继续收口生成页顶部返回按钮

抽出生成页共用返回按钮壳并复用共享图标按钮能力
将自定义世界生成页接入共享返回按钮壳
将汪汪声浪生成页接入共享返回按钮壳并保留禁用态
补充两个生成页返回按钮的样式与交互回归测试

src/components/CustomWorldGenerationView.test.tsx

@@ -1,7 +1,8 @@
 /* @vitest-environment jsdom */
 
+import userEvent from '@testing-library/user-event';
 import { render, screen } from '@testing-library/react';
-import { describe, expect, test } from 'vitest';
+import { describe, expect, test, vi } from 'vitest';
 
 import type { CustomWorldGenerationProgress } from '../../packages/shared/src/contracts/runtime';
 import { CustomWorldGenerationView } from './CustomWorldGenerationView';
@@ -104,6 +105,12 @@ describe('CustomWorldGenerationView', () => {
       expect(
         screen.getByRole('button', { name: '返回创作中心' }).className,
       ).toContain('text-xs');
+      expect(
+        screen.getByRole('button', { name: '返回创作中心' }).className,
+      ).toContain('bg-transparent');
+      expect(
+        screen.getByRole('button', { name: '返回创作中心' }).className,
+      ).toContain('gap-2');
       expect(screen.getByText('世界建设中')).toBeTruthy();
       expect(screen.getByText('世界建设中').className).toContain('text-xs');
       expect(screen.getByText('世界建设中').className).toContain(
@@ -289,4 +296,29 @@ describe('CustomWorldGenerationView', () => {
     expect(screen.queryByText('大鱼吃小鱼题材')).toBeNull();
     expect(screen.getByTestId('generation-page-background-video')).toBeTruthy();
   });
+
+  test('keeps the shared generation back button click behavior', async () => {
+    const user = userEvent.setup();
+    const onBack = vi.fn();
+
+    render(
+      <CustomWorldGenerationView
+        settingText="大鱼吃小鱼题材"
+        progress={createProgress()}
+        isGenerating
+        error={null}
+        onBack={onBack}
+        onEditSetting={() => {}}
+        onRetry={() => {}}
+        backLabel="返回创作中心"
+        settingDescription={null}
+        settingActionLabel={null}
+        progressTitle="大鱼吃小鱼草稿生成进度"
+      />,
+    );
+
+    await user.click(screen.getByRole('button', { name: '返回创作中心' }));
+
+    expect(onBack).toHaveBeenCalledTimes(1);
+  });
 });