GitLab

1. Frontend: replace hardcoded antigravityDefaultMappings with async
   fetch from GET /admin/accounts/antigravity/default-model-mapping,
   eliminating the duplicate data source that caused frontend/backend
   mapping inconsistency.

2. Backend: convert handleSmartRetry and antigravityRetryLoop from
   standalone functions to AntigravityGatewayService methods, enabling
   Redis cache sync (updateAccountModelRateLimitInCache) after both
   rate-limit write paths — long-delay branch and retry-exhausted branch.

Key changes:
- Upgrade model mapping: Opus 4.5 → Opus 4.6-thinking with precise matching
- Unified rate limiting: scope-level → model-level with Redis snapshot sync
- Load-balanced scheduling by call count with smart retry mechanism
- Force cache billing support
- Model identity injection in prompts with leak prevention
- Thinking mode auto-handling (max_tokens/budget_tokens fix)
- Frontend: whitelist mode toggle, model mapping validation, status indicators
- Gemini session fallback with Redis Trie O(L) matching
- Ops: enhanced concurrency monitoring, account availability, retry logic
- Migration scripts: 049-051 for model mapping unification

- 移除已弃用的 1.5 系列模型
- 调整模型优先级顺序（2.0 Flash > 2.5 Flash > 2.5 Pro > 3.0 Preview）
- 同步前后端模型配置
- 更新相关测试用例和默认模型选择逻辑

修复编辑账号页面 GPT-5 模型只显示 3 个的问题：
- 原来只有: gpt-5, gpt-5-mini, gpt-5-nano
- 现在添加完整的 22 个模型，包括：
  * GPT-5 系列: gpt-5, gpt-5-codex, gpt-5-chat, gpt-5-pro, gpt-5-mini, gpt-5-nano 及各时间戳版本
  * GPT-5.1 系列: gpt-5.1, gpt-5.1-codex, gpt-5.1-codex-max, gpt-5.1-codex-mini 及各版本
  * GPT-5.2 系列: gpt-5.2, gpt-5.2-codex, gpt-5.2-pro 及各版本
- 更新快捷预设按钮，新增 GPT-5.1, GPT-5.2, GPT-5.1 Codex 选项

与后端定价文件 (model_prices_and_context_window.json) 保持一致。

Fixes issue introduced in fb86002e (feat: 添加模型白名单选择器组件)
Related-to: fb86002e

- 新增 ModelWhitelistSelector.vue 支持模型白名单多选
- 新增 ModelIcon.vue 显示品牌图标（基于 @lobehub/icons）
- 新增 useModelWhitelist.ts 硬编码各平台模型列表
- 更新账号编辑表单支持模型白名单配置
- 支持 Claude/OpenAI/Gemini/智谱/百度/讯飞等主流平台

🤖 Generated with [Claude Code](https://claude.com/claude-code

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>