diff --git a/src/components/CloudAccountCard.tsx b/src/components/CloudAccountCard.tsx
index 2253dce..1cb673c 100644
--- a/src/components/CloudAccountCard.tsx
+++ b/src/components/CloudAccountCard.tsx
@@ -29,6 +29,7 @@ import { useProviderGrouping } from '@/hooks/useProviderGrouping';
 import { ProviderGroup } from '@/components/ProviderGroup';
 import {
   clampQuotaPercentage,
+  formatAiCreditsAmount,
   formatResetTimeLabel,
   formatResetTimeTitle,
   getQuotaStatus,
@@ -82,6 +83,19 @@ function isGeminiProHighModel(modelName: string): boolean {
   return normalizedModelName.includes('gemini-3.1-pro-high');
 }
 
+function formatCreditsExpiry(expiryDate: string): string {
+  if (!expiryDate) {
+    return '';
+  }
+
+  try {
+    const date = new Date(expiryDate);
+    return date.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
+  } catch {
+    return expiryDate;
+  }
+}
+
 function isGeminiProFamilyModel(modelName: string): boolean {
   const normalizedModelName = modelName.toLowerCase();
   return normalizedModelName.includes('gemini-3.1-pro');
@@ -325,17 +339,8 @@ export function CloudAccountCard({
     );
 
   const aiCredits = account.quota?.ai_credits;
-  const shouldShowAiCredits = !!aiCredits && Number.isFinite(aiCredits.credits) && aiCredits.credits >= 0;
-
-  const formatCreditsExpiry = (expiryDate: string) => {
-    if (!expiryDate) return '';
-    try {
-      const date = new Date(expiryDate);
-      return date.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
-    } catch {
-      return expiryDate;
-    }
-  };
+  const shouldShowAiCredits =
+    !!aiCredits && Number.isFinite(aiCredits.credits) && aiCredits.credits >= 0;
 
   const validationBlockedStatusLabel = getValidationBlockedStatusLabel(
     account.status,
@@ -379,7 +384,7 @@ export function CloudAccountCard({
 
           {shouldShowAiCredits && aiCredits && (
             <div className="mt-1 flex items-center gap-1 text-[10px] font-medium text-amber-500">
-              <span>${aiCredits.credits.toFixed(2)}</span>
+              <span>{formatAiCreditsAmount(aiCredits.credits)}</span>
               {aiCredits.expiryDate && (
                 <span className="text-muted-foreground opacity-70">
                   ·{' '}
@@ -635,17 +640,8 @@ export function CompactCloudAccountCard({
   );
 
   const aiCredits = account.quota?.ai_credits;
-  const shouldShowAiCredits = !!aiCredits && Number.isFinite(aiCredits.credits) && aiCredits.credits >= 0;
-
-  const formatCreditsExpiry = (expiryDate: string) => {
-    if (!expiryDate) return '';
-    try {
-      const date = new Date(expiryDate);
-      return date.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
-    } catch {
-      return expiryDate;
-    }
-  };
+  const shouldShowAiCredits =
+    !!aiCredits && Number.isFinite(aiCredits.credits) && aiCredits.credits >= 0;
 
   const validationBlockedStatusLabel = getValidationBlockedStatusLabel(
     account.status,
@@ -695,12 +691,14 @@ export function CompactCloudAccountCard({
         <div className="text-muted-foreground flex items-center gap-3 text-xs">
           <span className="truncate">{account.email}</span>
           {validationBlockedStatusLabel && (
-            <span className="text-destructive shrink-0 font-medium">{validationBlockedStatusLabel}</span>
+            <span className="text-destructive shrink-0 font-medium">
+              {validationBlockedStatusLabel}
+            </span>
           )}
 
           {shouldShowAiCredits && aiCredits && (
             <span className="shrink-0 text-amber-500">
-              ${aiCredits.credits.toFixed(2)}
+              {formatAiCreditsAmount(aiCredits.credits)}
               {aiCredits.expiryDate && (
                 <span className="text-muted-foreground">
                   {' '}
diff --git a/src/components/CloudAccountList.tsx b/src/components/CloudAccountList.tsx
index 510b370..7940c40 100644
--- a/src/components/CloudAccountList.tsx
+++ b/src/components/CloudAccountList.tsx
@@ -74,6 +74,7 @@ import {
 import { filter, flatMap, isEmpty, isNumber, size, sumBy } from 'lodash-es';
 import {
   clampQuotaPercentage,
+  formatAiCreditsAmount,
   getQuotaStatus,
   roundQuotaPercentage,
   getAccountSortValue,
@@ -317,7 +318,7 @@ export function CloudAccountList() {
             toast({
               title: t('cloud.toast.quotaRefreshed'),
               description: t('cloud.toast.refreshCreditsAvailable', {
-                amount: credits.toFixed(2),
+                amount: formatAiCreditsAmount(credits),
               }),
             });
             return;
diff --git a/src/ipc/cloud/handler.ts b/src/ipc/cloud/handler.ts
index 03cffbe..87a06b1 100644
--- a/src/ipc/cloud/handler.ts
+++ b/src/ipc/cloud/handler.ts
@@ -54,7 +54,10 @@ function normalizeProjectId(projectId?: string): string | null {
   return normalized === '' ? null : normalized;
 }
 
-function recoverCachedQuotaOnRateLimit(account: CloudAccount, error: unknown): CloudAccount['quota'] | null {
+function recoverCachedQuotaOnRateLimit(
+  account: CloudAccount,
+  error: unknown,
+): CloudAccount['quota'] | null {
   const classified = classifyAccountStatusFromError(error);
   if (!classified || classified.status !== 'rate_limited') {
     return null;
@@ -148,7 +151,10 @@ async function clearAccountStatus(account: CloudAccount): Promise<void> {
 }
 
 function hydrateActiveOAuthClientFromSettings(): void {
-  const preferredClientKey = CloudAccountRepo.getSetting<string>(ACTIVE_OAUTH_CLIENT_KEY_SETTING, '');
+  const preferredClientKey = CloudAccountRepo.getSetting<string>(
+    ACTIVE_OAUTH_CLIENT_KEY_SETTING,
+    '',
+  );
   if (isString(preferredClientKey) && !isEmpty(preferredClientKey.trim())) {
     try {
       GoogleAPIService.setActiveOAuthClientKey(preferredClientKey);
@@ -165,7 +171,10 @@ function hydrateActiveOAuthClientFromSettings(): void {
 async function backfillMissingOAuthClientKeyForLegacyAccounts(
   accounts: CloudAccount[],
 ): Promise<boolean> {
-  const backfillDone = CloudAccountRepo.getSetting<boolean>(OAUTH_CLIENT_KEY_BACKFILL_DONE_SETTING, false);
+  const backfillDone = CloudAccountRepo.getSetting<boolean>(
+    OAUTH_CLIENT_KEY_BACKFILL_DONE_SETTING,
+    false,
+  );
   if (backfillDone) {
     return false;
   }
@@ -282,7 +291,10 @@ export async function addGoogleAccount(
     try {
       const quota = await GoogleAPIService.fetchQuota(account.token.access_token);
       try {
-        const aiCredits = await GoogleAPIService.fetchAICredits(account.token.access_token);
+        const aiCredits = await GoogleAPIService.fetchAICredits(
+          account.token.access_token,
+          undefined,
+        );
         if (aiCredits) {
           quota.ai_credits = aiCredits;
         } else {
@@ -708,7 +720,10 @@ export function getActiveOAuthClient(): string {
 
 export function setActiveOAuthClient(clientKey: string): void {
   GoogleAPIService.setActiveOAuthClientKey(clientKey);
-  CloudAccountRepo.setSetting(ACTIVE_OAUTH_CLIENT_KEY_SETTING, GoogleAPIService.getActiveOAuthClientKey());
+  CloudAccountRepo.setSetting(
+    ACTIVE_OAUTH_CLIENT_KEY_SETTING,
+    GoogleAPIService.getActiveOAuthClientKey(),
+  );
 }
 
 export async function exportCloudAccounts(stripTokens = false): Promise<string> {
diff --git a/src/services/GoogleAPIService.ts b/src/services/GoogleAPIService.ts
index a0e34fa..3cd6486 100644
--- a/src/services/GoogleAPIService.ts
+++ b/src/services/GoogleAPIService.ts
@@ -33,9 +33,6 @@ const QUOTA_API_ENDPOINTS = [
   'https://cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels',
 ] as const;
 
-// Internal API masquerading
-const USER_AGENT = 'antigravity/1.11.3 Darwin/arm64';
-
 // Request timeout in milliseconds (30 seconds)
 const REQUEST_TIMEOUT_MS = 30000;
 
@@ -898,7 +895,7 @@ export class GoogleAPIService {
 
       const fallbackData = (await fallbackResponse.json()) as LoadProjectResponse;
       return extractAiCreditsFromProjectContext(fallbackData);
-    } catch (e) {
+    } catch {
       return null;
     }
   }
diff --git a/src/utils/quota-display.ts b/src/utils/quota-display.ts
index afec1e9..acc469a 100644
--- a/src/utils/quota-display.ts
+++ b/src/utils/quota-display.ts
@@ -31,6 +31,12 @@ export function roundQuotaPercentage(value: number): number {
   return Math.round(value * 10) / 10;
 }
 
+export function formatAiCreditsAmount(credits: number): string {
+  return new Intl.NumberFormat('en-US', {
+    maximumFractionDigits: 2,
+  }).format(credits);
+}
+
 export function formatTimeRemaining(dateStr: string): string | null {
   const targetDate = new Date(dateStr);
   if (Number.isNaN(targetDate.getTime())) {