refactor: enhance skills and subagents settings management

- Updated useSkillsSettings and useSubagents hooks to improve state management and error handling.
- Added new settings API methods for skills configuration and agent discovery.
- Refactored app-store to include enableSkills and skillsSources state management.
- Enhanced settings migration to sync skills configuration with the server.

These changes streamline the management of skills and subagents, ensuring better integration and user experience.

apps/ui/src/hooks/use-settings-migration.ts

@@ -234,6 +234,8 @@ export async function syncSettingsToServer(): Promise<boolean> {
       keyboardShortcuts: state.keyboardShortcuts,
       aiProfiles: state.aiProfiles,
       mcpServers: state.mcpServers,
+      enableSkills: state.enableSkills,
+      skillsSources: state.skillsSources,
       promptCustomization: state.promptCustomization,
       projects: state.projects,
       trashedProjects: state.trashedProjects,