feat: 修复了插件需要外部Provider的问题；加上了一个简易的车控状态返回

lib/bloc/command_state.dart

@@ -0,0 +1,68 @@
+import '../enums/vehicle_command_type.dart';
+
+// AI Chat Command States
+enum AIChatCommandStatus {
+  idle,
+  executing,
+  success,
+  failure,
+  cancelled,
+}
+
+class AIChatCommandState {
+  final String? commandId;
+  final VehicleCommandType? commandType;
+  final Map<String, dynamic>? params;
+  final AIChatCommandStatus status;
+  final String? errorMessage;
+  final Map<String, dynamic>? result;
+  final DateTime? timestamp;
+
+  const AIChatCommandState({
+    this.commandId,
+    this.commandType,
+    this.params,
+    this.status = AIChatCommandStatus.idle,
+    this.errorMessage,
+    this.result,
+    this.timestamp,
+  });
+
+  AIChatCommandState copyWith({
+    String? commandId,
+    VehicleCommandType? commandType,
+    Map<String, dynamic>? params,
+    AIChatCommandStatus? status,
+    String? errorMessage,
+    Map<String, dynamic>? result,
+    DateTime? timestamp,
+  }) {
+    return AIChatCommandState(
+      commandId: commandId ?? this.commandId,
+      commandType: commandType ?? this.commandType,
+      params: params ?? this.params,
+      status: status ?? this.status,
+      errorMessage: errorMessage ?? this.errorMessage,
+      result: result ?? this.result,
+      timestamp: timestamp ?? this.timestamp,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is AIChatCommandState &&
+        other.commandId == commandId &&
+        other.commandType == commandType &&
+        other.status == status &&
+        other.errorMessage == errorMessage;
+  }
+
+  @override
+  int get hashCode {
+    return commandId.hashCode ^
+    commandType.hashCode ^
+    status.hashCode ^
+    errorMessage.hashCode;
+  }
+}