feat: mock配置迁移至JSON格式并修复body匹配

- 将mock配置从YAML格式迁移到JSON格式
- 修复JSON字符串格式body匹配失败问题
- 添加MCP功能模块
- 更新mock-spec.md规范文档

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/rules/mock-spec.md

@@ -1,26 +1,26 @@
 ---
 paths:
-  - "mocks/**/*.{yml,yaml}"
+  - "mocks/**/*.json"
 ---
 
-## YAML 配置规范
+## JSON 配置规范
 
 AI 在生成 Mock 规则时必须遵循以下格式。
 
 ### 字段说明
 
-| 字段 | 类型 | 必填 | 说明 |
-|------|------|:----:|------|
-| id | string | 是 | 规则唯一标识 |
-| request.method | string | 是 | HTTP 方法 (GET/POST/PUT/DELETE...) |
-| request.path | string | 是 | 请求路径，精确匹配 |
-| request.query_params | object | 否 | 查询参数匹配 |
-| request.headers | object | 否 | 请求头匹配（大小写不敏感） |
-| request.body | any | 否 | 请求体匹配，支持 JSON 对象或字符串 |
-| response.status | number | 是 | HTTP 状态码 |
-| response.headers | object | 否 | 响应头 |
-| response.body | string | 是 | 响应体，支持 file:// 前缀 |
-| settings.delay_ms | number | 否 | 延迟响应（毫秒） |
+| 字段                   | 类型     | 必填 | 说明                               |
+|----------------------|--------|:--:|----------------------------------|
+| name                 | string | 是  | 规则唯一标识                           |
+| request.method       | string | 是  | HTTP 方法 (GET/POST/PUT/DELETE...) |
+| request.path         | string | 是  | 请求路径，精确匹配                        |
+| request.query_params | object | 否  | 查询参数匹配                           |
+| request.headers      | object | 否  | 请求头匹配（大小写不敏感）                    |
+| request.body         | any    | 否  | 请求体匹配，支持 JSON 对象或字符串             |
+| response.status      | number | 是  | HTTP 状态码                         |
+| response.headers     | object | 否  | 响应头                              |
+| response.body        | string | 是  | 响应体，支持 file:// 前缀                |
+| settings.delay_ms    | number | 否  | 延迟响应（毫秒）                         |
 
 ### 匹配规则
 
@@ -30,58 +30,91 @@ AI 在生成 Mock 规则时必须遵循以下格式。
 
 ### 配置示例
 
-**单接口模式：**
+**基础示例：**
 
-```yaml
-id: "login"
-request:
-  method: "POST"
-  path: "/api/login"
-  body: { "username": "test" }
-response:
-  status: 200
-  body: '{"token": "xxx"}'
-settings:
-  delay_ms: 100
-```
-
-**多接口模式（数组）：**
-
-```yaml
-- id: "get-users"
-  request: { method: "GET", path: "/api/users" }
-  response: { status: 200, body: '{"users": []}' }
-
-- id: "create-user"
-  request: { method: "POST", path: "/api/users" }
-  response: { status: 201, body: '{"id": 1}' }
+```json
+{
+  "name": "login",
+  "request": {
+    "method": "POST",
+    "path": "/v1/auth/login",
+    "body": {
+      "username": "user001",
+      "password": "password123"
+    }
+  },
+  "response": {
+    "status": 200,
+    "headers": {
+      "Content-Type": "application/json"
+    },
+    "body": "{\"token\": \"xxx\"}"
+  },
+  "settings": {
+    "delay_ms": 100
+  }
+}
 ```
 
 **带查询参数和请求头：**
 
-```yaml
-id: "search-users"
-request:
-  method: "GET"
-  path: "/api/users"
-  query_params: { "role": "admin" }
-  headers: { "Authorization": "Bearer token" }
-response:
-  status: 200
-  headers: { "X-Total-Count": "100" }
-  body: '{"users": []}'
+```json
+{
+  "name": "search_users",
+  "request": {
+    "method": "GET",
+    "path": "/v1/users",
+    "query_params": {
+      "role": "admin"
+    },
+    "headers": {
+      "Authorization": "Bearer token"
+    }
+  },
+  "response": {
+    "status": 200,
+    "headers": {
+      "X-Total-Count": "100"
+    },
+    "body": "{\"users\": []}"
+  }
+}
 ```
 
 **文件响应：**
 
-```yaml
-id: "download-pdf"
-request:
-  method: "GET"
-  path: "/api/download"
-response:
-  status: 200
-  body: "file://./data/large-file.pdf"
+```json
+{
+  "name": "download_pdf",
+  "request": {
+    "method": "GET",
+    "path": "/v1/download"
+  },
+  "response": {
+    "status": 200,
+    "headers": {
+      "Content-Type": "application/pdf"
+    },
+    "body": "file://./storage/data/report.pdf"
+  }
+}
+```
+
+**字符串格式 Body（兼容格式）：**
+
+```json
+{
+  "name": "string_body_example",
+  "request": {
+    "method": "POST",
+    "path": "/v1/api/test",
+    "body": "{\"username\":\"user001\",\"password\":\"password123\"}"
+  },
+  "response": {
+    "status": 200,
+    "body": "{\"success\": true}"
+  }
+}
 ```
 
 > `file://` 支持两种路径：