refactor: extract CapacityBadge component from AccountCapacityCell

Extract repeated badge template (SVG icon + current/max display) into
a reusable CapacityBadge component. Reduces AccountCapacityCell from
~300 lines to ~180 lines with identical behavior.

frontend/src/components/account/AccountCapacityCell.vue

 <template>
-  <div class="flex flex-col gap-1.5">
+  <div class="flex flex-col gap-0.5">
     <!-- 并发槽位 -->
-    <div class="flex items-center gap-1.5">
-      <span
-        :class="[
-          'inline-flex items-center gap-1 rounded-md px-2 py-0.5 text-xs font-medium',
-          concurrencyClass
-        ]"
-      >
-        <svg class="h-3 w-3" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+    <CapacityBadge :color-class="concurrencyClass" :current="currentConcurrency" :max="account.concurrency">
+      <svg class="h-2.5 w-2.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
         <path stroke-linecap="round" stroke-linejoin="round" d="M3.75 6A2.25 2.25 0 016 3.75h2.25A2.25 2.25 0 0110.5 6v2.25a2.25 2.25 0 01-2.25 2.25H6a2.25 2.25 0 01-2.25-2.25V6zM3.75 15.75A2.25 2.25 0 016 13.5h2.25a2.25 2.25 0 012.25 2.25V18a2.25 2.25 0 01-2.25 2.25H6A2.25 2.25 0 013.75 18v-2.25zM13.5 6a2.25 2.25 0 012.25-2.25H18A2.25 2.25 0 0120.25 6v2.25A2.25 2.25 0 0118 10.5h-2.25a2.25 2.25 0 01-2.25-2.25V6zM13.5 15.75a2.25 2.25 0 012.25-2.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-2.25A2.25 2.25 0 0113.5 18v-2.25z" />
       </svg>
-        <span class="font-mono">{{ currentConcurrency }}</span>
-        <span class="text-gray-400 dark:text-gray-500">/</span>
-        <span class="font-mono">{{ account.concurrency }}</span>
-      </span>
-    </div>
+    </CapacityBadge>
 
-    <!-- 5h窗口费用限制（仅 Anthropic OAuth/SetupToken 且启用时显示） -->
-    <div v-if="showWindowCost" class="flex items-center gap-1">
-      <span
-        :class="[
-          'inline-flex items-center gap-1 rounded-md px-1.5 py-0.5 text-[10px] font-medium',
-          windowCostClass
-        ]"
-        :title="windowCostTooltip"
-      >
+    <!-- 5h窗口费用限制 -->
+    <CapacityBadge v-if="showWindowCost" :color-class="windowCostClass" :tooltip="windowCostTooltip" :current="'$' + formatCost(currentWindowCost)" :max="'$' + formatCost(account.window_cost_limit)">
       <svg class="h-2.5 w-2.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
         <path stroke-linecap="round" stroke-linejoin="round" d="M12 6v12m-3-2.818l.879.659c1.171.879 3.07.879 4.242 0 1.172-.879 1.172-2.303 0-3.182C13.536 12.219 12.768 12 12 12c-.725 0-1.45-.22-2.003-.659-1.106-.879-1.106-2.303 0-3.182s2.9-.879 4.006 0l.415.33M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
       </svg>
-        <span class="font-mono">${{ formatCost(currentWindowCost) }}</span>
-        <span class="text-gray-400 dark:text-gray-500">/</span>
-        <span class="font-mono">${{ formatCost(account.window_cost_limit) }}</span>
-      </span>
-    </div>
+    </CapacityBadge>
 
-    <!-- 会话数量限制（仅 Anthropic OAuth/SetupToken 且启用时显示） -->
-    <div v-if="showSessionLimit" class="flex items-center gap-1">
-      <span
-        :class="[
-          'inline-flex items-center gap-1 rounded-md px-1.5 py-0.5 text-[10px] font-medium',
-          sessionLimitClass
-        ]"
-        :title="sessionLimitTooltip"
-      >
+    <!-- 会话数量限制 -->
+    <CapacityBadge v-if="showSessionLimit" :color-class="sessionLimitClass" :tooltip="sessionLimitTooltip" :current="activeSessions" :max="account.max_sessions!">
       <svg class="h-2.5 w-2.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
         <path stroke-linecap="round" stroke-linejoin="round" d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z" />
       </svg>
-        <span class="font-mono">{{ activeSessions }}</span>
-        <span class="text-gray-400 dark:text-gray-500">/</span>
-        <span class="font-mono">{{ account.max_sessions }}</span>
-      </span>
-    </div>
+    </CapacityBadge>
 
-    <!-- RPM 限制（仅 Anthropic OAuth/SetupToken 且启用时显示） -->
-    <div v-if="showRpmLimit" class="flex items-center gap-1">
-      <span
-        :class="[
-          'inline-flex items-center gap-1 rounded-md px-1.5 py-0.5 text-[10px] font-medium',
-          rpmClass
-        ]"
-        :title="rpmTooltip"
-      >
+    <!-- RPM 限制 -->
+    <CapacityBadge v-if="showRpmLimit" :color-class="rpmClass" :tooltip="rpmTooltip" :current="currentRPM" :max="account.base_rpm!" :suffix="rpmStrategyTag">
       <svg class="h-2.5 w-2.5" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor">
         <path stroke-linecap="round" stroke-linejoin="round" d="M12 6v6h4.5m4.5 0a9 9 0 1 1-18 0 9 9 0 0 1 18 0Z" />
       </svg>
-        <span class="font-mono">{{ currentRPM }}</span>
-        <span class="text-gray-400 dark:text-gray-500">/</span>
-        <span class="font-mono">{{ account.base_rpm }}</span>
-        <span class="text-[9px] opacity-60">{{ rpmStrategyTag }}</span>
-      </span>
-    </div>
+    </CapacityBadge>
 
     <!-- API Key 账号配额限制 -->
     <QuotaBadge v-if="showDailyQuota" :used="account.quota_daily_used ?? 0" :limit="account.quota_daily_limit!" label="D" />
@@ -83,7 +39,8 @@
 import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import type { Account } from '@/types'
-import QuotaBadge from './QuotaBadge.vue'
+import CapacityBadge from '@/components/account/CapacityBadge.vue'
+import QuotaBadge from '@/components/account/QuotaBadge.vue'
 
 const props = defineProps<{
   account: Account
@@ -91,225 +48,143 @@ const props = defineProps<{
 
 const { t } = useI18n()
 
-// 当前并发数
+// ====== 并发 ======
 const currentConcurrency = computed(() => props.account.current_concurrency || 0)
 
-// 是否为 Anthropic OAuth/SetupToken 账号
-const isAnthropicOAuthOrSetupToken = computed(() => {
-  return (
+const concurrencyClass = computed(() => {
+  const current = currentConcurrency.value
+  const max = props.account.concurrency
+  if (current >= max) return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
+  if (current > 0) return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
+  return 'bg-gray-100 text-gray-600 dark:bg-gray-800 dark:text-gray-400'
+})
+
+// ====== 窗口费用 ======
+const isAnthropicOAuthOrSetupToken = computed(() =>
   props.account.platform === 'anthropic' &&
   (props.account.type === 'oauth' || props.account.type === 'setup-token')
-  )
-})
+)
 
-// 是否显示窗口费用限制
-const showWindowCost = computed(() => {
-  return (
+const showWindowCost = computed(() =>
   isAnthropicOAuthOrSetupToken.value &&
-    props.account.window_cost_limit !== undefined &&
-    props.account.window_cost_limit !== null &&
+  props.account.window_cost_limit != null &&
   props.account.window_cost_limit > 0
-  )
-})
+)
 
-// 当前窗口费用
 const currentWindowCost = computed(() => props.account.current_window_cost ?? 0)
 
-// 是否显示会话限制
-const showSessionLimit = computed(() => {
-  return (
-    isAnthropicOAuthOrSetupToken.value &&
-    props.account.max_sessions !== undefined &&
-    props.account.max_sessions !== null &&
-    props.account.max_sessions > 0
-  )
-})
-
-// 当前活跃会话数
-const activeSessions = computed(() => props.account.active_sessions ?? 0)
-
-// 并发状态样式
-const concurrencyClass = computed(() => {
-  const current = currentConcurrency.value
-  const max = props.account.concurrency
-
-  if (current >= max) {
-    return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
-  }
-  if (current > 0) {
-    return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
-  }
-  return 'bg-gray-100 text-gray-600 dark:bg-gray-800 dark:text-gray-400'
-})
-
-// 窗口费用状态样式
 const windowCostClass = computed(() => {
   if (!showWindowCost.value) return ''
-
   const current = currentWindowCost.value
   const limit = props.account.window_cost_limit || 0
   const reserve = props.account.window_cost_sticky_reserve || 10
-
-  if (current >= limit + reserve) {
-    return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
-  }
-  if (current >= limit) {
-    return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
-  }
-  if (current >= limit * 0.8) {
-    return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
-  }
+  if (current >= limit + reserve) return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
+  if (current >= limit) return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
+  if (current >= limit * 0.8) return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
   return 'bg-emerald-100 text-emerald-700 dark:bg-emerald-900/30 dark:text-emerald-400'
 })
 
-// 窗口费用提示文字
 const windowCostTooltip = computed(() => {
   if (!showWindowCost.value) return ''
-
   const current = currentWindowCost.value
   const limit = props.account.window_cost_limit || 0
   const reserve = props.account.window_cost_sticky_reserve || 10
-
-  if (current >= limit + reserve) {
-    return t('admin.accounts.capacity.windowCost.blocked')
-  }
-  if (current >= limit) {
-    return t('admin.accounts.capacity.windowCost.stickyOnly')
-  }
+  if (current >= limit + reserve) return t('admin.accounts.capacity.windowCost.blocked')
+  if (current >= limit) return t('admin.accounts.capacity.windowCost.stickyOnly')
   return t('admin.accounts.capacity.windowCost.normal')
 })
 
-// 会话限制状态样式
+// ====== 会话限制 ======
+const showSessionLimit = computed(() =>
+  isAnthropicOAuthOrSetupToken.value &&
+  props.account.max_sessions != null &&
+  props.account.max_sessions > 0
+)
+
+const activeSessions = computed(() => props.account.active_sessions ?? 0)
+
 const sessionLimitClass = computed(() => {
   if (!showSessionLimit.value) return ''
-
   const current = activeSessions.value
   const max = props.account.max_sessions || 0
-
-  if (current >= max) {
-    return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
-  }
-  if (current >= max * 0.8) {
-    return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
-  }
+  if (current >= max) return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
+  if (current >= max * 0.8) return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
   return 'bg-emerald-100 text-emerald-700 dark:bg-emerald-900/30 dark:text-emerald-400'
 })
 
-// 会话限制提示文字
 const sessionLimitTooltip = computed(() => {
   if (!showSessionLimit.value) return ''
-
   const current = activeSessions.value
   const max = props.account.max_sessions || 0
   const idle = props.account.session_idle_timeout_minutes || 5
-
-  if (current >= max) {
-    return t('admin.accounts.capacity.sessions.full', { idle })
-  }
+  if (current >= max) return t('admin.accounts.capacity.sessions.full', { idle })
   return t('admin.accounts.capacity.sessions.normal', { idle })
 })
 
-// 是否显示 RPM 限制
-const showRpmLimit = computed(() => {
-  return (
+// ====== RPM ======
+const showRpmLimit = computed(() =>
   isAnthropicOAuthOrSetupToken.value &&
-    props.account.base_rpm !== undefined &&
-    props.account.base_rpm !== null &&
+  props.account.base_rpm != null &&
   props.account.base_rpm > 0
-  )
-})
+)
 
-// 当前 RPM 计数
 const currentRPM = computed(() => props.account.current_rpm ?? 0)
-
-// RPM 策略
 const rpmStrategy = computed(() => props.account.rpm_strategy || 'tiered')
+const rpmStrategyTag = computed(() => rpmStrategy.value === 'sticky_exempt' ? '[S]' : '[T]')
 
-// RPM 策略标签
-const rpmStrategyTag = computed(() => {
-  return rpmStrategy.value === 'sticky_exempt' ? '[S]' : '[T]'
-})
-
-// RPM buffer 计算（与后端一致：base <= 0 时 buffer 为 0）
 const rpmBuffer = computed(() => {
   const base = props.account.base_rpm || 0
   return props.account.rpm_sticky_buffer ?? (base > 0 ? Math.max(1, Math.floor(base / 5)) : 0)
 })
 
-// RPM 状态样式
 const rpmClass = computed(() => {
   if (!showRpmLimit.value) return ''
-
   const current = currentRPM.value
   const base = props.account.base_rpm ?? 0
   const buffer = rpmBuffer.value
-
   if (rpmStrategy.value === 'tiered') {
-    if (current >= base + buffer) {
-      return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
-    }
-    if (current >= base) {
-      return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
-    }
+    if (current >= base + buffer) return 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
+    if (current >= base) return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
   } else {
-    if (current >= base) {
-      return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
-    }
-  }
-  if (current >= base * 0.8) {
-    return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
+    if (current >= base) return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'
   }
+  if (current >= base * 0.8) return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400'
   return 'bg-emerald-100 text-emerald-700 dark:bg-emerald-900/30 dark:text-emerald-400'
 })
 
-// RPM 提示文字（增强版：显示策略、区域、缓冲区）
 const rpmTooltip = computed(() => {
   if (!showRpmLimit.value) return ''
-
   const current = currentRPM.value
   const base = props.account.base_rpm ?? 0
   const buffer = rpmBuffer.value
-
   if (rpmStrategy.value === 'tiered') {
-    if (current >= base + buffer) {
-      return t('admin.accounts.capacity.rpm.tieredBlocked', { buffer })
-    }
-    if (current >= base) {
-      return t('admin.accounts.capacity.rpm.tieredStickyOnly', { buffer })
-    }
-    if (current >= base * 0.8) {
-      return t('admin.accounts.capacity.rpm.tieredWarning')
-    }
+    if (current >= base + buffer) return t('admin.accounts.capacity.rpm.tieredBlocked', { buffer })
+    if (current >= base) return t('admin.accounts.capacity.rpm.tieredStickyOnly', { buffer })
+    if (current >= base * 0.8) return t('admin.accounts.capacity.rpm.tieredWarning')
     return t('admin.accounts.capacity.rpm.tieredNormal')
   } else {
-    if (current >= base) {
-      return t('admin.accounts.capacity.rpm.stickyExemptOver')
-    }
-    if (current >= base * 0.8) {
-      return t('admin.accounts.capacity.rpm.stickyExemptWarning')
-    }
+    if (current >= base) return t('admin.accounts.capacity.rpm.stickyExemptOver')
+    if (current >= base * 0.8) return t('admin.accounts.capacity.rpm.stickyExemptWarning')
     return t('admin.accounts.capacity.rpm.stickyExemptNormal')
   }
 })
 
-// 是否显示各维度配额（apikey / bedrock 类型）
-const isQuotaEligible = computed(() => props.account.type === 'apikey' || props.account.type === 'bedrock')
-
-const showDailyQuota = computed(() => {
-  return isQuotaEligible.value && (props.account.quota_daily_limit ?? 0) > 0
-})
-
-const showWeeklyQuota = computed(() => {
-  return isQuotaEligible.value && (props.account.quota_weekly_limit ?? 0) > 0
-})
-
-const showTotalQuota = computed(() => {
-  return isQuotaEligible.value && (props.account.quota_limit ?? 0) > 0
-})
-
 // 格式化费用显示
 const formatCost = (value: number | null | undefined) => {
   if (value === null || value === undefined) return '0'
   return value.toFixed(2)
 }
+
+// ====== 配额 ======
+const isQuotaEligible = computed(() => props.account.type === 'apikey' || props.account.type === 'bedrock')
+
+const showDailyQuota = computed(() =>
+  isQuotaEligible.value && props.account.quota_daily_limit != null && props.account.quota_daily_limit > 0
+)
+const showWeeklyQuota = computed(() =>
+  isQuotaEligible.value && props.account.quota_weekly_limit != null && props.account.quota_weekly_limit > 0
+)
+const showTotalQuota = computed(() =>
+  isQuotaEligible.value && props.account.quota_limit != null && props.account.quota_limit > 0
+)
 </script>

frontend/src/components/account/CapacityBadge.vue

+<script setup lang="ts">
+defineProps<{
+  colorClass: string
+  tooltip?: string
+  current: string | number
+  max: string | number
+  suffix?: string
+}>()
+</script>
+
+<template>
+  <span
+    :class="[
+      'inline-flex items-center gap-1 rounded-md px-1.5 py-px text-[10px] font-medium leading-tight',
+      colorClass
+    ]"
+    :title="tooltip"
+  >
+    <slot />
+    <span class="font-mono">{{ current }}</span>
+    <span class="text-gray-400 dark:text-gray-500">/</span>
+    <span class="font-mono">{{ max }}</span>
+    <span v-if="suffix" class="text-[9px] opacity-60">{{ suffix }}</span>
+  </span>
+</template>