feat(cliproxy): support duplicate-email codex accounts

- keep Codex team and personal auth files as separate identities

- resolve quota and live monitor stats by token file-backed account id

- surface duplicate-aware account labels across the dashboard and variant UI

ui/src/components/setup/wizard/steps/account-step.tsx

@@ -4,6 +4,7 @@
 
 import { Button } from '@/components/ui/button';
 import { ChevronRight, ArrowLeft, User, ExternalLink } from 'lucide-react';
+import { formatAccountDisplayName } from '@/lib/account-identity';
 import { cn } from '@/lib/utils';
 import { PRIVACY_BLUR_CLASS } from '@/contexts/privacy-context';
 import type { AccountStepProps } from '../types';
@@ -37,7 +38,7 @@ export function AccountStep({
               </div>
               <div>
                 <div className={cn('font-medium', privacyMode && PRIVACY_BLUR_CLASS)}>
-                  {acc.email || acc.id}
+                  {formatAccountDisplayName(acc.id, acc.email)}
                 </div>
                 {acc.isDefault && (
                   <div className="text-xs text-muted-foreground">Default account</div>

ui/src/components/setup/wizard/steps/variant-step.tsx

@@ -6,6 +6,7 @@ import { useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
+import { formatAccountDisplayName } from '@/lib/account-identity';
 import {
   Select,
   SelectContent,
@@ -63,7 +64,7 @@ export function VariantStep({
           <span>
             {t('setupVariant.using')}{' '}
             <span className={cn(privacyMode && PRIVACY_BLUR_CLASS)}>
-              {selectedAccount.email || selectedAccount.id}
+              {formatAccountDisplayName(selectedAccount.id, selectedAccount.email)}
             </span>
           </span>
         </div>