修复 UI 编辑器保存失败提示

普通保存异常统一显示固定安全摘要
保留保存冲突专用提示并补充回归测试

Co-authored-by: Junie <junie@jetbrains.com>

apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts

@@ -1040,8 +1040,8 @@ export function useUiEditorSession(
         setSavedStateSignature(snapshotSignature);
       }
       return true;
-    } catch (error) {
-      setSaveError(error instanceof Error ? error.message : String(error));
+    } catch {
+      setSaveError('保存失败，请稍后重试。');
       return false;
     } finally {
       setIsSaving(false);

apps/ai-game-creator-shell/tests/uiEditorPage.test.ts

@@ -549,6 +549,9 @@ describe('UiEditorPage', () => {
     fireEvent.click(await screen.findByRole('button', { name: '仍然保存' }));
 
     expect((await screen.findByRole('alert')).textContent).toContain(
+      '保存失败，请稍后重试。',
+    );
+    expect(screen.getByRole('alert').textContent).not.toContain(
       '临时存储不可用',
     );
     expect(screen.getByRole('button', { name: '保存' })).toBeTruthy();
@@ -558,4 +561,28 @@ describe('UiEditorPage', () => {
     fireEvent.click(await screen.findByRole('button', { name: '仍然保存' }));
     expect(stateStore.save).toHaveBeenCalledTimes(2);
   });
+
+  it('keeps the dedicated message for a save conflict', async () => {
+    const stateStore: UiDesignStateStore = {
+      load: vi.fn().mockResolvedValue(structuredClone(EMPTY_SNAPSHOT)),
+      save: vi.fn().mockResolvedValue({
+        status: 'conflict',
+        currentRevision: 1,
+      }),
+    };
+    render(
+      createElement(UiEditorPage, {
+        projectPath: '/tmp/ui-editor',
+        resourceId: 'ui-resource',
+        stateStore,
+      }),
+    );
+
+    fireEvent.click(await screen.findByRole('button', { name: '保存' }));
+    fireEvent.click(await screen.findByRole('button', { name: '仍然保存' }));
+
+    expect((await screen.findByRole('alert')).textContent).toContain(
+      '资源已在别处更新；请重新加载后再保存。',
+    );
+  });
 });