feat: add WebDAV image storage

restore ai review preflight

Merge branch 'fork/Jimmy-Bots/usermult'

Merge branch 'fork/Jimmy-Bots/cf-backup'

Add global system prompt

modified the default val

feat: Add image account concurrency configuration and management

fix: modified encrypted download name in web

feat: add cf r2 backup

Add configurable image poll timeout

Add request content filtering

Improve user key management with editing capabilities and validation

Add rate-limited account removal setting

增加图片管理、日志管理，优化敏感词等场景

Update config and management UI

fix: address copilot review feedback

feat(auth): 增加 admin/user 密钥角色与访问控制

update settings config editing

fix merged proxy and settings regressions

Merge branch 'fork/yiranxiaohui/main'

Refactor settings config and simplify proxy setup

fix(sub2api): 分组列表不再按 platform 过滤

refactor(proxy): 代理 URL 不再做密码遮蔽

feat(sub2api): 支持按分组同步 OpenAI OAuth 账号

feat(proxy): 支持为 chatgpt.com 上游请求配置代理

feat(accounts): 支持从 Sub2API 服务器导入 OpenAI OAuth 账号