feat(usage): 活跃请求轮询增加缓存与成本字段

- 后端 getActiveRequests 返回新增 cache_creation/read_input_tokens、actual_cost、rate_multiplier
- 前端轮询时同步更新这些字段到记录中
- 优化刷新逻辑：全局刷新开启时停止1秒轮询，关闭时恢复

frontend/src/api/me.ts

@@ -212,7 +212,11 @@ export const meApi = {
       status: 'pending' | 'streaming' | 'completed' | 'failed'
       input_tokens: number
       output_tokens: number
+      cache_creation_input_tokens?: number | null
+      cache_read_input_tokens?: number | null
       cost: number
+      actual_cost?: number | null
+      rate_multiplier?: number | null
       response_time_ms: number | null
       first_byte_time_ms: number | null
     }>

frontend/src/api/usage.ts

@@ -192,7 +192,11 @@ export const usageApi = {
       status: 'pending' | 'streaming' | 'completed' | 'failed'
       input_tokens: number
       output_tokens: number
+      cache_creation_input_tokens?: number | null
+      cache_read_input_tokens?: number | null
       cost: number
+      actual_cost?: number | null
+      rate_multiplier?: number | null
       response_time_ms: number | null
       first_byte_time_ms: number | null
       provider?: string | null

frontend/src/views/shared/Usage.vue

@@ -283,7 +283,11 @@ async function pollActiveRequests() {
       // 进行中状态也需要持续更新（provider/key/TTFB 可能在 streaming 后才落库）
       record.input_tokens = update.input_tokens
       record.output_tokens = update.output_tokens
+      record.cache_creation_input_tokens = update.cache_creation_input_tokens ?? undefined
+      record.cache_read_input_tokens = update.cache_read_input_tokens ?? undefined
       record.cost = update.cost
+      record.actual_cost = update.actual_cost ?? undefined
+      record.rate_multiplier = update.rate_multiplier ?? undefined
       record.response_time_ms = update.response_time_ms ?? undefined
       record.first_byte_time_ms = update.first_byte_time_ms ?? undefined
       // 管理员接口返回额外字段
@@ -318,8 +322,9 @@ function stopAutoRefresh() {
 }
 
 // 监听活跃请求状态，自动启动/停止刷新
+// 注意：全局刷新开启时不需要1秒轮询（全局刷新已经包含完整数据刷新）
 watch(hasActiveRequests, (hasActive) => {
-  if (hasActive) {
+  if (hasActive && !globalAutoRefresh.value) {
     startAutoRefresh()
   } else {
     stopAutoRefresh()
@@ -344,10 +349,16 @@ function stopGlobalAutoRefresh() {
 function handleAutoRefreshChange(value: boolean) {
   globalAutoRefresh.value = value
   if (value) {
+    // 开启全局刷新时，停止1秒轮询（避免重复请求）
+    stopAutoRefresh()
     refreshData() // 立即刷新一次
     startGlobalAutoRefresh()
   } else {
     stopGlobalAutoRefresh()
+    // 关闭全局刷新后，如果有活跃请求，恢复1秒轮询
+    if (hasActiveRequests.value) {
+      startAutoRefresh()
+    }
   }
 }
 

src/services/usage/service.py

@@ -1713,7 +1713,11 @@ class UsageService:
             Usage.status,
             Usage.input_tokens,
             Usage.output_tokens,
+            Usage.cache_creation_input_tokens,
+            Usage.cache_read_input_tokens,
             Usage.total_cost_usd,
+            Usage.actual_total_cost_usd,
+            Usage.rate_multiplier,
             Usage.response_time_ms,
             Usage.first_byte_time_ms,  # 首字时间 (TTFB)
             Usage.created_at,
@@ -1773,7 +1777,11 @@ class UsageService:
                 "status": "failed" if r.id in timeout_ids else r.status,
                 "input_tokens": r.input_tokens,
                 "output_tokens": r.output_tokens,
+                "cache_creation_input_tokens": r.cache_creation_input_tokens,
+                "cache_read_input_tokens": r.cache_read_input_tokens,
                 "cost": float(r.total_cost_usd) if r.total_cost_usd else 0,
+                "actual_cost": float(r.actual_total_cost_usd) if r.actual_total_cost_usd else None,
+                "rate_multiplier": float(r.rate_multiplier) if r.rate_multiplier else None,
                 "response_time_ms": r.response_time_ms,
                 "first_byte_time_ms": r.first_byte_time_ms,  # 首字时间 (TTFB)
             }