✨ feat: Add model performance metrics to dashboard

Add a shared `performance-metrics` feature module for perf metric APIs, DTOs, and formatting, then surface global 24h model performance on the dashboard with cards and a top-model table.

Reuse the shared metrics module from pricing model details, remove duplicated perf API/formatting code from pricing, and add localized labels for the new dashboard performance UI.

web/default/src/features/pricing/components/model-details.tsx

@@ -26,7 +26,12 @@ import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
 import { CopyButton } from '@/components/copy-button'
 import { GroupBadge } from '@/components/group-badge'
 import { PublicLayout } from '@/components/layout'
-import { getPerfMetrics } from '../api'
+import { getPerfMetrics } from '@/features/performance-metrics/api'
+import {
+  formatLatency,
+  formatThroughput,
+  formatUptimePct,
+} from '@/features/performance-metrics/lib/format'
 import { DEFAULT_TOKEN_UNIT, QUOTA_TYPE_VALUES } from '../constants'
 import { usePricingData } from '../hooks/use-pricing-data'
 import {
@@ -36,11 +41,6 @@ import {
   isDynamicPricingModel,
 } from '../lib/dynamic-price'
 import { parseTags } from '../lib/filters'
-import {
-  formatLatency,
-  formatThroughput,
-  formatUptimePct,
-} from '../lib/mock-stats'
 import { getAvailableGroups, isTokenBasedModel } from '../lib/model-helpers'
 import { inferModelMetadata } from '../lib/model-metadata'
 import { formatFixedPrice, formatGroupPrice } from '../lib/price'