feat(usage): add credential (auth index) breakdown card

src/pages/UsagePage.tsx

@@ -24,6 +24,7 @@ import {
   ApiDetailsCard,
   ModelStatsCard,
   PriceSettingsCard,
+  CredentialStatsCard,
   useUsageData,
   useSparklines,
   useChartData
@@ -362,6 +363,9 @@ export function UsagePage() {
         <ModelStatsCard modelStats={modelStats} loading={loading} hasPrices={hasPrices} />
       </div>
 
+      {/* Credential Stats */}
+      <CredentialStatsCard usage={filteredUsage} loading={loading} />
+
       {/* Price Settings */}
       <PriceSettingsCard
         modelNames={modelNames}