feat(opencode): add OpenCode toggle switches to MCP and Skills panels

- Add opencode to AppType and SkillApps interfaces in skills.ts
- Add OpenCode Switch component to UnifiedMcpPanel list items
- Add OpenCode Switch component to UnifiedSkillsPanel list items
- Include OpenCode in enabled counts and header statistics for both panels

src/lib/api/skills.ts

@@ -2,13 +2,14 @@ import { invoke } from "@tauri-apps/api/core";
 
 // ========== 类型定义 ==========
 
-export type AppType = "claude" | "codex" | "gemini";
+export type AppType = "claude" | "codex" | "gemini" | "opencode";
 
 /** Skill 应用启用状态 */
 export interface SkillApps {
   claude: boolean;
   codex: boolean;
   gemini: boolean;
+  opencode: boolean;
 }
 
 /** 已安装的 Skill（v3.10.0+ 统一结构） */