fix: 修复 CommandLoading/TextBuffer mermaid 节点方括号嵌套导致渲染失败

Author: tt-a1i

src/pages/CommandLoading.tsx

@@ -120,7 +120,7 @@ export function CommandLoading() {
  freeze[冻结结果]
  end
 
- output([readonly SlashCommand[]])
+ output(["readonly SlashCommand list"])
 
  BL --> builtin
  FL --> user

src/pages/TextBuffer.tsx

@@ -99,7 +99,7 @@ export function TextBuffer() {
  end
 
  subgraph State["状态结构"]
- LINES["lines: string["]]
+ LINES["lines: string array"]
  CURSOR["cursorRow/cursorCol"]
  UNDO["undoStack/redoStack"]
  CLIP[clipboard]