perf: Redis 操作优化，移除号池 key 列表的 Usage 聚合查询

- 号池 key 列表移除 Usage 表聚合查询(total_tokens/total_cost_usd)，消除慢 SQL
- cooldown 计数从 SCAN 改为 SCARD (O(1))，通过 cooldown_idx SET 维护索引
- 读路径 Lua 脚本移除 ZREMRANGEBYSCORE，清理移至写路径减少开销
- affinity 清理从 KEYS 改为 SCAN 分批删除，invalidate_all_for_provider 改用 pipeline 批量 MGET+UNLINK
- 缓存监控页添加清除按钮 loading 状态，Redis SCAN 并发限制为 4
- 提取 redis_utils 模块统一 SCAN+批量删除逻辑
- 调度热路径跳过 cooldown TTL 查询，account_state 预计算移出循环

frontend/src/api/endpoints/pool.ts

@@ -125,8 +125,6 @@ export interface PoolKeyDetail {
   cost_window_usage: number
   cost_limit: number | null
   request_count: number
-  total_tokens: number
-  total_cost_usd: number
   sticky_sessions: number
   lru_score: number | null
   created_at: string | null

frontend/src/views/admin/CacheMonitoring.vue

@@ -44,6 +44,7 @@ const listLoading = ref(false)
 const tableKeyword = ref('')
 const matchedUserId = ref<string | null>(null)
 const clearingRowAffinityKey = ref<string | null>(null)
+const clearingAllAffinity = ref(false)
 const currentPage = ref(1)
 const pageSize = ref(20)
 const currentTime = ref(Math.floor(Date.now() / 1000))
@@ -203,6 +204,7 @@ async function clearAllCache() {
   })
   if (!secondConfirm) return
 
+  clearingAllAffinity.value = true
   try {
     await cacheApi.clearAllCache()
     showSuccess('已清除所有缓存')
@@ -211,6 +213,8 @@ async function clearAllCache() {
   } catch (error) {
     showError('清除失败')
     log.error('清除所有缓存失败', error)
+  } finally {
+    clearingAllAffinity.value = false
   }
 }
 
@@ -571,6 +575,7 @@ onBeforeUnmount(() => {
               variant="ghost"
               size="icon"
               class="h-8 w-8 text-muted-foreground/70 hover:text-destructive"
+              :disabled="clearingAllAffinity"
               title="清除全部缓存"
               @click="clearAllCache"
             >

frontend/src/views/admin/PoolManagement.vue

@@ -543,25 +543,13 @@
                   >-</span>
                 </TableCell>
                 <TableCell class="py-3 px-2 align-middle">
-                  <div class="grid grid-rows-3 gap-0.5 w-[136px] mx-auto text-[10px] leading-4">
+                  <div class="w-[136px] mx-auto text-[10px] leading-4">
                     <div class="flex items-center justify-between gap-2">
                       <span class="text-muted-foreground">请求</span>
                       <span class="tabular-nums text-foreground/90">
                         {{ formatStatInteger(key.request_count) }}
                       </span>
                     </div>
-                    <div class="flex items-center justify-between gap-2">
-                      <span class="text-muted-foreground">Token</span>
-                      <span class="tabular-nums text-foreground/90">
-                        {{ formatTokenCount(key.total_tokens) }}
-                      </span>
-                    </div>
-                    <div class="flex items-center justify-between gap-2">
-                      <span class="text-muted-foreground">费用</span>
-                      <span class="tabular-nums text-foreground/90">
-                        {{ formatStatUsd(key.total_cost_usd) }}
-                      </span>
-                    </div>
                   </div>
                 </TableCell>
                 <TableCell class="py-3 text-center">
@@ -924,19 +912,11 @@
                 <div class="text-muted-foreground mb-0.5">
                   统计
                 </div>
-                <div class="space-y-0.5 text-[10px]">
+                <div class="text-[10px]">
                   <div class="flex items-center justify-between gap-2">
                     <span class="text-muted-foreground">请求</span>
                     <span class="tabular-nums">{{ formatStatInteger(key.request_count) }}</span>
                   </div>
-                  <div class="flex items-center justify-between gap-2">
-                    <span class="text-muted-foreground">Token</span>
-                    <span class="tabular-nums">{{ formatTokenCount(key.total_tokens) }}</span>
-                  </div>
-                  <div class="flex items-center justify-between gap-2">
-                    <span class="text-muted-foreground">费用</span>
-                    <span class="tabular-nums">{{ formatStatUsd(key.total_cost_usd) }}</span>
-                  </div>
                 </div>
               </div>
               <div
@@ -2509,23 +2489,6 @@ function formatStatInteger(value: number | null | undefined): string {
   return Math.round(n).toLocaleString('en-US')
 }
 
-function formatTokenCount(value: number | null | undefined): string {
-  const n = Number(value ?? 0)
-  if (!Number.isFinite(n) || n <= 0) return '0'
-  if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)}M`
-  if (n >= 1_000) return `${(n / 1_000).toFixed(1)}K`
-  return String(Math.round(n))
-}
-
-function formatStatUsd(value: number | null | undefined): string {
-  const n = Number(value ?? 0)
-  if (!Number.isFinite(n) || n <= 0) return '$0.00'
-  if (n < 0.01) return `$${n.toFixed(4)}`
-  if (n < 1) return `$${n.toFixed(3)}`
-  if (n < 1000) return `$${n.toFixed(2)}`
-  return `$${n.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`
-}
-
 function formatRelativeTime(isoStr: string): string {
   const date = new Date(isoStr)
   const pad = (n: number) => String(n).padStart(2, '0')