GitLab

- 缓存按 (groupID, platform, model) 三维 key 扁平化，避免跨平台同名模型冲突
- buildCache 批量查询 group platform，按平台过滤展开定价和映射
- model_mapping 改为嵌套格式 {platform: {src: dst}}
- channel_model_pricing 新增 platform 列
- 前端按平台维度重构：每个平台独立配置分组/映射/定价
- 迁移 086: platform 列 + model_mapping 嵌套格式迁移

- 缓存重构为 O(1) 哈希结构 (pricingByGroupModel, mappingByGroupModel)
- 渠道模型映射接入网关流程 (Forward 前应用, a→b→c 映射链)
- 新增 billing_model_source 配置 (请求模型/最终模型计费)
- usage_logs 新增 channel_id, model_mapping_chain, billing_tier 字段
- 每种计费模式统一支持默认价格 + 区间定价
- 渠道模型限制开关 (restrict_models)
- 分组按平台分类展示 + 彩色图标
- 必填字段红色星号 + 模型映射 UI
- 去除模型通配符支持

- 渠道模型映射：新增 model_mapping JSONB 字段，在账号映射之前执行
- 分组选择：添加搜索过滤 + 平台图标
- 定价卡片：支持折叠/展开，已有数据默认折叠
- 模型冲突校验：前后端均禁止同一渠道内重复模型
- 迁移 083: channels 表添加 model_mapping 列

- 模型输入改为标签列表（输入回车添加，支持粘贴批量导入）
- 价格显示单位改为 $/MTok（每百万 token），提交时自动转换
- Token 模式增加图片输出价格字段（适配 Gemini 图片模型按 token 计费）
- 区间边界改为左开右闭 (min, max]，右边界包含
- 默认价格作为未命中区间时的回退价格
- 添加完整中英文 i18n 翻译

Cherry-picked from release/custom-0.1.106: a9117600

feat(redeem): support negative values for refund/deduction

feat(openai): OpenAI OAuth 账号管理增强：订阅状态、隐私设置、Token 刷新修复

fix(antigravity): 修复批量刷新令牌不设置隐私模式的问题

Allow redeem codes with negative values to enable refund scenarios:
- Balance: negative value deducts balance (clamped to 0, never negative)
- Concurrency: negative value reduces concurrency (clamped to 0)
- Subscription: negative validity_days reduces remaining days; if
  remaining days <= 0, the subscription is canceled (set to expired)

All deductions generate standard redeem code records for audit trail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

从 /backend-api/accounts/check 的 entitlement.expires_at 提取订阅
到期日期，每次 token 刷新时更新并存入 credentials，前端账号列表
的订阅类型和隐私下方以灰色小字显示（仅非 Free 账号）。
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1. CreateAccount 补齐 OpenAI OAuth 隐私入口（与 BatchCreate 对齐）
2. disableOpenAITraining 请求头修正：覆盖 ImpersonateChrome() 的
   浏览器导航默认头（accept: text/html, sec-fetch-mode: navigate），
   改为 API 请求语义（Accept: application/json, sec-fetch-mode: cors），
   避免 Cloudflare 将 PATCH API 请求误判为异常导航流量而拦截
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Prevents token silent expiry during 7-day rate limit periods.

Made-with: Cursor

- ratelimit_service: detect non-standard OpenAI 401 format and permanently disable account
- account_test_service: mark account error on 401 during connection test

Made-with: Cursor

账号订阅类型可能每月变化，id_token 中的 plan_type 是签发时的快照，
不一定反映当前状态。移除 plan_type == "" 前置条件，确保每次刷新都
调用 ChatGPT backend-api 获取实时订阅类型并覆盖旧值。
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- refreshSingleAccount ProjectIDMissing 提前返回前补上 EnsureAntigravityPrivacy 调用
- EnsureAntigravityPrivacy 跳过条件从"有任何值"改为"仅 privacy_set 成功时跳过"，
  privacy_set_failed 允许重试，对齐 OpenAI shouldSkipOpenAIPrivacyEnsure 的行为
- 后台 TokenRefreshService.ensureAntigravityPrivacy 同步修改
- ExchangeCode/ValidateRefreshToken 获得令牌后立即调用 setAntigravityPrivacy，
  不依赖后续账号创建流程

Made-with: Cursor

fix(openai): preserve bare gpt-5.3-codex-spark across forwarding paths

Fix Gemini CLI 404s for gemini-3.1-pro-preview-customtools

feat(gateway): Cache-Driven RPM Buffer

feat(group-filter): 分组账号过滤控制 — require_oauth_only + require_privacy_set

feat(antigravity): 令牌刷新失败及创建账号时也设置隐私

- buffer 公式从 baseRPM/5 改为 concurrency + maxSessions
  保留 baseRPM/5 作为 floor 向后兼容
- 粘性路径 fallback 新增 [StickyCacheMiss] 结构化日志
  reason: rpm_red / gate_check / session_limit / wait_queue_full / account_cleared
- session_limit 路径跳过 wait queue 重试（RegisterSession 拒绝无副作用）
- 典型配置 buffer 从 3 提升至 13，大幅减少高峰期 Prompt Cache Miss
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

为 OpenAI/Antigravity/Anthropic/Gemini 分组新增两个布尔控制字段：
- require_oauth_only: 创建/更新账号绑定分组时拒绝 apikey 类型加入
- require_privacy_set: 调度选号时跳过 privacy 未成功设置的账号并标记 error

后端：Ent schema 新增字段 + 迁移、Group CRUD 全链路透传、
      gateway_service 与 openai_account_scheduler 两套调度路径过滤
前端：创建/编辑表单 toggle 开关（OpenAI/Antigravity/Anthropic/Gemini 平台可见）
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- token_refresh: 不可重试错误和重试耗尽两条路径添加 ensureAntigravityPrivacy
- admin_service: CreateAccount 为 Antigravity OAuth 账号异步设置隐私
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Anthropic compat requests normalize reasoning suffixes before forwarding, but the account mapping step was still using the raw request model. Resolve billing and upstream models from the normalized compat model so explicit account mappings win over fallback defaults.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent

)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

# Conflicts:
#	backend/internal/service/openai_gateway_messages.go

Add a purple dashed line showing cache hit rate percentage
(cache_read / (cache_read + cache_creation)) on a secondary
right Y-axis (0-100%). Applies to both user and admin dashboards.

feat(antigravity): progressive penalty for consecutive INTERNAL 500 errors