- replace placeholder garage interaction with real UI open flow
- add catalog/session/UI bridge services for hydrate, sync, store, and retrieve actions
- migrate garage web UI bundle to new app shell/runtime structure
- align org/store function naming with shared init and UI bridge patterns
- Introduce `OrgUIBridge` to centralize UI event/request/response handling
- Add leave and disband org requests with server handlers and client bridge events
- Enforce portal permissions for leaving/disbanding and protect owner/self from member removal
