✨ feat(vscode): 代码阅读的链式调用卡片：语言插件读链、翻译模板排成起点和步骤

契约加 LanguageAdapter.chain、Translator.chain、RuleContext.chain、PropertyRow.chain、TextTranslation.rows；跨行写或实参里有闭包的链排成卡片，连着同名调用合成一步列出每次实参，注释挂在步骤上，闭包收起、子块挂到那一步（BlockView.step）；Rust 插件读链、标准库常见方法写中文名；挤成一行时另起一行的 . 贴着前面

vscode/src/codeReader/editor/messages.ts

@@ -4,7 +4,7 @@
 
 import type { ClaudeImage } from '../../cc/spawnClaude'
 import type { FileAttribute } from '../attributes'
-import type { BlockSlot, CallTreeTarget, CommentTarget, SourceColors } from '../blockView'
+import type { BlockSlot, CallTreeTarget, ChainSlot, CommentTarget, SourceColors } from '../blockView'
 import type { ContractMiss } from '../callTree/endpoint'
 import type { CallTree } from '../callTree/model'
 import type { BlockAttributes, BlockConcept, KindBadge, Markdown, PreviewTable, PreviewText, PropertyItem, PropertyRow, SourceRange } from '../contract'
@@ -85,6 +85,7 @@ interface PageCardBase {
   commentTarget?: CommentTarget['kind']
   badge?: KindBadge
   slot?: BlockSlot
+  step?: ChainSlot
   callTree?: CallTreeTarget
 }