## Summary
- add explicit workspace closure and tenant removal lifecycle truth with a bounded `WorkspaceLifecycleService`
- surface closure and removal posture across admin/system pages, chooser recovery, and canonical historical viewers
- block new review-pack and operation starts for closed workspaces or removed tenants while preserving memberships, audit, and history
- add focused Pest coverage plus the Spec 292 artifacts for the implemented slice
## Testing
- `export PATH="/bin:/usr/bin:/usr/local/bin:$PATH" && cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Feature/System/Directory/ViewWorkspaceClosureTest.php tests/Feature/System/Ops/ClosedWorkspaceHistoricalAccessTest.php tests/Feature/Filament/Resources/Workspaces/WorkspaceClosureStatusTest.php tests/Feature/Filament/Resources/TenantResource/TenantWorkspaceRemovalTest.php tests/Feature/Filament/Pages/WorkspaceContextClosureRecoveryTest.php`
- `export PATH="/bin:/usr/bin:/usr/local/bin:$PATH" && cd apps/platform && ./vendor/bin/sail bin pint --dirty --format agent`
- manual integrated-browser smoke for admin tenant remove/restore plus chooser recovery and system workspace close/reopen
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #337
