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/handlers/skills.ts

@@ -0,0 +1,45 @@
+import { getAllSkillConfigs, updateSkillConfig } from '@electron/utils/skill-config';
+import type { GatewayRpcReturns } from '../types';
+
+export async function handleSkillsStatus(): Promise<GatewayRpcReturns['skills.status']> {
+  const configs = await getAllSkillConfigs();
+
+  return {
+    skills: Object.entries(configs).map(([skillKey, config]) => ({
+      skillKey,
+      slug: config.slug || skillKey,
+      name: config.name || skillKey,
+      description: config.description || '',
+      disabled: config.enabled === false,
+      emoji: config.icon,
+      version: config.version || '1.0.0',
+      author: config.author,
+      config: {
+        ...(config.config || {}),
+        ...(config.apiKey ? { apiKey: config.apiKey } : {}),
+        ...(config.env ? { env: config.env } : {}),
+      },
+      bundled: typeof config.isBundled === 'boolean' ? config.isBundled : config.source === 'openclaw-bundled',
+      always: Boolean(config.isCore),
+      source: config.source,
+      baseDir: config.baseDir,
+      filePath: config.filePath,
+    })),
+  };
+}
+
+export async function handleSkillsUpdate(
+  params: { skillKey: string; enabled?: boolean },
+): Promise<GatewayRpcReturns['skills.update']> {
+  const { skillKey, enabled } = params;
+  if (!skillKey || !String(skillKey).trim()) {
+    throw new Error('skillKey is required');
+  }
+
+  const result = await updateSkillConfig(String(skillKey).trim(), { enabled });
+  if (!result.success) {
+    throw new Error(result.error || 'Failed to update skill');
+  }
+
+  return { success: true };
+}