fix: improve VS Code config synchronization and code formatting

- Add automatic VS Code config sync when base_url changes in TOML
- Improve error handling for VS Code configuration writes
- Enhance state management with ref tracking to prevent duplicate API calls
- Fix code formatting issues and improve readability across components
- Optimize common configuration handling for both Claude and Codex providers

src/components/JsonEditor.tsx

@@ -62,7 +62,7 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
 
         return diagnostics;
       }),
-    [showValidation]
+    [showValidation],
   );
 
   useEffect(() => {