initial commit

lib/core/models/run_state.dart

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+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import 'backup_method.dart';
+
+part 'run_state.freezed.dart';
+part 'run_state.g.dart';
+
+/// Mirrors `models.RunState` — the live (in-memory, non-persisted) progress
+/// of a single backup target's current or most recent run. Polled from
+/// `GET /.../backup/targets/:tid/progress` while a run is in flight.
+@freezed
+sealed class RunState with _$RunState {
+  const factory RunState({
+    @Default(false) bool running,
+    @JsonKey(name: 'target_id') @Default('') String targetId,
+    BackupMethod? method,
+    @Default(0) double percent,
+    String? eta,
+    String? message,
+    @JsonKey(name: 'started_at') DateTime? startedAt,
+  }) = _RunState;
+
+  factory RunState.fromJson(Map<String, dynamic> json) => _$RunStateFromJson(json);
+}