@ function AuthGuard({ children }) {
     async function restoreSession() {
       // Already have keys in sessionStorage — current session is active
       if (sessionStorage.getItem('privateKey') && sessionStorage.getItem('signingKey')) {
+        searchCtx?.initialize();
         if (!cancelled) setAuthState('authenticated');
         return;
       }
@@ -34,6 +37,8 @@ function AuthGuard({ children }) {
             if (savedSession.publicKey) localStorage.setItem('publicKey', savedSession.publicKey);
             sessionStorage.setItem('signingKey', savedSession.signingKey);
             sessionStorage.setItem('privateKey', savedSession.privateKey);
+            if (savedSession.searchDbKey) sessionStorage.setItem('searchDbKey', savedSession.searchDbKey);
+            searchCtx?.initialize();
             // Restore user preferences from file-based backup into localStorage
             if (settings) {
               try {