feat(ui):修复自定义主题页不应该出现的弹窗

@@ -32,6 +32,7 @@ class CreateWatchThemeController extends GetxController {
   final isSaving = false.obs;
   final List<int> _imageTaskVersions = List<int>.filled(4, 0);
   bool _isClosed = false;
+  bool _creationCompleted = false;
   late final TextEditingController themeNameController;
 
   @override
@@ -199,6 +200,9 @@ class CreateWatchThemeController extends GetxController {
   }
 
   Future<void> handleCreateBack() async {
+    if (_creationCompleted) {
+      return;
+    }
     if (customThemeName.value.isEmpty &&
         !customImagePaths.any((path) => path != null && path.isNotEmpty)) {
       Get.back();
@@ -260,12 +264,16 @@ class CreateWatchThemeController extends GetxController {
       }
 
       final createdTheme = await _loadCreatedTheme();
-      await Get.offAndToNamed(
-        Routes.WATCH_THEME_CUSTOM_PREVIEW,
-        arguments: {
-          'theme': createdTheme ?? _buildThemeItem(uploadedImageUrls),
-        },
+      _creationCompleted = true;
+      unawaited(
+        Get.offNamed(
+          Routes.WATCH_THEME_CUSTOM_PREVIEW,
+          arguments: {
+            'theme': createdTheme ?? _buildThemeItem(uploadedImageUrls),
+          },
+        ),
       );
+      return;
     } catch (_) {
       AppToast.show('创建表盘失败，请重试');
     } finally {

@@ -16,7 +16,11 @@ class CreateWatchThemeView extends GetView<CreateWatchThemeController> {
     final topPadding = MediaQuery.paddingOf(context).top + kToolbarHeight;
     return PopScope(
       canPop: false,
-      onPopInvokedWithResult: (_, __) => controller.handleCreateBack(),
+      onPopInvokedWithResult: (didPop, _) {
+        if (!didPop) {
+          controller.handleCreateBack();
+        }
+      },
       child: WatchThemeGradientScaffold(
         title: '创作主题',
         onBack: controller.handleCreateBack,