✨ feat(vscode): 构造参数区，改它的和来自能单独打开源码

vscode/src/codeReader/blockView.ts

@@ -289,6 +289,12 @@ export function toBlockViews(
       translate: node => layerTranslator ? layerTranslator.expression(node, layerDocument) : [{ text: node.text, role: 'plain' }],
       doc: node => layerTranslator?.doc(node, layerDocument),
       lookup: layerRules.lookup ?? (() => undefined),
+      snippet: (node) => {
+        const startRow = node.startPosition.row
+        const end = node.endPosition
+        const endRow = end.column === 0 && end.row > startRow ? end.row - 1 : end.row
+        return sourceRows({ startIndex: node.startIndex, endIndex: node.endIndex, startRow, endRow })
+      },
     }
     /** 一行译文，连着摊开实参的表、块的说明（有才有）。 */
     const textView = (block: TextBlock): { translation: PreviewText, table?: PreviewTable, doc?: Markdown } => {