feat(ops): 看板上应用指标阈值显示

- 在OpsDashboard中加载阈值配置
- 在OpsDashboardHeader中根据阈值判断指标是否超标
- 超出阈值的指标显示为红色（SLA低于阈值也显示红色）
- 用Icon组件替换emoji表情

frontend/src/views/admin/ops/OpsDashboard.vue

@@ -24,6 +24,7 @@
         :query-mode="queryMode"
         :loading="loading"
         :last-updated="lastUpdated"
+        :thresholds="metricThresholds"
         @update:time-range="onTimeRangeChange"
         @update:platform="onPlatformChange"
         @update:group="onGroupChange"
@@ -75,7 +76,7 @@
       <OpsAlertEventsCard v-if="opsEnabled && !(loading && !hasLoadedOnce)" />
 
       <!-- Settings Dialog -->
-      <OpsSettingsDialog :show="showSettingsDialog" @close="showSettingsDialog = false" @saved="fetchData" />
+      <OpsSettingsDialog :show="showSettingsDialog" @close="showSettingsDialog = false" @saved="onSettingsSaved" />
 
       <!-- Alert Rules Dialog -->
       <BaseDialog :show="showAlertRulesCard" :title="t('admin.ops.alertRules.title')" width="extra-wide" @close="showAlertRulesCard = false">
@@ -121,7 +122,8 @@ import {
   type OpsErrorDistributionResponse,
   type OpsErrorTrendResponse,
   type OpsLatencyHistogramResponse,
-  type OpsThroughputTrendResponse
+  type OpsThroughputTrendResponse,
+  type OpsMetricThresholds
 } from '@/api/admin/ops'
 import { useAdminSettingsStore, useAppStore } from '@/stores'
 import OpsDashboardHeader from './components/OpsDashboardHeader.vue'
@@ -314,6 +316,7 @@ const syncQueryToRoute = useDebounceFn(async () => {
 }, 250)
 
 const overview = ref<OpsDashboardOverview | null>(null)
+const metricThresholds = ref<OpsMetricThresholds | null>(null)
 
 const throughputTrend = ref<OpsThroughputTrendResponse | null>(null)
 const loadingTrend = ref(false)
@@ -376,6 +379,11 @@ function onTimeRangeChange(v: string | number | boolean | null) {
   timeRange.value = v as TimeRange
 }
 
+function onSettingsSaved() {
+  loadThresholds()
+  fetchData()
+}
+
 function onPlatformChange(v: string | number | boolean | null) {
   platform.value = typeof v === 'string' ? v : ''
 }
@@ -615,6 +623,9 @@ onMounted(async () => {
     return
   }
 
+  // Load thresholds configuration
+  loadThresholds()
+
   if (adminSettingsStore.opsRealtimeMonitoringEnabled) {
     startQPSSubscription()
   } else {
@@ -626,6 +637,16 @@ onMounted(async () => {
   }
 })
 
+async function loadThresholds() {
+  try {
+    const settings = await opsAPI.getAlertRuntimeSettings()
+    metricThresholds.value = settings.thresholds || null
+  } catch (err) {
+    console.warn('[OpsDashboard] Failed to load thresholds', err)
+    metricThresholds.value = null
+  }
+}
+
 onUnmounted(() => {
   stopQPSSubscription()
   abortDashboardFetch()

frontend/src/views/admin/ops/components/OpsDashboardHeader.vue

@@ -4,8 +4,9 @@ import { useI18n } from 'vue-i18n'
 import Select from '@/components/common/Select.vue'
 import HelpTooltip from '@/components/common/HelpTooltip.vue'
 import BaseDialog from '@/components/common/BaseDialog.vue'
+import Icon from '@/components/icons/Icon.vue'
 import { adminAPI } from '@/api'
-import type { OpsDashboardOverview, OpsWSStatus } from '@/api/admin/ops'
+import type { OpsDashboardOverview, OpsWSStatus, OpsMetricThresholds } from '@/api/admin/ops'
 import type { OpsRequestDetailsPreset } from './OpsRequestDetailsModal.vue'
 import { formatNumber } from '@/utils/format'
 
@@ -24,6 +25,7 @@ interface Props {
   queryMode: string
   loading: boolean
   lastUpdated: Date | null
+  thresholds?: OpsMetricThresholds | null // 阈值配置
 }
 
 interface Emits {
@@ -143,6 +145,42 @@ function getLatencyColor(ms: number | null | undefined): string {
   return 'text-red-600 dark:text-red-400'
 }
 
+// --- Threshold checking helpers ---
+function isSLABelowThreshold(slaPercent: number | null): boolean {
+  if (slaPercent == null) return false
+  const threshold = props.thresholds?.sla_percent_min
+  if (threshold == null) return false
+  return slaPercent < threshold
+}
+
+function isLatencyAboveThreshold(latencyP99Ms: number | null): boolean {
+  if (latencyP99Ms == null) return false
+  const threshold = props.thresholds?.latency_p99_ms_max
+  if (threshold == null) return false
+  return latencyP99Ms > threshold
+}
+
+function isTTFTAboveThreshold(ttftP99Ms: number | null): boolean {
+  if (ttftP99Ms == null) return false
+  const threshold = props.thresholds?.ttft_p99_ms_max
+  if (threshold == null) return false
+  return ttftP99Ms > threshold
+}
+
+function isRequestErrorRateAboveThreshold(errorRatePercent: number | null): boolean {
+  if (errorRatePercent == null) return false
+  const threshold = props.thresholds?.request_error_rate_percent_max
+  if (threshold == null) return false
+  return errorRatePercent > threshold
+}
+
+function isUpstreamErrorRateAboveThreshold(upstreamErrorRatePercent: number | null): boolean {
+  if (upstreamErrorRatePercent == null) return false
+  const threshold = props.thresholds?.upstream_error_rate_percent_max
+  if (threshold == null) return false
+  return upstreamErrorRatePercent > threshold
+}
+
 // --- Realtime / Overview labels ---
 
 const totalRequestsLabel = computed(() => formatNumber(overview.value?.request_count_total ?? 0))
@@ -818,8 +856,9 @@ function openJobsDetails() {
               class="pointer-events-none absolute left-1/2 top-full z-50 mt-2 w-72 -translate-x-1/2 opacity-0 transition-opacity duration-200 group-hover:pointer-events-auto group-hover:opacity-100 md:left-full md:top-0 md:ml-2 md:mt-0 md:translate-x-0"
             >
               <div class="rounded-xl bg-white p-4 shadow-xl ring-1 ring-black/5 dark:bg-gray-800 dark:ring-white/10">
-                <h4 class="mb-3 border-b border-gray-100 pb-2 text-sm font-bold text-gray-900 dark:border-gray-700 dark:text-white">
-                  🧠 {{ t('admin.ops.diagnosis.title') }}
+                <h4 class="mb-3 border-b border-gray-100 pb-2 text-sm font-bold text-gray-900 dark:border-gray-700 dark:text-white flex items-center gap-2">
+                  <Icon name="brain" size="sm" class="text-blue-500" />
+                  {{ t('admin.ops.diagnosis.title') }}
                 </h4>
 
                 <div class="space-y-3">
@@ -850,8 +889,9 @@ function openJobsDetails() {
                     <div class="flex-1">
                       <div class="text-xs font-semibold text-gray-900 dark:text-white">{{ item.message }}</div>
                       <div class="mt-0.5 text-[11px] text-gray-500 dark:text-gray-400">{{ item.impact }}</div>
-                      <div v-if="item.action" class="mt-1 text-[11px] text-blue-600 dark:text-blue-400">
-                        💡 {{ item.action }}
+                      <div v-if="item.action" class="mt-1 text-[11px] text-blue-600 dark:text-blue-400 flex items-center gap-1">
+                        <Icon name="lightbulb" size="xs" />
+                        {{ item.action }}
                       </div>
                     </div>
                   </div>
@@ -1061,7 +1101,7 @@ function openJobsDetails() {
             <div class="flex items-center gap-2">
               <span class="text-[10px] font-bold uppercase text-gray-400">SLA</span>
               <HelpTooltip :content="t('admin.ops.tooltips.sla')" />
-              <span class="h-1.5 w-1.5 rounded-full" :class="(slaPercent ?? 0) >= 99.5 ? 'bg-green-500' : 'bg-yellow-500'"></span>
+              <span class="h-1.5 w-1.5 rounded-full" :class="isSLABelowThreshold(slaPercent) ? 'bg-red-500' : (slaPercent ?? 0) >= 99.5 ? 'bg-green-500' : 'bg-yellow-500'"></span>
             </div>
             <button
               class="text-[10px] font-bold text-blue-500 hover:underline"
@@ -1071,11 +1111,11 @@ function openJobsDetails() {
               {{ t('admin.ops.requestDetails.details') }}
             </button>
           </div>
-          <div class="mt-2 text-3xl font-black text-gray-900 dark:text-white">
+          <div class="mt-2 text-3xl font-black" :class="isSLABelowThreshold(slaPercent) ? 'text-red-600 dark:text-red-400' : 'text-gray-900 dark:text-white'">
             {{ slaPercent == null ? '-' : `${slaPercent.toFixed(3)}%` }}
           </div>
           <div class="mt-3 h-2 w-full overflow-hidden rounded-full bg-gray-200 dark:bg-dark-700">
-            <div class="h-full bg-green-500 transition-all" :style="{ width: `${Math.max((slaPercent ?? 0) - 90, 0) * 10}%` }"></div>
+            <div class="h-full transition-all" :class="isSLABelowThreshold(slaPercent) ? 'bg-red-500' : 'bg-green-500'" :style="{ width: `${Math.max((slaPercent ?? 0) - 90, 0) * 10}%` }"></div>
           </div>
           <div class="mt-3 text-xs">
             <div class="flex justify-between">
@@ -1101,7 +1141,7 @@ function openJobsDetails() {
             </button>
           </div>
           <div class="mt-2 flex items-baseline gap-2">
-            <div class="text-3xl font-black" :class="getLatencyColor(durationP99Ms)">
+            <div class="text-3xl font-black" :class="isLatencyAboveThreshold(durationP99Ms) ? 'text-red-600 dark:text-red-400' : getLatencyColor(durationP99Ms)">
               {{ durationP99Ms ?? '-' }}
             </div>
             <span class="text-xs font-bold text-gray-400">ms (P99)</span>
@@ -1151,7 +1191,7 @@ function openJobsDetails() {
             </button>
           </div>
           <div class="mt-2 flex items-baseline gap-2">
-            <div class="text-3xl font-black" :class="getLatencyColor(ttftP99Ms)">
+            <div class="text-3xl font-black" :class="isTTFTAboveThreshold(ttftP99Ms) ? 'text-red-600 dark:text-red-400' : getLatencyColor(ttftP99Ms)">
               {{ ttftP99Ms ?? '-' }}
             </div>
             <span class="text-xs font-bold text-gray-400">ms (P99)</span>
@@ -1196,7 +1236,7 @@ function openJobsDetails() {
               {{ t('admin.ops.requestDetails.details') }}
             </button>
           </div>
-          <div class="mt-2 text-3xl font-black" :class="(errorRatePercent ?? 0) > 5 ? 'text-red-500' : 'text-gray-900 dark:text-white'">
+          <div class="mt-2 text-3xl font-black" :class="isRequestErrorRateAboveThreshold(errorRatePercent) ? 'text-red-600 dark:text-red-400' : (errorRatePercent ?? 0) > 5 ? 'text-red-500' : 'text-gray-900 dark:text-white'">
             {{ errorRatePercent == null ? '-' : `${errorRatePercent.toFixed(2)}%` }}
           </div>
           <div class="mt-3 space-y-1 text-xs">
@@ -1222,7 +1262,7 @@ function openJobsDetails() {
               {{ t('admin.ops.requestDetails.details') }}
             </button>
           </div>
-          <div class="mt-2 text-3xl font-black" :class="(upstreamErrorRatePercent ?? 0) > 5 ? 'text-red-500' : 'text-gray-900 dark:text-white'">
+          <div class="mt-2 text-3xl font-black" :class="isUpstreamErrorRateAboveThreshold(upstreamErrorRatePercent) ? 'text-red-600 dark:text-red-400' : (upstreamErrorRatePercent ?? 0) > 5 ? 'text-red-500' : 'text-gray-900 dark:text-white'">
             {{ upstreamErrorRatePercent == null ? '-' : `${upstreamErrorRatePercent.toFixed(2)}%` }}
           </div>
           <div class="mt-3 space-y-1 text-xs">