feat: Add MET history isolation

test/providers/contacts_provider_profile_scope_test.dart

@@ -0,0 +1,69 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/services/contact_storage_service.dart';
+import 'package:meshcore_sar_app/services/profiles_feature_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  Contact createContact({
+    required Uint8List key,
+    required String name,
+  }) {
+    return Contact(
+      publicKey: key,
+      type: ContactType.chat,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: (46.0569 * 1e6).round(),
+      advLon: (14.5058 * 1e6).round(),
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+    ProfileStorageScope.setScope(
+      profilesEnabled: true,
+      activeProfileId: 'default',
+    );
+  });
+
+  test('initializeEarly respects the active profile storage namespace', () async {
+    final storage = ContactStorageService();
+    final defaultContact = createContact(
+      key: Uint8List.fromList(List<int>.filled(32, 1)),
+      name: 'Default Contact',
+    );
+    final alphaContact = createContact(
+      key: Uint8List.fromList(List<int>.filled(32, 2)),
+      name: 'Alpha Contact',
+    );
+
+    await storage.saveContacts([defaultContact]);
+    await storage.saveContacts([alphaContact], namespace: 'alpha');
+
+    ProfileStorageScope.setScope(
+      profilesEnabled: true,
+      activeProfileId: 'alpha',
+    );
+
+    final provider = ContactsProvider();
+    await provider.initializeEarly();
+
+    final names = provider.contacts
+        .where((contact) => !contact.isChannel)
+        .map((contact) => contact.advName)
+        .toList();
+
+    expect(names, <String>['Alpha Contact']);
+    expect(provider.storageNamespace, 'alpha');
+  });
+}