(feature) Add live refresh for dashboard status panels

Split dashboard priority and host status sections into server-rendered
partials and wire them into the shared refresh hook so operational state
updates without a full page reload.

Refs #36

src/pobsync_backend/views.py

@@ -48,6 +48,20 @@ from .stats_summary import collect_dashboard_stats, collect_host_stats
 
 @staff_member_required
 def dashboard(request):
+    return render(request, "pobsync_backend/dashboard.html", _dashboard_context())
+
+
+@staff_member_required
+def dashboard_priority_live(request):
+    return render(request, "pobsync_backend/partials/dashboard_priority.html", _dashboard_context())
+
+
+@staff_member_required
+def dashboard_hosts_live(request):
+    return render(request, "pobsync_backend/partials/dashboard_hosts.html", _dashboard_context())
+
+
+def _dashboard_context() -> dict[str, object]:
     global_config = GlobalConfig.objects.filter(name="default").first()
     hosts = list(
         HostConfig.objects.select_related("schedule")
@@ -109,7 +123,7 @@ def dashboard(request):
             ).count(),
         },
     }
-    return render(request, "pobsync_backend/dashboard.html", context)
+    return context
 
 
 def _dashboard_action_items(hosts: list[HostConfig]) -> list[dict[str, object]]: