feat: require cover for first project submission

tests/unit/project-publish-action.test.tsx

@@ -63,7 +63,9 @@ async function advancePoll() {
   });
 }
 
-async function submitProjectMetadata() {
+const pngBytes = new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 1]);
+
+async function submitProjectMetadata({ includeCover = true }: { includeCover?: boolean } = {}) {
   fetchCurrentWorksProjectStatusMock.mockRejectedValueOnce(Object.assign(
     new Error('project missing'),
     { statusCode: 404 },
@@ -75,6 +77,17 @@ async function submitProjectMetadata() {
   fireEvent.change(screen.getByLabelText(/发布者姓名/), { target: { value: '小明' } });
   fireEvent.change(screen.getByLabelText(/发布者年龄/), { target: { value: '12' } });
   fireEvent.change(screen.getByLabelText(/项目简介/), { target: { value: '这是一个太空清洁小游戏。' } });
+  if (includeCover) {
+    fireEvent.change(screen.getByLabelText(/项目封面/), {
+      target: { files: [new File([pngBytes], 'space-cover.png', { type: 'image/png' })] },
+    });
+    await act(async () => {
+      await Promise.resolve();
+    });
+    expect(screen.getByText('space-cover.png')).toBeVisible();
+    expect(screen.getByAltText('项目封面预览')).toBeVisible();
+    expect(screen.getByText('重新选择')).toBeVisible();
+  }
   fireEvent.click(screen.getByRole('button', { name: '提交审核' }));
   await act(async () => {
     await Promise.resolve();
@@ -95,7 +108,7 @@ describe('ProjectPublishAction', () => {
     vi.useRealTimers();
   });
 
-  it('creates a new project without a cover and locks after Builder succeeds', async () => {
+  it('creates a new project with a cover DTO and locks after Builder succeeds', async () => {
     fetchCurrentWorksProjectStatusMock.mockResolvedValue(projectStatus('succeeded'));
     render(<ProjectPublishAction project={project} projectType="mini_game" />);
 
@@ -104,7 +117,7 @@ describe('ProjectPublishAction', () => {
     await flushSubmission();
 
     expect(screen.getByTestId('project-publish-status')).toHaveTextContent(
-      '无封面作品与本次构建结果已提交，正在等待平台校验。',
+      '作品封面与本次构建结果已提交，正在等待平台校验。',
     );
 
     expect(publishWorksProjectSourceMock).toHaveBeenCalledWith({
@@ -121,9 +134,12 @@ describe('ProjectPublishAction', () => {
         age_band: null,
         difficulty: null,
       },
+      cover: {
+        fileName: 'space-cover.png',
+        mimeType: 'image/png',
+        dataBase64: 'iVBORw0KGgoB',
+      },
     });
-    expect(screen.queryByLabelText(/项目封面/)).not.toBeInTheDocument();
-    expect(publishWorksProjectSourceMock.mock.calls[0]?.[0]).not.toHaveProperty('cover');
     expect(fetchCurrentWorksProjectStatusMock).toHaveBeenCalledOnce();
 
     await advancePoll();
@@ -133,7 +149,36 @@ describe('ProjectPublishAction', () => {
     );
     expect(fetchCurrentWorksProjectStatusMock).toHaveBeenCalledTimes(2);
     expect(screen.getByRole('button', { name: '已提交，等待运营审核' })).toBeDisabled();
-    expect(screen.getByTestId('project-publish-status')).toHaveTextContent('无封面作品已提交');
+    expect(screen.getByTestId('project-publish-status')).toHaveTextContent('作品与封面已提交');
+  });
+
+  it('blocks first submission until a cover is selected', async () => {
+    render(<ProjectPublishAction project={project} projectType="mini_game" />);
+
+    await submitProjectMetadata({ includeCover: false });
+
+    expect(screen.getByRole('alert')).toHaveTextContent('首次提交必须上传');
+    expect(publishWorksProjectSourceMock).not.toHaveBeenCalled();
+    expect(screen.getByRole('dialog')).toBeVisible();
+  });
+
+  it('rejects unsupported and oversized cover files before confirmation', async () => {
+    fetchCurrentWorksProjectStatusMock.mockRejectedValue(Object.assign(new Error('missing'), { statusCode: 404 }));
+    render(<ProjectPublishAction project={project} projectType="mini_game" />);
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button', { name: '一键提交审核' }));
+      await Promise.resolve();
+    });
+    const input = screen.getByLabelText(/项目封面/);
+
+    fireEvent.change(input, { target: { files: [new File(['text'], 'cover.gif', { type: 'image/gif' })] } });
+    expect(screen.getByRole('alert')).toHaveTextContent('仅支持 PNG、JPEG 或 WebP');
+
+    fireEvent.change(input, {
+      target: { files: [new File([new Uint8Array(10 * 1024 * 1024 + 1)], 'huge.png', { type: 'image/png' })] },
+    });
+    expect(screen.getByRole('alert')).toHaveTextContent('不能超过 10 MiB');
+    expect(publishWorksProjectSourceMock).not.toHaveBeenCalled();
   });
 
   it('shows a friendly Builder failure without raw details', async () => {