Add login page and social login integration

- Implement `LoginPage`, `LoginForm`, and `SocialForm` components.
- Add language toggle and dynamic title support.
- Update `tsconfig.electron.json` for stricter settings.
- Add `electron-store` and associated types for token storage.
- Update `package.json` scripts and dependencies for Electron compatibility.

components/UserMenu.tsx

@@ -30,9 +30,17 @@ export default function UserMenu() {
         };
     }, [isProfileMenuOpen]);
     
-    function handleLogout(): void {
+    async function handleLogout(): Promise<void> {
         System.removeCookie("token");
-        document.location.href = "https://eritors.com/login";
+
+        // Si dans Electron, utiliser IPC pour logout
+        if (window.electron) {
+            await window.electron.removeToken();
+            window.electron.logout();
+        } else {
+            // Fallback web
+            document.location.href = "https://eritors.com/login";
+        }
     }
 
     return (