feat: ws simple setup only

common/exceptions/websocket.ts

@@ -0,0 +1,29 @@
+import { Catch, ArgumentsHost } from '@nestjs/common';
+import { BaseWsExceptionFilter, WsException } from '@nestjs/websockets';
+
+@Catch()
+export class WsValidationExceptionFilter extends BaseWsExceptionFilter {
+  catch(exception: unknown, host: ArgumentsHost) {
+    const client = host.switchToWs().getClient();
+    if (exception instanceof WsException) {
+      client.emit('exception', {
+        status: 'error',
+        message: exception.getError(),
+      });
+      return;
+    }
+
+    // Handle ValidationPipe errors (they come as plain objects, not WsException)
+    if (
+      Array.isArray((exception as any)?.response?.message)
+    ) {
+      client.emit('exception', {
+        status: 'error',
+        message: (exception as any).response.message,
+      });
+      return;
+    }
+
+    super.catch(exception, host);
+  }
+}