semantic cleanup

- Update plugins (debug, mapper, search) to explicitly map environment config to SupersetConfig
- Add authenticate method to SupersetClient for explicit session management
- Add get_environment method to ConfigManager
- Fix navbar dropdown hover stability in frontend with invisible bridge

.gitignore

@@ -69,4 +69,3 @@ backend/tasks.db
 
 # Git Integration repositories
 backend/git_repos/
-backend/backend/git_repos

specs/009-backup-scheduler/tasks.md

@@ -15,7 +15,7 @@
 ## Phase 3: [US1] Scheduled Backups
 - [x] T009 [US1] Implement schedule loading and registration logic in `SchedulerService`
 - [x] T010 [US1] Update `Environment` settings API to handle `backup_schedule` updates in `backend/src/api/routes/environments.py`
-- [ ] T011 [P] [US1] Add schedule configuration fields to Environment edit form in `frontend/src/components/EnvSelector.svelte` (or appropriate component)
+- [x] T011 [P] [US1] Add schedule configuration fields to Environment edit form in `frontend/src/components/EnvSelector.svelte` (or appropriate component)
 - [x] T012 [US1] Implement validation for Cron expressions in backend and frontend
 
 ## Phase 4: [US2] Unified Task Management UI
@@ -34,7 +34,7 @@
 - [x] T021 [US4] Integrate log viewer into TaskList or as a separate modal/page
 
 ## Final Phase: Polish & Cross-cutting concerns
-- [ ] T022 Implement task cleanup/retention policy (e.g., delete tasks older than 30 days)
+- [x] T022 Implement task cleanup/retention policy (e.g., delete tasks older than 30 days)
 - [ ] T023 Add real-time updates for task status using WebSockets (optional/refinement)
 - [x] T024 Ensure consistent error handling and logging across scheduler and task manager