优化取消提交交互

lib/shared/helpers/audit_flow_helper.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:tdesign_flutter/tdesign_flutter.dart';
 import '../../core/i18n/app_localizations.dart';
 import '../../core/theme/app_colors_extension.dart';
+import '../widgets/loading_dialog.dart';
 
 /// 审核流处理工具。
 ///
@@ -33,20 +34,40 @@ class AuditFlowHelper {
       if (!hasFlow) return;
 
       if (autoSubmit) {
-        if (!skipOnAutoSubmit) await onShSubmit();
+        if (!skipOnAutoSubmit) {
+          // ignore: use_build_context_synchronously
+          await _runWithLoading(context, l10n, onShSubmit);
+        }
         return;
       }
 
       // ignore: use_build_context_synchronously
       final shouldSubmit = await _showDialog(colors, context, l10n);
       if (shouldSubmit == true) {
-        await onShSubmit();
+        // ignore: use_build_context_synchronously
+        await _runWithLoading(context, l10n, onShSubmit);
       }
     } catch (_) {
       // getBillAuditConfig 或 SHSubmit 失败均不阻塞流程
     }
   }
 
+  /// SHSubmit 执行期间显示 loading，成功失败均自动隐藏。
+  static Future<void> _runWithLoading(
+    BuildContext context,
+    AppLocalizations l10n,
+    Future<void> Function() onShSubmit,
+  ) async {
+    // ignore: use_build_context_synchronously
+    LoadingDialog.show(context, text: l10n.get('submitting'));
+    try {
+      await onShSubmit();
+    } finally {
+      // ignore: use_build_context_synchronously
+      LoadingDialog.hide(context);
+    }
+  }
+
   static Future<bool?> _showDialog(
     AppColorsExtension colors,
     BuildContext context,