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/api/router.ts

@@ -1,6 +1,7 @@
 import { BrowserWindow } from 'electron';
 import { gatewayManager } from '@electron/gateway/manager';
 import { providerApiService } from '@electron/service/provider-api-service';
+import { ClawHubService } from '@electron/gateway/clawhub';
 import type { HostApiContext } from './context';
 import type { HostApiRequest } from './route-utils';
 import { normalizeRequest } from './route-utils';
@@ -13,6 +14,7 @@ import { handleKnowledgeRoutes } from './routes/knowledge';
 import { handleModelRoutes } from './routes/models';
 import { handleProviderRoutes } from './routes/providers';
 import { handleSessionRoutes } from './routes/sessions';
+import { handleSkillRoutes } from './routes/skills';
 
 type RouteHandler = (
   request: ReturnType<typeof normalizeRequest>,
@@ -29,6 +31,7 @@ const routeHandlers: RouteHandler[] = [
   handleKnowledgeRoutes,
   handleFileRoutes,
   handleSessionRoutes,
+  handleSkillRoutes,
 ];
 
 function createContext(): HostApiContext {
@@ -36,6 +39,7 @@ function createContext(): HostApiContext {
     gatewayManager,
     providerApiService,
     mainWindow: BrowserWindow.getAllWindows()[0] ?? null,
+    clawHubService: new ClawHubService(),
   };
 }