✨ feat(vscode): 文件和文件夹在预览顶部问

侧栏「问 AI」打开代码阅读预览。文件夹是没有代码块的一页，源码文件在整页顶部聊，代码块下面的问答不动。历史按工作区文件夹和相对路径记在窗口状态里，不写进按块存的记录。

vscode/src/codeReader/index.ts

@@ -9,6 +9,7 @@ import { shellCommandRules } from './commands/shellCommands'
 import { systemCommandRules } from './commands/systemCommands'
 import { BlockFilter } from './editor/blockFilter'
 import { NEXT_OCCURRENCE, PREVIOUS_OCCURRENCE } from './editor/occurrenceNavigation'
+import { PATH_PREVIEW_SCHEME } from './editor/pathPreview'
 import { PREVIEW_VIEW_TYPE, PreviewEditorProvider } from './editor/previewEditor'
 import { showPreview, showSource } from './editor/switchEditor'
 import { registerCopyCommands } from './explorer/copyCommands'
@@ -82,7 +83,7 @@ export function registerCodeReader(context: ExtensionContext): CodeReaderApi {
     return runtime.parse(adapter, languageId, source)
   }, report))
   const resolve = (reference: RuleReference): Promise<RuleLocation[]> => resolveReference(reference, registry.libraryRules(), indexes, report)
-  const qa = new CodeQa(context.globalState)
+  const qa = new CodeQa(context.globalState, context.workspaceState)
   const namesIn = async (languageId: string, name: string): Promise<IndexedName[]> => {
     const adapter = registry.languageFor(languageId)
     return adapter ? indexedNames((index, key) => indexes.find(index, key), adapter, name) : []
@@ -102,7 +103,16 @@ export function registerCodeReader(context: ExtensionContext): CodeReaderApi {
     indexes,
     registerNoteCommands(notes),
     registerCopyCommands(),
-    registerPathAsk(qa.profiles),
+    registerPathAsk(
+      async (uri) => {
+        const languageId = await languageOf(uri)
+        return languageId !== undefined && registry.languageFor(languageId) !== undefined
+      },
+      uri => previews.openAsking(uri),
+    ),
+    workspace.registerTextDocumentContentProvider(PATH_PREVIEW_SCHEME, {
+      provideTextDocumentContent: () => '',
+    }),
     registry.onDidChange(() => {
       void commands.executeCommand('setContext', LANGUAGE_IDS_CONTEXT, registry.languageIds())
       previews.refresh()