feat(oauth): add Qwen OAuth integration

packages/cli/src/config/auth.ts

@@ -45,6 +45,12 @@ export const validateAuthMethod = (authMethod: string): string | null => {
     return null;
   }
 
+  if (authMethod === AuthType.QWEN_OAUTH) {
+    // Qwen OAuth doesn't require any environment variables for basic setup
+    // The OAuth flow will handle authentication
+    return null;
+  }
+
   return 'Invalid auth method selected.';
 };