Merge remote-tracking branch 'origin/likun' into ji

# Conflicts:
#	frontend-web/src/components/workspace/artifacts/artifact-file-detail.tsx
#	frontend-web/src/components/workspace/code-editor.tsx
#	frontend-web/src/components/workspace/input-box.tsx
#	frontend-web/src/pages/ChatPage.tsx
#	offline-backend-20260512/backend/app/gateway/routers/artifacts.py

frontend-web/src/core/settings/local.ts

@@ -8,11 +8,12 @@ export const DEFAULT_LOCAL_SETTINGS: LocalSettings = {
     streamSpeedMeterEnabled: false,
   },
   context: {
-    model_name: undefined,
-    mode: undefined,
-    reasoning_effort: undefined,
-  },
-};
+    model_name: undefined,
+    mode: undefined,
+    reasoning_effort: undefined,
+    writing_mode: false,
+  },
+};
 
 export const LOCAL_SETTINGS_KEY = "deerflow.local-settings";
 export const THREAD_MODEL_KEY_PREFIX = "deerflow.thread-model.";