feat: worker 日志 CSV 导出 + 集群日志导出菜单完善

- handleAuditWorkerLogsCsv: 全环 fan-out 收集每节点 frpc 日志,
  逐行展开为 CSV (node/worker_key/remote/worker_state/log_line),
  Excel 可直接过滤/pivot 审计
- gatherClusterWorkerLogs: 提取 JSON 与 CSV 共用的日志聚合逻辑
- 路由: GET /audit/worker-logs.csv (read 级)
- ClusterView: 导出 worker 日志改下拉菜单 (JSON/CSV 两格式)
- api.ts: downloadAuditCsv 支持 worker-logs 类型
- gofmt: handlers_audit.go 格式对齐

internal/httpapi/handlers_logs.go

@@ -67,20 +67,13 @@ type clusterWorkerLogNode struct {
 	Logs  *nodeLogsResp `json:"logs,omitempty"`
 }
 
-// handleClusterLogsExport fans out GET /node/logs to every alive ring node
+// gatherClusterWorkerLogs fans out GET /node/logs to every alive ring node
 // (using the flag Basic creds, which resolve to admin on each peer via the
-// flag fast path) and aggregates the results into a downloadable bundle.
-// Unreachable nodes are marked error but don't abort the export. The
-// requester's own logs are gathered locally without an HTTP round-trip.
-func (h *Handler) handleClusterLogsExport(w http.ResponseWriter, r *http.Request) {
-	if r.Method != http.MethodGet {
-		methodNotAllowed(w)
-		return
-	}
-	if h.Ring == nil {
-		http.Error(w, "ring engine not enabled", http.StatusNotFound)
-		return
-	}
+// flag fast path) and aggregates the results. Unreachable nodes are marked
+// error but don't abort the export. The requester's own logs are gathered
+// locally without an HTTP round-trip. Shared by the JSON bundle and the CSV
+// audit export.
+func (h *Handler) gatherClusterWorkerLogs(r *http.Request) (string, []clusterWorkerLogNode) {
 	snap := h.Ring.Snapshot()
 	selfID := snap.SelfID
 	type target struct{ id, addr string }
@@ -139,6 +132,20 @@ func (h *Handler) handleClusterLogsExport(w http.ResponseWriter, r *http.Request
 		}(i, t)
 	}
 	wg.Wait()
+	return selfID, results
+}
+
+// handleClusterLogsExport serves the aggregated worker-log bundle as JSON.
+func (h *Handler) handleClusterLogsExport(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		methodNotAllowed(w)
+		return
+	}
+	if h.Ring == nil {
+		http.Error(w, "ring engine not enabled", http.StatusNotFound)
+		return
+	}
+	selfID, results := h.gatherClusterWorkerLogs(r)
 	bundle := map[string]any{
 		"_type":      "webui4frpc-worker-logs",
 		"version":    1,