* feat(deeplink): support comma-separated multiple endpoints in URL
Allow importing multiple API endpoints via single endpoint parameter.
First URL becomes primary endpoint, rest are added as custom endpoints.
* feat(deeplink): add usage query fields to deeplink generator
Add form fields for usage query configuration in deeplink HTML generator:
- usageEnabled, usageBaseUrl, usageApiKey
- usageScript, usageAutoInterval
- usageAccessToken, usageUserId
* fix(deeplink): auto-infer homepage and improve multi-endpoint display
- Auto-infer homepage from primary endpoint when not provided
- Display multiple endpoints as list in import dialog (primary marked)
- Update deeplink parser in deplink.html to show multi-endpoint info
- Add test for homepage inference from endpoint
- Minor log format fix in live.rs
* fix(deeplink): use primary endpoint for usage script base_url
- Fix usage_script.base_url getting comma-separated string when multiple endpoints
- Add i18n support for primary endpoint label in DeepLinkImportDialog
- Remove `is_proxy_target` field from Provider struct (Rust & TypeScript)
- Remove related DAO methods: get_proxy_target_provider, set_proxy_target
- Remove deprecated Tauri commands: get_proxy_targets, set_proxy_target
- Add `is_available()` method to CircuitBreaker for availability checks
without consuming HalfOpen probe permits (used in select_providers)
- Keep `allow_request()` for actual request gating with permit tracking
- Update stream_check to use failover_queue instead of is_proxy_target
- Clean up commented-out reset circuit breaker button in ProviderActions
- Remove unused useProxyTargets and useSetProxyTarget hooks
Remove the skillsPath field from SkillRepo and Skill structs since
recursive scanning now automatically discovers skills in all directories.
Simplify the UI by removing the path input field.
Add recursive directory scanning to discover SKILL.md files in nested
directories. When a SKILL.md is found, treat sibling directories as
functional folders rather than separate skills.