feat(web): refactor MCP servers as sidebar entities and improve sidebar footer

- Refactor MCP servers to be managed as collapsible sidebar sub-items with
  ?id= detail routing and inline form (matching bots/pipelines pattern)
- Add MCPDetailContent with create/edit modes, enable toggle, and danger zone
- Extract MCPForm as standalone inline form from MCPFormDialog
- Move API Integration to standalone sidebar footer button
- Add GitHub star CTA with live star count badge in user dropdown menu
- Add MCP server status dot indicators in sidebar (green/gray for enabled/disabled)
- Add i18n keys for MCP detail page and GitHub star CTA in all 4 locales

web/src/app/infra/http/CloudServiceClient.ts

@@ -97,6 +97,10 @@ export class CloudServiceClient extends BaseHttpClient {
     return this.get<GitHubRelease[]>('/api/v1/dist/info/releases');
   }
 
+  public getGitHubRepoInfo(): Promise<GitHubRepoInfo> {
+    return this.get<GitHubRepoInfo>('/api/v1/dist/info/repo');
+  }
+
   public getAllTags(): Promise<{ tags: PluginTag[] }> {
     return this.get<{ tags: PluginTag[] }>('/api/v1/marketplace/tags');
   }
@@ -134,3 +138,13 @@ export interface GitHubRelease {
   prerelease: boolean;
   draft: boolean;
 }
+
+export interface GitHubRepoInfo {
+  repo: {
+    stargazers_count: number;
+    forks_count: number;
+    open_issues_count: number;
+    [key: string]: unknown;
+  };
+  contributors: unknown[];
+}