feat: add Floor and Sensor providers

lib/providers.dart

@@ -1,6 +1,8 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import 'domain/models/server_config.dart';
+import 'domain/models/sensor.dart';
+import 'domain/models/floor.dart';
 import 'domain/models/tag.dart';
 import 'domain/models/particle.dart';
 import 'domain/models/floor_plan_mode.dart';
@@ -104,10 +106,36 @@ final tagRepositoryProvider = Provider<TagRepository>((ref) {
   );
 });
 
-final floorPlanRepositoryProvider = Provider<FloorPlanRepository>((ref) {
+final floorRepositoryProvider = Provider<FloorRepository>((ref) {
   return PhoenixFloorPlanRepository(client: ref.watch(floorClientProvider));
 });
 
+// ---------------------------------------------------------------------------
+// Floor plan data
+// ---------------------------------------------------------------------------
+
+final floorProvider = FutureProvider.autoDispose<Floor?>((ref) =>
+    ref.watch(floorRepositoryProvider).getFirstFloor());
+
+final roomsProvider = FutureProvider.autoDispose<List<Room>>((ref) async {
+  final floor = await ref.watch(floorProvider.future);
+  if (floor == null) return [];
+  return ref.watch(floorRepositoryProvider).getRooms(floor.id);
+});
+
+// ---------------------------------------------------------------------------
+// Sensor data
+// ---------------------------------------------------------------------------
+
+final sensorsProvider = FutureProvider.autoDispose<List<Sensor>>((ref) {
+  return ref.watch(sensorRepositoryProvider).getSensors();
+});
+
+final sensorProvider =
+    FutureProvider.autoDispose.family<Sensor, int>((ref, id) {
+  return ref.watch(sensorRepositoryProvider).getSensor(id);
+});
+
 // ---------------------------------------------------------------------------
 // Cross-tab UI state
 // ---------------------------------------------------------------------------