v0.3.6: 修复文档大纲导航Bug + 新增自动保存功能

Bug修复:
  - 文档大纲点击标题未定位到编辑器内容 (P0)
  - 根因: raw markdown字符偏移 ≠ ProseMirror文档位置
  - 改为通过 view.state.doc.descendants() 遍历节点树,
    按 heading类型名 + level + textContent 三重匹配定位

新增功能:
  - 自动保存 (2秒防抖), 仅对文件标签页生效
  - 状态栏显示 自动/保存中... 指示器

版本同步: package.json / AboutDialog / README 均更新至 v0.3.6

src/renderer/components/OutlinePanel/OutlinePanel.tsx

@@ -36,25 +36,27 @@ export function parseHeadings(markdown: string): Heading[] {
 
 interface OutlinePanelProps {
   headings: Heading[]
-  onNavigate: (pos: number) => void
+  onNavigate: (heading: Heading, index: number) => void
   activeHeadingIndex: number | null
 }
 
 interface OutlineItemProps {
   heading: Heading
+  index: number
   isActive: boolean
-  onNavigate: (pos: number) => void
+  onNavigate: (heading: Heading, index: number) => void
 }
 
 const OutlineItem = memo(function OutlineItem({
   heading,
+  index,
   isActive,
   onNavigate
 }: OutlineItemProps) {
   return (
     <button
       className={`outline-item outline-level-${heading.level}${isActive ? ' active' : ''}`}
-      onClick={() => onNavigate(heading.pos)}
+      onClick={() => onNavigate(heading, index)}
       title={heading.text}
       aria-label={`跳转到标题：${heading.text}`}
       style={{ paddingLeft: `${8 + (heading.level - 1) * 12}px` }}
@@ -85,8 +87,9 @@ export const OutlinePanel = memo(function OutlinePanel({
       <div className="outline-list" role="list" aria-label="标题列表">
         {headings.map((h, i) => (
           <OutlineItem
-            key={`${h.text}-${h.pos}`}
+            key={`${h.text}-${i}`}
             heading={h}
+            index={i}
             isActive={i === activeHeadingIndex}
             onNavigate={onNavigate}
           />