feat(access-logs): 重构访问日志为概览与明细双 Tab

新增访问日志概览 API 与前端页面：汇总请求量/访问量/带宽趋势与 Top 排行，
明细列表保留检索；排行榜改为紧凑列表样式。

internal/apps/openflare/observability/analytics.go

@@ -130,7 +130,6 @@ type diskCounterState struct {
 	seen  bool
 }
 
-
 func buildTrafficWindowSummaryFromAccessLogs(
 	ctx context.Context,
 	nodeID string,
@@ -333,7 +332,7 @@ func BuildTrafficTrendPointsFromAccessLogs(ctx context.Context, now time.Time, n
 		Since:       since,
 		Until:       now,
 		FoldMinutes: 60,
-		SortBy:      "logged_at",
+		SortBy:      defaultAccessLogSortBy,
 		SortOrder:   sortOrderAsc,
 	})
 	if err != nil || len(buckets) == 0 {
@@ -379,7 +378,7 @@ func applyAccessLogBytesToNetworkTrend(ctx context.Context, now time.Time, nodeI
 		Since:       since,
 		Until:       now,
 		FoldMinutes: 60,
-		SortBy:      "logged_at",
+		SortBy:      defaultAccessLogSortBy,
 		SortOrder:   sortOrderAsc,
 	})
 	if err != nil || len(buckets) == 0 {