fix(i18n): add missing OpenAI account entry labels

- admin.accounts.oauth.openai.mobileRefreshTokenAuth was referenced by
  OAuthAuthorizationFlow.vue since 9f8cffe88 (Mobile RT entry) but never
  added to zh/en locales, rendering the raw key in the add-account wizard
- admin.accounts.oauth.openai.accessTokenAuth has the same latent issue
  since 26060e702 (Sora AT import); currently hidden but fixed alongside

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/i18n/locales/en/admin/accounts.ts

@@ -868,6 +868,8 @@ export default {
           refreshTokenAuth: 'Manual RT Input',
           refreshTokenDesc: 'Enter your existing OpenAI Refresh Token(s). Supports batch input (one per line). The system will automatically validate and create accounts.',
           refreshTokenPlaceholder: 'Paste your OpenAI Refresh Token...\nSupports multiple, one per line',
+          mobileRefreshTokenAuth: 'Manual Mobile RT Input',
+          accessTokenAuth: 'Manual AT Input',
           codexSessionAuth: 'Codex OAuth auth.json / AT Import',
           codexSessionDesc: 'Paste a Codex OAuth auth.json or an accessToken. Accounts use the step 1 settings.',
           codexSessionInputLabel: 'Codex OAuth auth.json or accessToken',

frontend/src/i18n/locales/zh/admin/accounts.ts

@@ -955,6 +955,8 @@ export default {
           refreshTokenAuth: '手动输入 RT',
           refreshTokenDesc: '输入您已有的 OpenAI Refresh Token，支持批量输入（每行一个），系统将自动验证并创建账号。',
           refreshTokenPlaceholder: '粘贴您的 OpenAI Refresh Token...\n支持多个，每行一个',
+          mobileRefreshTokenAuth: '手动输入 Mobile RT',
+          accessTokenAuth: '手动输入 AT',
           codexSessionAuth: 'Codex OAuth auth.json / AT 导入',
           codexSessionDesc: '粘贴 Codex OAuth auth.json 或 accessToken，按第一步配置创建账号。',
           codexSessionInputLabel: 'Codex OAuth auth.json 或 accessToken',