Clean up code and fix authentication

frontend/electron/main.ts

@@ -18,11 +18,9 @@ app.whenReady().then(() => {
         titleBarOverlay: process.platform !== "darwin"
     })
 
-    // You can use `process.env.VITE_DEV_SERVER_URL` when the vite command is called `serve`
     if (process.env.VITE_DEV_SERVER_URL) {
         win.loadURL(process.env.VITE_DEV_SERVER_URL)
     } else {
-        // Load your file
         win.loadFile('dist/index.html');
     }
 });

frontend/src/ui/state.ts

@@ -199,10 +199,12 @@ export const useAppState = create<AppState>((set, get) => ({
             const token = localStorage.getItem('authToken');
             
             if (token) {
-                const user: User = await (await fetch("/api/user/profile", {
+                const response = await fetch("/api/user/profile", {
                     headers: getAuthHeaders(token)
-                })).json();
+                });
 
+                if (response.ok) {
+                    const user: User = await response.json();
                     restoreKeys();
 
                     set(() => ({
@@ -212,6 +214,9 @@ export const useAppState = create<AppState>((set, get) => ({
                         },
                         currentPage: "chat"
                     }));
+                } else {
+                    throw new Error("Unable to authenticate");
+                }
             }
         } catch (error) {
             console.error('Failed to restore user from localStorage:', error);