feat: enhance token usage tracking and history management

- Updated HTML assets for improved loading.
- Integrated token usage tracking in chat processing, appending usage details to transcripts.
- Enhanced OpenAIProvider to include usage data in chat completion responses.
- Implemented asynchronous retrieval of recent token usage history.
- Added utility functions for managing transcript files and parsing usage data.
- Updated UI components to reflect changes in usage status handling.
- Ensured consistent usage status definitions across the application.

electron/main.ts

@@ -82,7 +82,8 @@ async function handleLocalProviderApi(path: string, method: string, body: any) {
     return { success: true, ok: true, json: result, data: result };
   }
   if (path === '/api/usage/recent-token-history' && method === 'GET') {
-    return { success: true, ok: true, json: providerApiService.getUsageHistory(), data: providerApiService.getUsageHistory() };
+    const usageHistory = await providerApiService.getUsageHistory();
+    return { success: true, ok: true, json: usageHistory, data: usageHistory };
   }
   return null;
 }