refactor: enforce strict linting rules, replace forEach with for...of loops, and remove console logging throughout the frontend.

frontend/src/hooks/useAuth.ts

@@ -36,8 +36,7 @@ export const useAuth = () => {
   const logout = async () => {
     try {
       await api.post(endpoints.LOGOUT);
-    } catch (error) {
-      console.error("Logout failed:", error);
+    } catch (_error) {
     } finally {
       clearAuth();
       setMasterKey(null);