task-47: 轮询 baseline 统计补强测试

frontend-vue/src/shared/composables/useTaskProgressLoop.ts

@@ -194,6 +194,7 @@ export function useTaskProgressLoop<TDetail>(
     try {
       const result = await options.fetchProgress(ids)
       const items = result?.items || []
+      baseline?.recordResponseItems(items, (detail) => options.extractTaskId(detail))
       const terminalEvents: Array<{ taskId: number; detail: TDetail | undefined; status: string }> = []
       const nextStatuses = { ...taskStatuses.value }
       for (const detail of items) {
@@ -226,6 +227,7 @@ export function useTaskProgressLoop<TDetail>(
       }
     } catch (error) {
       if (!disposed) {
+        baseline?.recordFailure()
         const attempt = failureCount
         failureCount = Math.min(failureCount + 1, 100)
         options.onError?.(error, attempt)

frontend-vue/src/shared/task-polling-baseline.ts

@@ -32,6 +32,8 @@ export interface TaskPollingBaselineStats {
   droppedCount: number
   /** 缓存条目 key（按首次到达顺序） */
   entryKeys: number[]
+  /** 轮询失败次数（网络错误等，不触发终态） */
+  failureCount: number
 }
 
 /** 每条缓存条目的固定估算开销：key + 记录结构 + 文本编码余量 */
@@ -56,6 +58,7 @@ export function createTaskPollingBaseline(options: TaskPollingBaselineOptions =
   let largestResponseBytes = 0
   let cachedBytes = 0
   let droppedCount = 0
+  let failureCount = 0
 
   function evictIfNeeded() {
     while (cache.size > maxEntries || cachedBytes > maxCacheBytes) {
@@ -72,6 +75,11 @@ export function createTaskPollingBaseline(options: TaskPollingBaselineOptions =
     requestCount += 1
   }
 
+  /** 记录一次轮询失败（网络错误/超时等，不影响缓存） */
+  function recordFailure() {
+    failureCount += 1
+  }
+
   /**
    * 记录一次批量进度响应，返回成功写入缓存的条目数。
    * items 非数组、extractKey 非函数或 key 提取抛错时整个调用失败，不产生任何状态变更。
@@ -125,6 +133,7 @@ export function createTaskPollingBaseline(options: TaskPollingBaselineOptions =
     largestResponseBytes = 0
     cachedBytes = 0
     droppedCount = 0
+    failureCount = 0
   }
 
   function stats(): TaskPollingBaselineStats {
@@ -136,10 +145,11 @@ export function createTaskPollingBaseline(options: TaskPollingBaselineOptions =
       cachedBytes,
       droppedCount,
       entryKeys: [...cache.keys()],
+      failureCount,
     }
   }
 
-  return { recordRequest, recordResponseItems, reset, stats }
+  return { recordRequest, recordResponseItems, recordFailure, reset, stats }
 }
 
 export type TaskPollingBaseline = ReturnType<typeof createTaskPollingBaseline>