feat(grok): add admin oauth and quota support

frontend/src/features/providers/utils/__tests__/providerTypeUtils.spec.ts

@@ -8,4 +8,10 @@ describe('providerTypeUtils', () => {
     expect(isOAuthAccountProviderType('ChatGPT_Web')).toBe(true)
     expect(isKeyManagedProviderType('chatgpt_web')).toBe(false)
   })
+
+  it('treats Grok as an OAuth account provider', () => {
+    expect(isOAuthAccountProviderType('grok')).toBe(true)
+    expect(isOAuthAccountProviderType('GROK')).toBe(true)
+    expect(isKeyManagedProviderType('grok')).toBe(false)
+  })
 })

frontend/src/features/providers/utils/providerTypeUtils.ts

@@ -11,6 +11,7 @@ const oauthAccountProviderTypes = new Set([
   'gemini_cli',
   'antigravity',
   'kiro',
+  'grok',
 ])
 
 export const isOAuthAccountProviderType = (providerType?: string | null): boolean =>