feat: implement API-first settings management and description history tracking

- Migrated settings persistence from localStorage to an API-first approach, ensuring consistency between Electron and web modes.
- Introduced `useSettingsSync` hook for automatic synchronization of settings to the server with debouncing.
- Enhanced feature update logic to track description changes with a history, allowing for better management of feature descriptions.
- Updated various components and services to utilize the new settings structure and description history functionality.
- Removed persist middleware from Zustand store, streamlining state management and improving performance.

apps/server/src/routes/features/routes/update.ts

@@ -10,11 +10,14 @@ import { getErrorMessage, logError } from '../common.js';
 export function createUpdateHandler(featureLoader: FeatureLoader) {
   return async (req: Request, res: Response): Promise<void> => {
     try {
-      const { projectPath, featureId, updates } = req.body as {
-        projectPath: string;
-        featureId: string;
-        updates: Partial<Feature>;
-      };
+      const { projectPath, featureId, updates, descriptionHistorySource, enhancementMode } =
+        req.body as {
+          projectPath: string;
+          featureId: string;
+          updates: Partial<Feature>;
+          descriptionHistorySource?: 'enhance' | 'edit';
+          enhancementMode?: 'improve' | 'technical' | 'simplify' | 'acceptance';
+        };
 
       if (!projectPath || !featureId || !updates) {
         res.status(400).json({
@@ -24,7 +27,13 @@ export function createUpdateHandler(featureLoader: FeatureLoader) {
         return;
       }
 
-      const updated = await featureLoader.update(projectPath, featureId, updates);
+      const updated = await featureLoader.update(
+        projectPath,
+        featureId,
+        updates,
+        descriptionHistorySource,
+        enhancementMode
+      );
       res.json({ success: true, feature: updated });
     } catch (error) {
       logError(error, 'Update feature failed');