## 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_backend/tests/test_views.py

@@ -48,6 +48,7 @@ class ViewTests(TestCase):
         self.assertContains(response, 'aria-label="Primary navigation"', html=False)
         self.assertContains(response, 'aria-label="System navigation"', html=False)
         self.assertContains(response, reverse("dashboard"))
+        self.assertContains(response, reverse("hosts_list"))
         self.assertContains(response, reverse("ssh_credentials"))
         self.assertContains(response, reverse("logs"))
         self.assertContains(response, reverse("purged_snapshots"))
@@ -202,6 +203,72 @@ class ViewTests(TestCase):
         self.assertContains(response, "Snapshot health")
         self.assertNotContains(response, "<html", html=False)
 
+    def test_hosts_list_renders_host_cards_and_controls(self) -> None:
+        self.client.force_login(self.staff_user)
+        web = HostConfig.objects.create(host="web-01", address="web-01.example.test")
+        db = HostConfig.objects.create(host="db-01", address="db-01.example.test", enabled=False)
+        ScheduleConfig.objects.create(host=web, cron_expr="15 2 * * *", enabled=True, prune=True)
+        BackupRun.objects.create(host=web, status=BackupRun.Status.RUNNING)
+
+        response = self.client.get(reverse("hosts_list"))
+
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Inventory")
+        self.assertContains(response, "Configured backup targets")
+        self.assertContains(response, "web-01")
+        self.assertContains(response, "db-01")
+        self.assertContains(response, "running 1")
+        self.assertContains(response, "schedule on")
+        self.assertContains(response, "retention on")
+        self.assertContains(response, "Disable host")
+        self.assertContains(response, "Enable host")
+        self.assertContains(response, "Pause schedule")
+        self.assertContains(response, "Pause retention")
+        self.assertContains(response, reverse("update_host_state", args=[web.host]))
+        self.assertContains(response, reverse("edit_host_config", args=[web.host]))
+        self.assertContains(response, reverse("edit_host_schedule", args=[web.host]))
+
+    def test_hosts_list_filters_by_enabled_state(self) -> None:
+        self.client.force_login(self.staff_user)
+        HostConfig.objects.create(host="web-01", address="web-01.example.test")
+        HostConfig.objects.create(host="db-01", address="db-01.example.test", enabled=False)
+
+        response = self.client.get(reverse("hosts_list"), {"enabled": "no"})
+
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "db-01")
+        self.assertNotContains(response, "web-01")
+
+    def test_update_host_state_toggles_host_schedule_and_retention(self) -> None:
+        self.client.force_login(self.staff_user)
+        host = HostConfig.objects.create(host="web-01", address="web-01.example.test")
+        schedule = ScheduleConfig.objects.create(host=host, cron_expr="15 2 * * *", enabled=True, prune=True)
+
+        response = self.client.post(
+            reverse("update_host_state", args=[host.host]),
+            {"action": "disable_host", "next": reverse("hosts_list")},
+            follow=True,
+        )
+        self.assertRedirects(response, reverse("hosts_list"))
+        host.refresh_from_db()
+        self.assertFalse(host.enabled)
+        self.assertContains(response, "Disabled host web-01.")
+
+        self.client.post(reverse("update_host_state", args=[host.host]), {"action": "disable_schedule"})
+        self.client.post(reverse("update_host_state", args=[host.host]), {"action": "disable_prune"})
+        schedule.refresh_from_db()
+        self.assertFalse(schedule.enabled)
+        self.assertFalse(schedule.prune)
+
+        self.client.post(reverse("update_host_state", args=[host.host]), {"action": "enable_host"})
+        self.client.post(reverse("update_host_state", args=[host.host]), {"action": "enable_schedule"})
+        self.client.post(reverse("update_host_state", args=[host.host]), {"action": "enable_prune"})
+        host.refresh_from_db()
+        schedule.refresh_from_db()
+        self.assertTrue(host.enabled)
+        self.assertTrue(schedule.enabled)
+        self.assertTrue(schedule.prune)
+
     def test_dashboard_renders_backup_trend_summary(self) -> None:
         self.client.force_login(self.staff_user)
         GlobalConfig.objects.create(name="default", backup_root="/missing-backup-root")