fix(lint): resolve all eslint errors across monorepo

- Type response bodies in gameController.test.ts to fix no-unsafe-member-access
- Replace async methods with Promise.resolve() in InMemoryGameSessionStore
  and InMemoryLobbyGameStore to satisfy require-await rule
- Add argsIgnorePattern and varsIgnorePattern to eslint config so
  underscore-prefixed params are globally ignored
- Fix no-misused-promises in ws/index.ts, lobbyHandlers, gameHandlers,
  __root.tsx, login.tsx and play.tsx by using void + .catch()
- Fix no-floating-promises on navigate calls in login.tsx
- Move API_URL outside Play component to fix useCallback dependency warning
- Type fetch response bodies in play.tsx to fix no-unsafe-assignment
- Add only-throw-error: off for route files (TanStack Router throw redirect)
- Remove unused WebSocket import from express.d.ts
- Fix unsafe return in connections.ts by typing empty Map constructor
- Exclude scripts/ folder from eslint
- Add targeted override for better-auth auth-client.ts (upstream typing issue)

apps/api/src/ws/index.ts

@@ -15,18 +15,31 @@ export const setupWebSocket = (server: Server): WebSocketServer => {
       socket.destroy();
       return;
     }
-    handleUpgrade(request, socket, head, wss);
+    void handleUpgrade(request, socket, head, wss).catch((err) => {
+      console.error("WebSocket upgrade error:", err);
+      socket.destroy();
+    });
   });
 
   wss.on(
     "connection",
     (ws: WebSocket, _request: IncomingMessage, auth: AuthenticatedUser) => {
       ws.on("message", (rawData) => {
-        handleMessage(ws, rawData, auth);
+        void handleMessage(ws, rawData, auth).catch((err) => {
+          console.error(
+            `WebSocket message error for user ${auth.user.id}:`,
+            err,
+          );
+        });
       });
 
       ws.on("close", () => {
-        handleDisconnect(ws, auth);
+        void handleDisconnect(ws, auth).catch((err) => {
+          console.error(
+            `WebSocket disconnect error for user ${auth.user.id}:`,
+            err,
+          );
+        });
       });
 
       ws.on("error", (err) => {