fix: resolve all TypeScript errors in web app

apps/web/src/hooks/useWebSocket.test.tsx

@@ -14,14 +14,16 @@ describe('useWebSocket', () => {
     eventHandlers = {};
 
     mockSocket = {
-      on: vi.fn((event: string, handler: (data: unknown) => void) => {
+      on: vi.fn((event: string, handler: (...args: any[]) => void) => {
         eventHandlers[event] = handler;
         return mockSocket as Socket;
-      }),
-      off: vi.fn((event: string) => {
-        delete eventHandlers[event];
+      }) as any,
+      off: vi.fn((event?: string) => {
+        if (event) {
+          delete eventHandlers[event];
+        }
         return mockSocket as Socket;
-      }),
+      }) as any,
       connect: vi.fn(),
       disconnect: vi.fn(),
       connected: false,