feat: API 访问日志系统（拦截器 + 统计分析 + 管理页面）

- V6: api_access_logs 表（method/path/email/IP/status/耗时/错误）
- ApiLogInterceptor: 记录所有 /api/v1/** 请求，order(0) 最优先
- ApiLogController: 分页查询 + 按邮箱/路径统计（24h 窗口）
- 前端 ApiLogs.vue: 筛选/统计面板/日志列表/分页
- 导航新增「访问日志」菜单项

par-api/src/main/java/com/par/api/controller/ApiLogController.java

@@ -0,0 +1,62 @@
+package com.par.api.controller;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.par.core.dto.ApiResponse;
+import com.par.core.entity.ApiAccessLog;
+import com.par.core.mapper.ApiAccessLogMapper;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+import java.time.LocalDateTime;
+import java.util.Map;
+
+/**
+ * API 访问日志控制器
+ */
+@RestController
+@RequestMapping("/api/v1/admin/logs")
+@RequiredArgsConstructor
+public class ApiLogController {
+
+    private final ApiAccessLogMapper mapper;
+
+    @GetMapping
+    public ApiResponse<Map<String, Object>> list(
+            @RequestParam(defaultValue = "1") int page,
+            @RequestParam(defaultValue = "50") int size,
+            @RequestParam(required = false) String email,
+            @RequestParam(required = false) String path,
+            @RequestParam(required = false) Boolean success,
+            HttpServletRequest request) {
+        // checkAdmin implicitly via interceptor
+
+        LambdaQueryWrapper<ApiAccessLog> q = new LambdaQueryWrapper<>();
+        if (email != null && !email.isBlank()) q.like(ApiAccessLog::getEmail, email);
+        if (path != null && !path.isBlank()) q.like(ApiAccessLog::getPath, path);
+        if (success != null) q.eq(ApiAccessLog::getSuccess, success);
+        q.orderByDesc(ApiAccessLog::getCreatedAt);
+
+        Page<ApiAccessLog> p = mapper.selectPage(new Page<>(page, size), q);
+        Map<String, Object> result = Map.of(
+                "records", p.getRecords(),
+                "total", p.getTotal(),
+                "page", p.getCurrent(),
+                "size", p.getSize()
+        );
+        return ApiResponse.success(result);
+    }
+
+    @GetMapping("/stats/email")
+    public ApiResponse<Object> statsByEmail(@RequestParam(defaultValue = "24") int hours) {
+        String since = LocalDateTime.now().minusHours(hours).toString();
+        return ApiResponse.success(mapper.statsByEmail(since));
+    }
+
+    @GetMapping("/stats/path")
+    public ApiResponse<Object> statsByPath(@RequestParam(defaultValue = "24") int hours) {
+        String since = LocalDateTime.now().minusHours(hours).toString();
+        return ApiResponse.success(mapper.statsByPath(since));
+    }
+}