Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lib/Peach/memory/InternalMemory.dart

@@ -0,0 +1,49 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../about/internal/application/DeploymentRecord.dart';
+import '../about/internal/application/ServerProfile.dart';
+import 'ConfigStore.dart';
+import 'ConnectInternalMemory.dart';
+import 'DeploymentStore.dart';
+
+/// The one concrete [ConnectInternalMemory]. Non-secret data goes to
+/// shared_preferences via the two stores; passwords go to the OS keystore via
+/// [SecretStore] — reads hydrate them back onto the profiles so callers only
+/// ever see whole [ServerProfile]s.
+class InternalMemory implements ConnectInternalMemory {
+  static const _themeKey = 'peach.thememode';
+
+  final ConfigStore _config = ConfigStore();
+  final DeploymentStore _deployments = DeploymentStore();
+
+  @override
+  Future<List<ServerProfile>> getServers() => _config.load();
+
+  @override
+  Future setServers(List<ServerProfile> servers) => _config.save(servers);
+
+  @override
+  Future deleteServerSecret(String serverId) => _config.deleteSecret(serverId);
+
+  @override
+  Future<List<DeploymentRecord>> getDeployments() => _deployments.load();
+
+  @override
+  Future<List<DeploymentRecord>> addDeployment(DeploymentRecord record) =>
+      _deployments.add(record);
+
+  @override
+  Future clearDeployments() => _deployments.clear();
+
+  @override
+  Future<String> getThemeMode() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_themeKey) ?? 'dark';
+  }
+
+  @override
+  Future setThemeMode(String mode) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_themeKey, mode);
+  }
+}