feat: Enhance Marketplace and Skill Management UI with improved error handling and user feedback

- Updated MarketplaceDrawer to include security notes and manual installation hints.
- Refactored SkillDetailDrawer to display default icons for skills.
- Simplified SkillListItem to use default icons for better readability.
- Integrated gateway status checks and warnings in SkillsPage for improved user awareness.
- Enhanced error handling for skill installation and fetching, providing clearer feedback to users.
- Added new translations for error messages and gateway warnings to improve localization support.

electron/gateway/manager.ts

@@ -4,6 +4,7 @@ import logManager from '@electron/service/logger';
 import type { GatewayEvent, RuntimeRefreshTopic } from './types';
 import * as chatHandlers from './handlers/chat';
 import * as providerHandlers from './handlers/provider';
+import * as skillHandlers from './handlers/skills';
 
 type RuntimeChangeBroadcast = {
   topics: RuntimeRefreshTopic[];
@@ -94,6 +95,10 @@ class GatewayManager {
         return providerHandlers.handleProviderList();
       case 'provider.getDefault':
         return providerHandlers.handleProviderGetDefault();
+      case 'skills.status':
+        return skillHandlers.handleSkillsStatus();
+      case 'skills.update':
+        return skillHandlers.handleSkillsUpdate(params);
       default:
         throw new Error(`Unknown gateway RPC method: ${method}`);
     }