🐛 fix(vscode): 代码阅读预览跳到还没打开的文件时停在文件顶上不再发生：新开的预览注释里有仓库图片时，问图片才把仓库根加进 webview 能读的目录，改了选项 VS Code 重新加载页面，第二次 ready 发的文档不带要滚到的那处；页面能读的目录（页面资源、问答图片、这一页仓库链接的各个根及其真实位置）改在装页面之前一次定好，之后不再改选项，LinkBase 带上它算得出的根

vscode/src/codeReader/editor/previewEditor.test.ts

@@ -76,7 +76,7 @@ vi.mock('./repoPath', async importOriginal => ({
   repoRootOf: async () => '/workspace',
   resolveRepoEntry: async (root: string, rel: string) => {
     const fsPath = `${root}/${rel}`
-    const files = ['/workspace/web/a.ts', '/workspace/web/b.ts', '/workspace/docs/notes.txt', '/ws/web/src/app/(main)/page.tsx', '/srv/app/app/routes.py']
+    const files = ['/workspace/web/a.ts', '/workspace/web/b.ts', '/workspace/docs/notes.txt', '/workspace/docs/home.png', '/ws/web/src/app/(main)/page.tsx', '/srv/app/app/routes.py']
     return files.includes(fsPath) ? { fsPath, isDirectory: false } : undefined
   },
 }))
@@ -377,6 +377,27 @@ describe('预览对比什么看这个标签页是从哪儿打开的', () => {
   })
 })
 
+/** 页面眼下能读的本地目录 */
+function readableRoots(page: ReturnType<typeof tab>): unknown[] {
+  return (page.panel.webview.options.localResourceRoots ?? []).map(root => root.fsPath)
+}
+
+describe('页面能读哪些本地目录', () => {
+  it('新开的预览装页面之前就放行仓库根：注释里的图片问到时不再改页面选项，打开时要滚到的那处还在', async () => {
+    const { provider, document } = opening()
+    const page = tab()
+    await provider.open(document.uri as never, { reveal: { line: 1 } }, async () => provider.resolveCustomTextEditor(document as never, page.panel))
+    expect(readableRoots(page)).toContain('/workspace')
+
+    const options = page.panel.webview.options
+    await page.send({ type: 'ready' })
+    await page.send({ type: 'checkRepoImages', id: 1, paths: ['docs/home.png'] })
+    expect(page.panel.webview.options).toBe(options)
+    expect(page.posted()).toContainEqual(expect.objectContaining({ type: 'document', reveal: { line: 1 } }))
+    expect(page.posted()).toContainEqual({ type: 'repoImagesChecked', id: 1, images: [{ path: 'docs/home.png', src: 'file:///workspace/docs/home.png' }] })
+  })
+})
+
 describe('标签页切走时页面留着', () => {
   it('注册时就让页面在标签页切走后留着', () => {
     const { provider } = opening()
@@ -719,7 +740,7 @@ describe('「了解一块代码」对话页上的仓库链接按这个功能找
     const { provider, document } = opening()
     Object.assign(document, { uri: FEATURE_PAGE, fileName: FEATURE_PAGE.fsPath, languageId: 'plaintext', getText: () => '' })
     const page = tab()
-    provider.resolveCustomTextEditor(document as never, page.panel)
+    await provider.resolveCustomTextEditor(document as never, page.panel)
     await page.send({ type: 'ready' })
     page.clear()
     return page
@@ -752,6 +773,16 @@ describe('「了解一块代码」对话页上的仓库链接按这个功能找
     }
   })
 
+  it('页面装好之前就放行这个功能找代码用的各个工作区文件夹', async () => {
+    try {
+      const page = await featurePage([WEB, SERVER])
+      expect(readableRoots(page)).toEqual(expect.arrayContaining(['/ws/web', '/srv/app']))
+    }
+    finally {
+      reset()
+    }
+  })
+
   it('点链接按同一个算法打开文件；带符号的点了、悬停都在那个文件的文档符号里找', async () => {
     try {
       const page = await featurePage([WEB, SERVER])