feat(codex): add AiHubMix provider and enhance configuration UX

- Add new AiHubMix provider preset with dual endpoints
- Fix AnyRouter base_url inconsistency (add /v1 suffix)
- Add configuration wizard shortcut link for Codex custom mode
- Improve accessibility with aria-label for wizard button
- Remove unused isCustomMode prop from CodexConfigEditor
- Add internationalization for new UI elements (zh/en)

src/components/providers/forms/CodexConfigEditor.tsx

@@ -28,8 +28,6 @@ interface CodexConfigEditorProps {
 
   configError: string; // config.toml 错误提示
 
-  isCustomMode?: boolean; // 是否为自定义模式
-
   onWebsiteUrlChange?: (url: string) => void; // 更新网址回调
 
   isTemplateModalOpen?: boolean; // 模态框状态