✨ feat(vscode): 代码阅读「了解一块代码」改成按路径列调用树：结果是几条路径（用户的一种操作一条），每条从入口一路调到后端服务、数据表，跨进程的写明怎么连过去（via），结构用扁平的 nodes 加 parent 连成树、不用递归；侧栏路径下面一层层展开节点，回答里用嵌套列表画树；回答和找的过程里的代码位置写成仓库链接，功能对话页上的链接按找代码用的工作区文件夹检查、打开、悬停；旧格式的结果当没有，栏上方提示打开对话重新找；删功能前先弹模态框确认，说清连带删掉调用树和问答记录，点「删除」才删

vscode/src/codeReader/editor/previewEditor.ts

@@ -17,7 +17,8 @@ import type { BlockFilter } from './blockFilter'
 import type { FoundLocation } from './definitions'
 import type { ChatKind, DefinitionPeek, ExtensionToWebview, LineRange, Occurrence, Reveal, SymbolReference, WebviewToExtension } from './messages'
 import type { TargetSpot } from './openTarget'
-import type { TopSubject } from './pathPreview'
+import type { LinkBase, TopSubject } from './pathPreview'
+import type { RepoEntry } from './repoPath'
 import { realpath } from 'node:fs/promises'
 import { commands, EndOfLine, Position, Range, Uri, window, workspace, WorkspaceEdit } from 'vscode'
 import { logger } from '../../logging/logger'
@@ -49,7 +50,7 @@ import { FIND_CONTEXT } from './findCommands'
 import { NavigationContext, OCCURRENCES_CONTEXT } from './occurrenceNavigation'
 import { occurrencesOf } from './occurrences'
 import { languageOf, linesSpot, openingFor, revealOf } from './openTarget'
-import { PATH_PREVIEW_SCHEME, topSubjectOf } from './pathPreview'
+import { linkBaseOf, PATH_PREVIEW_SCHEME, topSubjectOf } from './pathPreview'
 import { ReferenceTargets } from './referenceTargets'
 import { findRepoSymbol, isRepoImagePath, repoRootOf, resolveRepoEntry } from './repoPath'
 
@@ -950,15 +951,11 @@ class Preview {
     }
   }
 
-  /** 预览里这批仓库路径，哪些文件或目录不在；这批不带路径的引用，各按写在哪块找，哪些找不到、哪些是语言自带的名字（页面当普通文字）。 */
+  /** 预览里这批仓库路径（从哪儿算见 [linkBaseOf]），哪些文件或目录不在；这批不带路径的引用，各按写在哪块找，哪些找不到、哪些是语言自带的名字（页面当普通文字）。 */
   private async checkRepoLinks(id: number, paths: string[], references: SymbolReference[]): Promise<void> {
-    const root = await repoRootOf(this.document.uri.fsPath)
+    const base = await linkBaseOf(this.document.uri)
     const [missing, resolved] = await Promise.all([
-      Promise.all(paths.map(async (rel) => {
-        if (root === undefined || await resolveRepoEntry(root, rel) === undefined)
-          return rel
-        return undefined
-      })),
+      Promise.all(paths.map(async rel => await linkEntry(base, rel) === undefined ? rel : undefined)),
       Promise.all(references.map(async reference => ({ reference, target: await this.resolveSymbolLink(reference) }))),
     ])
     this.post({
@@ -993,13 +990,13 @@ class Preview {
 
   /** 这批仓库图片哪些在。在的带回预览里能直接用的地址；不在、不是图片、跑出仓库的没有地址。 */
   private async checkRepoImages(id: number, paths: string[]): Promise<void> {
-    const root = await repoRootOf(this.document.uri.fsPath)
-    if (root)
-      await this.allowRepoRoot(root)
+    const base = await linkBaseOf(this.document.uri)
     const images = await Promise.all(paths.map(async (rel) => {
-      if (root === undefined || !isRepoImagePath(rel))
+      const place = isRepoImagePath(rel) ? base(rel) : undefined
+      if (!place)
         return { path: rel }
-      const entry = await resolveRepoEntry(root, rel)
+      await this.allowRepoRoot(place.root)
+      const entry = await resolveRepoEntry(place.root, place.rel)
       if (!entry || entry.isDirectory)
         return { path: rel }
       const src = this.panel.webview.asWebviewUri(Uri.file(entry.fsPath)).toString()
@@ -1032,8 +1029,7 @@ class Preview {
       }
       if (rel === undefined)
         return
-      const root = await repoRootOf(this.document.uri.fsPath)
-      const entry = root === undefined ? undefined : await resolveRepoEntry(root, rel)
+      const entry = await linkEntry(await linkBaseOf(this.document.uri), rel)
       if (!entry) {
         this.markRepoLinkBroken(rel)
         return
@@ -1064,8 +1060,7 @@ class Preview {
   private async symbolTarget(rel: string | undefined, symbol: string, block: string | undefined): Promise<ReferenceTarget> {
     if (rel === undefined)
       return this.resolveSymbolLink({ symbol, block })
-    const root = await repoRootOf(this.document.uri.fsPath)
-    const entry = root === undefined ? undefined : await resolveRepoEntry(root, rel)
+    const entry = await linkEntry(await linkBaseOf(this.document.uri), rel)
     return entry && !entry.isDirectory ? this.locateRepoSymbol(Uri.file(entry.fsPath), symbol) : undefined
   }
 
@@ -1167,6 +1162,12 @@ class Preview {
   }
 }
 
+/** 一条仓库链接指到磁盘上的哪个文件或目录，路径按这一页的算法算（见 [linkBaseOf]）；算不出来、不在、跑出根的没有。 */
+async function linkEntry(base: LinkBase, rel: string): Promise<RepoEntry | undefined> {
+  const place = base(rel)
+  return place && resolveRepoEntry(place.root, place.rel)
+}
+
 /** 写回重写好的注释：换掉原来那几行（同块编辑），或在块上面插进新写的几行。 */
 async function writeCommentEdit(document: TextDocument, edit: CommentEdit): Promise<WriteResult> {
   if (edit.kind === 'replace')