feat: 实现核心匹配引擎与请求处理器并修复解析逻辑

- 新增 router 模块：实现基于路径首段索引子集匹配。
- 新增 handler 模块：集成 Axum 处理器，支持 Smart Body 协议与延迟模拟。
- 修复解析与匹配故障：修正 YAML 字段类型解析错误。

tests/loader_test.rs

@@ -0,0 +1,114 @@
+use std::fs::{self, File};
+use std::io::Write;
+use tempfile::tempdir;
+// 假设你的项目名在 Cargo.toml 中叫 mock_server
+use mock_server::config::MockSource;
+use mock_server::loader::MockLoader;
+
+#[test]
+fn test_config_deserialization() {
+    // 测试 1：验证单接口 YAML 解析
+    let single_yaml = r#"
+        id: "auth_v1"
+        request:
+          method: "POST"
+          path: "/api/v1/login"
+        response:
+          status: 200
+          body: "inline_content"
+    "#;
+    let res: MockSource = serde_yaml::from_str(single_yaml).expect("应该成功解析单接口");
+    assert_eq!(res.flatten().len(), 1);
+    // assert_eq!(res.flatten()[0].id, "auth_v1");
+
+    // 测试 2：验证多接口 YAML 数组解析
+    let multi_yaml = r#"
+        - id: "api_1"
+          request: { method: "GET", path: "/1" }
+          response: { status: 200, body: "b1" }
+        - id: "api_2"
+          request: { method: "GET", path: "/2" }
+          response: { status: 200, body: "b2" }
+    "#;
+    let res_multi: MockSource = serde_yaml::from_str(multi_yaml).expect("应该成功解析接口数组");
+    assert_eq!(res_multi.flatten().len(), 2);
+}
+
+#[test]
+fn test_recursive_loading_logic() {
+    // 创建临时 Mock 目录结构
+    let root_dir = tempdir().expect("创建临时目录失败");
+    let root_path = root_dir.path();
+
+    // 构造物理层级：mocks/v1/user/
+    let user_dir = root_path.join("v1/user");
+    fs::create_dir_all(&user_dir).unwrap();
+
+    // 在深层目录创建单接口文件
+    let mut file1 = File::create(user_dir.join("get_profile.yaml")).unwrap();
+    writeln!(
+        file1,
+        r#"
+        id: "user_profile"
+        request:
+          method: "GET"
+          path: "/api/v1/user/profile"
+        response:
+          status: 200
+          body: "profile_data"
+    "#
+    )
+    .unwrap();
+
+    // 在根目录创建多接口文件
+    let mut file2 = File::create(root_path.join("system.yaml")).unwrap();
+    writeln!(
+        file2,
+        r#"
+        - id: "sys_health"
+          request: {{ method: "GET", path: "/health" }}
+          response: {{ status: 200, body: "ok" }}
+        - id: "sys_version"
+          request: {{ method: "GET", path: "/version" }}
+          response: {{ status: 200, body: "1.0.0" }}
+    "#
+    )
+    .unwrap();
+//     writeln!(
+//         file2,
+//         r#"
+// - id: "sys_health"
+//   request:
+//     method: "GET"
+//     path: "/health"
+//   response:
+//     status: 200
+//     body: "ok"
+// - id: "sys_version"
+//   request:
+//     method: "GET"
+//     path: "/version"
+//   response:
+//     status: 200
+//     body: "1.0.0"
+// "#
+//     )
+//     .unwrap();
+
+    // 执行加载
+    let index = MockLoader::load_all_from_dir(root_path);
+
+    // 断言结果：
+    // 1. 检查 Key 是否根据路径首段正确提取（/api/v1/... -> api, /health -> health）
+    assert!(index.contains_key("api"), "索引应包含 'api' 键");
+    assert!(index.contains_key("health"), "索引应包含 'health' 键");
+    assert!(index.contains_key("version"), "索引应包含 'version' 键");
+
+    // 2. 检查规则总数
+    let total_rules: usize = index.values().map(|v| v.len()).sum();
+    assert_eq!(total_rules, 3, "总规则数应为 3");
+
+    // 3. 检查深层文件是否被正确读取
+    let api_rules = &index["api"];
+    assert_eq!(api_rules[0].id, "user_profile");
+}