feat(commands): 实现命令 CRUD 完整功能

Core:
- 新增 CommandManager 类，支持创建、更新、删除命令
- 验证命令名称防止路径遍历攻击
- 自动生成 Markdown 文件（含 YAML frontmatter）
- 内置命令保护（不可修改/删除）

Server:
- POST /api/commands - 创建命令
- GET /api/commands/:name/content - 获取命令完整内容
- PUT /api/commands/:name - 更新命令
- DELETE /api/commands/:name - 删除命令

UI:
- 新增 createCommand、updateCommand、deleteCommand、getCommandContent 函数
- 新增 CreateCommandInput、UpdateCommandInput、CommandContent 类型

packages/ui/src/api/client.ts

@@ -14,6 +14,9 @@ import type {
   CommandSearchResult,
   CommandExecuteResult,
   CommandListResponse,
+  CreateCommandInput,
+  UpdateCommandInput,
+  CommandContent,
 } from './types.js';
 
 // Re-export types
@@ -31,6 +34,9 @@ export type {
   CommandSearchResult,
   CommandExecuteResult,
   CommandListResponse,
+  CreateCommandInput,
+  UpdateCommandInput,
+  CommandContent,
 } from './types.js';
 
 // API Configuration
@@ -203,3 +209,29 @@ export async function reloadCommands(): Promise<{
 }> {
   return request('POST', '/commands/reload');
 }
+
+// Commands CRUD
+export async function createCommand(
+  input: CreateCommandInput
+): Promise<{ success: boolean; data?: { name: string; path: string }; error?: string }> {
+  return request('POST', '/commands', input);
+}
+
+export async function getCommandContent(
+  name: string
+): Promise<{ success: boolean; data?: CommandContent; error?: string }> {
+  return request('GET', `/commands/${encodeURIComponent(name)}/content`);
+}
+
+export async function updateCommand(
+  name: string,
+  input: UpdateCommandInput
+): Promise<{ success: boolean; data?: { name: string; path: string }; error?: string }> {
+  return request('PUT', `/commands/${encodeURIComponent(name)}`, input);
+}
+
+export async function deleteCommand(
+  name: string
+): Promise<{ success: boolean; data?: { name: string; path: string }; error?: string }> {
+  return request('DELETE', `/commands/${encodeURIComponent(name)}`);
+}