✨ feat(status): 新增请求日志并重设计状态页

- 新增 server.request_log 配置:记录业务请求元数据(IP/方法/路径/状态/耗时,
  key 自动脱敏)与 4xx/5xx 错误摘要(前 4KB),按保留天数自动清理
- 移除 /self-info 与 /vacuum 接口及相关文档
- 状态页重设计:毛玻璃卡片+吸顶玻璃栏、服务状态条、KPI 卡与请求分类
  条形图、可折叠 API 文档分组、行内测试面板;深浅色分别调校,
  含 reduced-motion / reduced-transparency / 无 backdrop-filter 兜底

internal/handlers/common.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"regexp"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -212,6 +213,60 @@ func OptionalAccessKey(handler http.HandlerFunc) http.HandlerFunc {
 	return RequireAccessKey(handler)
 }
 
+// statusWriter 捕获状态码；status>=400 时截断留存响应体前 ErrMsgMax 字节用于排障
+type statusWriter struct {
+	http.ResponseWriter
+	status int
+	errBuf []byte
+}
+
+func (w *statusWriter) WriteHeader(code int) {
+	w.status = code
+	w.ResponseWriter.WriteHeader(code)
+}
+
+func (w *statusWriter) Write(p []byte) (int, error) {
+	if w.status >= 400 && len(w.errBuf) < fqapi.ErrMsgMax {
+		n := min(len(p), fqapi.ErrMsgMax-len(w.errBuf))
+		w.errBuf = append(w.errBuf, p[:n]...)
+	}
+	return w.ResponseWriter.Write(p)
+}
+
+// LogRequestMiddleware 异步记录请求元数据（时间/IP/方法/路径/状态/耗时）到数据库
+// ponytail: 配置启动时读取一次，热更新不生效；未启用时零开销直通
+func LogRequestMiddleware(handler http.HandlerFunc) http.HandlerFunc {
+	cfg := config.GetAppConfig()
+	if cfg == nil || !cfg.Server.RequestLog.Enabled {
+		return handler
+	}
+	return func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		sw := &statusWriter{ResponseWriter: w, status: http.StatusOK}
+		handler(sw, r)
+
+		query := sanitizeQuery(r.URL.RawQuery)
+		fqapi.LogRequest(fqapi.RequestLogEntry{
+			Ts:         start.Unix(),
+			IP:         clientIP(r),
+			Method:     r.Method,
+			Path:       r.URL.Path,
+			Query:      query,
+			Status:     sw.status,
+			DurationMs: time.Since(start).Milliseconds(),
+			ErrorMsg:   string(sw.errBuf),
+		})
+	}
+}
+
+// keyParamRe 匹配查询串中独立的 key 参数（accesskey 等不会被误伤）
+var keyParamRe = regexp.MustCompile(`(?i)(^|&)key=[^&]*`)
+
+// sanitizeQuery 日志中脱敏：key 参数值替换为 ***（直接替换避免 Encode 把 *** 转义）
+func sanitizeQuery(rawQuery string) string {
+	return keyParamRe.ReplaceAllString(rawQuery, "${1}key=***")
+}
+
 // HandleHealth 存活探针（供容器/反向代理使用）
 func HandleHealth(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, "ok")
@@ -227,22 +282,3 @@ func HandleMain(w http.ResponseWriter, r *http.Request) {
 	}
 	json.NewEncoder(w).Encode(response)
 }
-
-// HandleSelfInfo 设备信息处理
-func HandleSelfInfo(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/json; charset=utf-8")
-
-	// 获取设备池统计信息
-	pool := fqapi.GetDeviceKeyPool()
-	poolStats := pool.GetStats()
-
-	response := map[string]interface{}{
-		"code":    0,
-		"message": "SUCCESS",
-		"data": map[string]interface{}{
-			"device_pool_enabled": pool.IsEnabled(),
-			"device_pool_stats":   poolStats,
-		},
-	}
-	json.NewEncoder(w).Encode(response)
-}