## Summary

- Add a dedicated `/hosts/` page with host cards and enabled/disabled filtering.
- Link the dashboard Hosts metric and top navigation to the new page.
- Add host enable/disable plus schedule and scheduled-retention pause/resume actions.

## Tests
- `.venv/bin/python manage.py test src.pobsync_backend.tests.test_views.ViewTests.test_base_navigation_groups_primary_and_system_links src.pobsync_backend.tests.test_views.ViewTests.test_dashboard_renders_hosts_and_latest_runs src.pobsync_backend.tests.test_views.ViewTests.test_dashboard_hosts_live_returns_hosts_partial src.pobsync_backend.tests.test_views.ViewTests.test_hosts_list_renders_host_cards_and_controls src.pobsync_backend.tests.test_views.ViewTests.test_hosts_list_filters_by_enabled_state src.pobsync_backend.tests.test_views.ViewTests.test_update_host_state_toggles_host_schedule_and_retention --verbosity 2`
- `.venv/bin/python manage.py check`
- `.venv/bin/python manage.py test src.pobsync_backend --verbosity 2`

Closes #48
Closes #49

src/pobsync_server/urls.py

@@ -21,8 +21,10 @@ urlpatterns = [
     path("ssh-credentials/generate/", views.generate_ssh_credential, name="generate_ssh_credential"),
     path("ssh-credentials/<int:credential_id>/", views.edit_ssh_credential, name="edit_ssh_credential"),
     path("ssh-credentials/<int:credential_id>/delete/", views.delete_ssh_credential, name="delete_ssh_credential"),
+    path("hosts/", views.hosts_list, name="hosts_list"),
     path("hosts/new/", views.create_host_config, name="create_host_config"),
     path("hosts/<str:host>/", views.host_detail, name="host_detail"),
+    path("hosts/<str:host>/state/", views.update_host_state, name="update_host_state"),
     path("hosts/<str:host>/config/", views.edit_host_config, name="edit_host_config"),
     path("hosts/<str:host>/prepare-directories/", views.prepare_host_directories, name="prepare_host_directories"),
     path("hosts/<str:host>/scan-known-key/", views.scan_host_known_key, name="scan_host_known_key"),