chore(desktop): Tauri 命令 @reserved 全量标注 — 88个无前端调用命令已标注

- 新增 66 个 @reserved 标注 (已有 22 个)
- 覆盖: agent/butler/classroom/hand/mcp/pipeline/skill/trigger/viking/zclaw 等模块
- MCP 命令增加 @connected 注释说明前端接入路径
- @reserved 总数: 89 (含 identity_init)

desktop/src-tauri/src/kernel_commands/agent.rs

@@ -68,6 +68,7 @@ pub struct AgentUpdateRequest {
 // ---------------------------------------------------------------------------
 
 /// Create a new agent
+// @reserved: agent CRUD management
 // @connected
 #[tauri::command]
 pub async fn agent_create(
@@ -150,6 +151,7 @@ pub async fn agent_create(
 }
 
 /// List all agents
+// @reserved: agent CRUD management
 // @connected
 #[tauri::command]
 pub async fn agent_list(
@@ -164,6 +166,7 @@ pub async fn agent_list(
 }
 
 /// Get agent info (with optional UserProfile from memory store)
+// @reserved: agent CRUD management
 // @connected
 #[tauri::command]
 pub async fn agent_get(