diff --git a/apps/desktop/package.json b/apps/desktop/package.json
index b173acf..7b100f9 100644
--- a/apps/desktop/package.json
+++ b/apps/desktop/package.json
@@ -18,7 +18,7 @@
     ],
     "asar": true,
     "win": {
-      "target": "dir"
+      "target": ["nsis", "dir"]
     },
     "nsis": {
       "oneClick": false,
diff --git a/apps/desktop/src/renderer/features/editor/CodeBlockView.tsx b/apps/desktop/src/renderer/features/editor/CodeBlockView.tsx
index f6b56b8..f617497 100644
--- a/apps/desktop/src/renderer/features/editor/CodeBlockView.tsx
+++ b/apps/desktop/src/renderer/features/editor/CodeBlockView.tsx
@@ -1,4 +1,5 @@
 import { NodeViewWrapper, NodeViewContent, type NodeViewProps } from '@tiptap/react';
+import { useState } from 'react';
 
 // FR-E5 代码块语言切换：代码块顶部语言下拉（Shell/YAML/JSON/JS/TS/Python 等）
 const LANGS: { label: string; value: string }[] = [
@@ -28,9 +29,42 @@ const LANGS: { label: string; value: string }[] = [
 export function CodeBlockView({ node, updateAttributes, selected }: NodeViewProps) {
   const language = (node.attrs.language as string) || '';
   const codeClass = language ? `language-${language} hljs` : 'hljs';
+  const [copied, setCopied] = useState(false);
+  // FR-E5 扩展：复制时携带 Markdown 代码围栏（```language），方便粘贴到其他 Markdown 应用
+  const copyWithFence = async () => {
+    const code = node.textContent ?? '';
+    const lang = language && language !== 'plaintext' ? language : '';
+    const text = lang ? '```' + lang + '\n' + code + '\n```' : '```\n' + code + '\n```';
+    try {
+      await navigator.clipboard.writeText(text);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1500);
+    } catch {
+      // 剪贴板不可用时回退到 execCommand
+      try {
+        const ta = document.createElement('textarea');
+        ta.value = text;
+        ta.style.position = 'fixed';
+        ta.style.opacity = '0';
+        document.body.appendChild(ta);
+        ta.select();
+        document.execCommand('copy');
+        document.body.removeChild(ta);
+        setCopied(true);
+        setTimeout(() => setCopied(false), 1500);
+      } catch { /* 忽略 */ }
+    }
+  };
   return (
     <NodeViewWrapper as="div" style={{ background: 'var(--bg-secondary)', borderRadius: 6, margin: '0.6em 0', overflow: 'hidden', outline: selected ? '1px solid #4a6a8a' : 'none' }}>
-      <div contentEditable={false} style={{ display: 'flex', justifyContent: 'flex-end', padding: '4px 8px', borderBottom: '1px solid var(--control-border)' }}>
+      <div contentEditable={false} style={{ display: 'flex', justifyContent: 'flex-end', alignItems: 'center', gap: 8, padding: '4px 8px', borderBottom: '1px solid var(--control-border)' }}>
+        <button
+          onClick={() => void copyWithFence()}
+          title="复制（携带 Markdown 代码围栏 ```language）"
+          style={{ border: 'none', background: 'transparent', color: copied ? 'var(--accent-text)' : 'var(--text-tertiary)', cursor: 'pointer', fontSize: 12, padding: '1px 4px', borderRadius: 4 }}
+          onMouseEnter={e => { if (!copied) e.currentTarget.style.background = 'var(--control-border)'; }}
+          onMouseLeave={e => { e.currentTarget.style.background = 'transparent'; }}
+        >{copied ? '✓ 已复制' : '复制'}</button>
         <select
           value={language || 'plaintext'}
           onChange={e => updateAttributes({ language: e.target.value })}
diff --git a/apps/desktop/src/renderer/features/editor/TiptapEditor.tsx b/apps/desktop/src/renderer/features/editor/TiptapEditor.tsx
index bac14a4..1a77db4 100644
--- a/apps/desktop/src/renderer/features/editor/TiptapEditor.tsx
+++ b/apps/desktop/src/renderer/features/editor/TiptapEditor.tsx
@@ -119,6 +119,31 @@ export function TiptapEditor() {
     skipUpdate.current = false;
   }, [currentPath, editor]);
 
+  // FR-E13：长文档底部书写——光标行距编辑区底部保持留白，避免输入内容贴着页面底缘
+  useEffect(() => {
+    if (!editor) return;
+    const BOTTOM_MARGIN = 72; // 光标行距底部的期望留白（px）
+    const adjust = () => {
+      // 编辑器销毁/未挂载时 view 访问会抛异常——必须 try/catch 保护，避免关闭标签后界面报错
+      try {
+        const dom = editor.view.dom as HTMLElement;
+        const scroller = dom.parentElement as HTMLElement | null;
+        if (!scroller) return;
+        const st = getComputedStyle(scroller);
+        if (st.overflowY !== 'auto' && st.overflowY !== 'scroll') return;
+        const sel = editor.view.state.selection;
+        if (!sel.empty) return;
+        const caret = editor.view.coordsAtPos(sel.from);
+        const rect = scroller.getBoundingClientRect();
+        const delta = caret.bottom - (rect.bottom - BOTTOM_MARGIN);
+        if (delta > 0) scroller.scrollTop += delta;
+      } catch { /* 编辑器销毁等异常：忽略 */ }
+    };
+    editor.on('update', adjust);
+    editor.on('selectionUpdate', adjust);
+    return () => { editor.off('update', adjust); editor.off('selectionUpdate', adjust); };
+  }, [editor]);
+
   // 监听保存前冲刷——Ctrl+S / 关窗前同步编辑器内容到 store
   useEffect(() => {
     if (!editor) return;
diff --git a/apps/desktop/src/renderer/features/file-tree/FileTree.tsx b/apps/desktop/src/renderer/features/file-tree/FileTree.tsx
index 0d3105f..3e70a4d 100644
--- a/apps/desktop/src/renderer/features/file-tree/FileTree.tsx
+++ b/apps/desktop/src/renderer/features/file-tree/FileTree.tsx
@@ -106,9 +106,9 @@ export function FileTree() {
     const isDragOver = dragOver === n.path;
     return (
       <div key={n.path}>
-        <div style={{ ...pad, display: 'flex', alignItems: 'center', cursor: 'pointer',
+        <div style={{ padding: '3px 4px', ...pad, display: 'flex', alignItems: 'center', cursor: 'pointer',
             background: currentPath === n.path ? 'var(--control-border)' : (isDragOver ? 'var(--control-border)' : 'transparent'),
-            padding: '3px 4px', borderRadius: 4, position: 'relative' }}
+            borderRadius: 4, position: 'relative' }}
           onMouseEnter={() => setHover(n.path)} onMouseLeave={() => setHover(null)}
           onClick={() => isRenaming ? null : (n.type === 'folder' ? toggle(n.path) : openDoc(n.path))}
           onContextMenu={e => { e.preventDefault(); setMenu({ path: n.path, x: e.clientX, y: e.clientY }); }}
@@ -117,7 +117,12 @@ export function FileTree() {
           onDragOver={e => { if (n.type === 'folder') { e.preventDefault(); setDragOver(n.path); } }}
           onDragLeave={() => setDragOver(null)}
           onDrop={e => n.type === 'folder' && onDrop(e, n.path)}>
-          <span style={{ width: 14 }}>{n.type === 'folder' ? (isCollapsed ? '▶' : '▼') : '◉'}</span>
+          <span style={{ width: 16, display: 'flex', alignItems: 'center', justifyContent: 'center', flexShrink: 0, color: 'var(--text-tertiary)' }}>
+            {n.type === 'folder' ? (isCollapsed ? <ChevronRight /> : <ChevronDown />) : <span style={{ width: 16 }} />}
+          </span>
+          <span style={{ width: 18, display: 'flex', alignItems: 'center', justifyContent: 'center', flexShrink: 0 }}>
+            {n.type === 'folder' ? <FolderIcon open={!isCollapsed} /> : <FileIcon />}
+          </span>
           {isRenaming ? (
             <input autoFocus value={renameVal} onChange={e => setRenameVal(e.target.value)}
               onKeyDown={e => { if (e.key === 'Enter') { setRenaming(null); invoke(IPC.fileRename, { from: n.path, toName: renameVal }).then(r => { useTabs.getState().renamePath(n.path, r.path); syncCurrentPath(n.path, r.path); loadTree(); }); } if (e.key === 'Escape') setRenaming(null); }}
@@ -168,4 +173,39 @@ const miniBtn: React.CSSProperties = { border: 'none', background: 'transparent'
 
 function MenuItem({ children, onClick, danger }: { children: React.ReactNode; onClick: () => void; danger?: boolean }) {
   return <div onClick={onClick} style={{ padding: '5px 10px', cursor: 'pointer', borderRadius: 4, fontSize: 13, color: danger ? '#f88' : 'var(--text-primary)' }} onMouseEnter={e => (e.currentTarget.style.background = 'var(--control-border)')} onMouseLeave={e => (e.currentTarget.style.background = 'transparent')}>{children}</div>;
+}
+
+// ---- 文件树图标（SVG，跟随主题颜色）----
+function ChevronRight() {
+  return (
+    <svg width="10" height="10" viewBox="0 0 10 10" style={{ display: 'block' }}>
+      <path d="M3 1l4 4-4 4" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" />
+    </svg>
+  );
+}
+function ChevronDown() {
+  return (
+    <svg width="10" height="10" viewBox="0 0 10 10" style={{ display: 'block' }}>
+      <path d="M1 3l4 4 4-4" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" />
+    </svg>
+  );
+}
+function FolderIcon({ open }: { open: boolean }) {
+  return (
+    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" style={{ display: 'block', color: 'var(--text-secondary)' }}>
+      {open ? (
+        <path d="M3 6.5A1.5 1.5 0 0 1 4.5 5h5l2 2h8A1.5 1.5 0 0 1 21 8.5v9A1.5 1.5 0 0 1 19.5 19h-15A1.5 1.5 0 0 1 3 17.5v-11z" fill="currentColor" opacity="0.32" stroke="currentColor" strokeWidth="1.3" />
+      ) : (
+        <path d="M3 6.5A1.5 1.5 0 0 1 4.5 5h5l2 2h8A1.5 1.5 0 0 1 21 8.5v9A1.5 1.5 0 0 1 19.5 19h-15A1.5 1.5 0 0 1 3 17.5v-11z" fill="currentColor" opacity="0.4" stroke="currentColor" strokeWidth="1.3" />
+      )}
+    </svg>
+  );
+}
+function FileIcon() {
+  return (
+    <svg width="14" height="15" viewBox="0 0 24 24" fill="none" style={{ display: 'block', color: 'var(--text-secondary)' }}>
+      <path d="M6 3h9l4 4v14H6V3z" fill="currentColor" opacity="0.18" stroke="currentColor" strokeWidth="1.3" strokeLinejoin="round" />
+      <path d="M9 12.5h7M9 16h7" stroke="currentColor" strokeWidth="1.4" strokeLinecap="round" opacity="0.8" />
+    </svg>
+  );
 }
\ No newline at end of file
diff --git a/apps/desktop/src/renderer/features/outline/OutlinePanel.tsx b/apps/desktop/src/renderer/features/outline/OutlinePanel.tsx
index 51b71eb..3a530a9 100644
--- a/apps/desktop/src/renderer/features/outline/OutlinePanel.tsx
+++ b/apps/desktop/src/renderer/features/outline/OutlinePanel.tsx
@@ -35,7 +35,12 @@ export function OutlinePanel() {
   const activeRef = useRef(-1);
   useEffect(() => {
     if (!editor || headings.length === 0) return;
-    const dom = editor.view.dom as HTMLElement;
+    let dom: HTMLElement;
+    try {
+      dom = editor.view.dom as HTMLElement;
+    } catch {
+      return; // 编辑器已销毁/未挂载——关闭标签后不抛错
+    }
     // 找到可滚动父容器
     let scrollEl: HTMLElement | null = dom.parentElement;
     while (scrollEl && getComputedStyle(scrollEl).overflowY !== 'auto' && getComputedStyle(scrollEl).overflowY !== 'scroll') {
@@ -51,11 +56,13 @@ export function OutlinePanel() {
       requestAnimationFrame(() => {
         const containerTop = scrollEl!.getBoundingClientRect().top;
         let current = 0;
-        for (let i = 0; i < headings.length; i++) {
-          const coords = editor!.view.coordsAtPos(headings[i].pos + 1);
-          if (coords.top - containerTop <= 100) current = i;
-          else break;
-        }
+        try {
+          for (let i = 0; i < headings.length; i++) {
+            const coords = editor!.view.coordsAtPos(headings[i].pos + 1);
+            if (coords.top - containerTop <= 100) current = i;
+            else break;
+          }
+        } catch { /* 编辑器销毁后滚动事件忽略 */ }
         if (current !== activeRef.current) {
           activeRef.current = current;
           setActiveIdx(current);
@@ -74,7 +81,10 @@ export function OutlinePanel() {
   // 不用 smooth scroll（导航场景应瞬时跳转），不用 editor.commands.focus（会触发 scrollIntoView）
   const scrollTo = useCallback((h: HeadingItem) => {
     if (!editor) return;
-    const el = editor.view.nodeDOM(h.pos) as HTMLElement | null;
+    let el: HTMLElement | null = null;
+    try {
+      el = editor.view.nodeDOM(h.pos) as HTMLElement | null;
+    } catch { return; }
     if (!el) return;
     // 找到编辑器的可滚动父容器
     let scrollEl: HTMLElement | null = el.parentElement;
diff --git a/apps/desktop/src/renderer/styles.css b/apps/desktop/src/renderer/styles.css
index 09042d4..0bf22ea 100644
--- a/apps/desktop/src/renderer/styles.css
+++ b/apps/desktop/src/renderer/styles.css
@@ -13,7 +13,8 @@ html, body, #root { margin: 0; height: 100%; }
   font-family: var(--editor-font-family, Consolas, monospace) !important;
   white-space: var(--editor-white-space, pre-wrap);
   min-height: 100%;
-  padding: 16px 24px;
+  /* 底部加大留白：长文档写到末尾时，光标行不会贴着编辑区底缘（配合光标跟随滚动） */
+  padding: 16px 24px 140px;
   font-family: 'Consolas', 'Source Code Pro', system-ui, sans-serif;
   font-size: 14px;
   line-height: 1.7;
@@ -36,25 +37,27 @@ html, body, #root { margin: 0; height: 100%; }
 /* highlight.js 暗色主题（CodeBlockLowlight 装饰 span，FR-E5） */
 .tiptap-wrap .ProseMirror .hljs { color: #abb2bf; }
 .tiptap-wrap .ProseMirror .hljs-comment, .tiptap-wrap .ProseMirror .hljs-quote { color: #5c6370; font-style: italic; }
-.tiptap-wrap .ProseMirror .hljs-doctag, .tiptap-wrap .ProseMirror .hljs-keyword, .tiptap-wrap .ProseMirror .hljs-formula, .tiptap-wrap .ProseMirror .hljs-name, .tiptap-wrap .ProseMirror .hljs-section, .tiptap-wrap .ProseMirror .hljs-selector-tag, .tiptap-wrap .ProseMirror .hljs-tag { color: #e06c75; }
+.tiptap-wrap .ProseMirror .hljs-doctag, .tiptap-wrap .ProseMirror .hljs-keyword, .tiptap-wrap .ProseMirror .hljs-formula, .tiptap-wrap .ProseMirror .hljs-selector-tag, .tiptap-wrap .ProseMirror .hljs-tag { color: #c678dd; }
+.tiptap-wrap .ProseMirror .hljs-name, .tiptap-wrap .ProseMirror .hljs-section { color: #61afef; }
 .tiptap-wrap .ProseMirror .hljs-addition, .tiptap-wrap .ProseMirror .hljs-attribute, .tiptap-wrap .ProseMirror .hljs-attr, .tiptap-wrap .ProseMirror .hljs-string, .tiptap-wrap .ProseMirror .hljs-template-tag, .tiptap-wrap .ProseMirror .hljs-template-variable, .tiptap-wrap .ProseMirror .hljs-value { color: #98c379; }
 .tiptap-wrap .ProseMirror .hljs-built_in, .tiptap-wrap .ProseMirror .hljs-class .hljs-title, .tiptap-wrap .ProseMirror .hljs-title, .tiptap-wrap .ProseMirror .hljs-title.class_, .tiptap-wrap .ProseMirror .hljs-type { color: #e6c07b; }
 .tiptap-wrap .ProseMirror .hljs-function .hljs-title, .tiptap-wrap .ProseMirror .hljs-title.function_ { color: #61afef; }
 .tiptap-wrap .ProseMirror .hljs-literal, .tiptap-wrap .ProseMirror .hljs-number, .tiptap-wrap .ProseMirror .hljs-operator, .tiptap-wrap .ProseMirror .hljs-variable, .tiptap-wrap .ProseMirror .hljs-params { color: #d19a66; }
 .tiptap-wrap .ProseMirror .hljs-bullet, .tiptap-wrap .ProseMirror .hljs-link, .tiptap-wrap .ProseMirror .hljs-meta, .tiptap-wrap .ProseMirror .hljs-regexp, .tiptap-wrap .ProseMirror .hljs-selector-attr, .tiptap-wrap .ProseMirror .hljs-selector-class, .tiptap-wrap .ProseMirror .hljs-selector-id, .tiptap-wrap .ProseMirror .hljs-symbol, .tiptap-wrap .ProseMirror .hljs-variable.constant_ { color: #56b6c2; }
-.tiptap-wrap .ProseMirror .hljs-deletion { color: #e06c75; }
+.tiptap-wrap .ProseMirror .hljs-deletion { color: #d19a66; }
 .tiptap-wrap .ProseMirror .hljs-emphasis { font-style: italic; }
 .tiptap-wrap .ProseMirror .hljs-strong { font-weight: 700; }
 /* highlight.js 浅色主题——当 --bg-primary 为浅色时生效（latte/daylight/plain） */
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs { color: #24292e; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-comment, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-quote { color: #6a737d; }
-:root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-doctag, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-keyword, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-formula, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-name, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-section, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-selector-tag, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-tag { color: #d73a49; }
+:root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-doctag, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-keyword, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-formula, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-selector-tag, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-tag { color: #8250df; }
+:root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-name, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-section { color: #0969da; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-addition, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-attribute, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-attr, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-string, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-template-tag, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-template-variable, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-value { color: #032f62; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-built_in, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-class .hljs-title, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-title, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-title.class_, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-type { color: #6f42c1; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-function .hljs-title, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-title.function_ { color: #005cc5; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-literal, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-number, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-operator, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-variable, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-params { color: #005cc5; }
 :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-bullet, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-link, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-meta, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-regexp, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-selector-attr, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-selector-class, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-selector-id, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-symbol, :root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-variable.constant_ { color: #005cc5; }
-:root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-deletion { color: #d73a49; }
+:root[data-theme-group="light"] .tiptap-wrap .ProseMirror .hljs-deletion { color: #6a737d; }
 /* FR-E11 查找高亮 */
 .tiptap-wrap .ProseMirror .find-match { background: rgba(255, 213, 79, 0.35); border-radius: 2px; }
 .tiptap-wrap .ProseMirror .find-match-active { background: rgba(255, 145, 0, 0.65); }
diff --git a/apps/desktop/tests/e2e/fix-regression.spec.ts b/apps/desktop/tests/e2e/fix-regression.spec.ts
new file mode 100644
index 0000000..b764bdf
--- /dev/null
+++ b/apps/desktop/tests/e2e/fix-regression.spec.ts
@@ -0,0 +1,144 @@
+import { test, expect } from '@playwright/test';
+import { _electron as electron } from 'playwright';
+import { promises as fs } from 'node:fs';
+import nodePath from 'node:path';
+import os from 'node:os';
+
+const MAIN_JS = nodePath.join(process.cwd(), 'dist-electron/main/index.js');
+
+async function launch(userData: string) {
+  const app = await electron.launch({ args: ['--user-data-dir=' + userData, MAIN_JS] });
+  const page = await app.firstWindow();
+  await page.waitForLoadState('domcontentloaded');
+  await page.waitForTimeout(1000);
+  const invoke = (ch: string, args: any) => page.evaluate(({ ch, args }) => (globalThis as any).dsh.invoke(ch, args), { ch, args });
+  return { app, page, invoke };
+}
+
+// 回归：文件列表缩进逐级递进 + 每行带 SVG 图标（FR-反馈1）
+test('回归：文件列表缩进递进且带图标', async () => {
+  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-reg1-'));
+  const userData = nodePath.join(tmp, 'ud'); const vault = nodePath.join(tmp, 'v');
+  await fs.mkdir(userData, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+  const a = await launch(userData);
+  await a.invoke('vault:switch', { root: vault });
+  await a.invoke('file:create', { basePath: '', name: '一层', isFolder: true });
+  await a.invoke('file:create', { basePath: '一层', name: '二层', isFolder: true });
+  await a.invoke('file:create', { basePath: '一层/二层', name: '深层文档.md', isFolder: false });
+  await a.invoke('file:create', { basePath: '', name: '根文档.md', isFolder: false });
+  await a.page.evaluate(() => (globalThis as any).__STORE__?.getState?.().loadTree());
+  await a.page.waitForTimeout(1200);
+  const rows = await a.page.evaluate(() => {
+    const ft = document.querySelector('[data-testid="filetree"]');
+    const out: { padLeft: string; svgs: number; text: string }[] = [];
+    for (const el of ft?.querySelectorAll('div') ?? []) {
+      const cs = getComputedStyle(el);
+      if (cs.cursor === 'pointer' && cs.position === 'relative') {
+        out.push({ padLeft: cs.paddingLeft, svgs: el.querySelectorAll('svg').length, text: el.textContent.trim().slice(0, 20) });
+      }
+    }
+    return out;
+  });
+  const pad = rows.map(r => parseInt(r.padLeft, 10));
+  // 根文档(0级) vs 一层(0级) vs 二层(1级) vs 深层文档(2级)
+  expect(rows.length).toBeGreaterThanOrEqual(4);
+  const rootPad = pad[0];
+  const deepRow = rows.find(r => r.text.includes('深层文档'));
+  const l2Row = rows.find(r => r.text.includes('二层'));
+  expect(deepRow).toBeTruthy();
+  expect(l2Row).toBeTruthy();
+  expect(parseInt(deepRow!.padLeft, 10)).toBeGreaterThan(parseInt(l2Row!.padLeft, 10));
+  expect(parseInt(l2Row!.padLeft, 10)).toBeGreaterThan(rootPad);
+  // 每个文件夹/文档行都有 SVG 图标
+  for (const r of rows) expect(r.svgs).toBeGreaterThan(0);
+  await a.app.close();
+});
+
+// 回归：代码块复制携带 Markdown 围栏（FR-反馈3）
+test('回归：复制代码块携带 ```language 围栏', async () => {
+  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-reg3-'));
+  const userData = nodePath.join(tmp, 'ud'); const vault = nodePath.join(tmp, 'v');
+  await fs.mkdir(userData, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+  const a = await launch(userData);
+  await a.invoke('vault:switch', { root: vault });
+  const body = '# 复制测试\n\n```bash\necho hello\nls -la\n```';
+  await a.invoke('doc:write', { path: 'copy.md', meta: {}, body });
+  await a.page.evaluate((p: string) => (globalThis as any).__STORE__?.getState?.().openDoc(p), 'copy.md');
+  await a.page.waitForTimeout(1500);
+  // 拦截剪贴板写入
+  await a.page.evaluate(() => {
+    (globalThis as any).__cap = [];
+    navigator.clipboard.writeText = (t: string) => { (globalThis as any).__cap.push(t); return Promise.resolve(); };
+  });
+  const copyBtn = a.page.locator('.ProseMirror button', { hasText: '复制' }).first();
+  await expect(copyBtn).toBeVisible({ timeout: 10000 });
+  await copyBtn.click();
+  await a.page.waitForTimeout(400);
+  const text = await a.page.evaluate(() => (globalThis as any).__cap?.[0] ?? null);
+  expect(text).toBe('```bash\necho hello\nls -la\n```');
+  await a.app.close();
+});
+
+// 回归：长文档底部书写时光标不贴底（FR-反馈4）
+test('回归：长文档底部书写光标距底留白', async () => {
+  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-reg4-'));
+  const userData = nodePath.join(tmp, 'ud'); const vault = nodePath.join(tmp, 'v');
+  await fs.mkdir(userData, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+  const a = await launch(userData);
+  await a.invoke('vault:switch', { root: vault });
+  const paras: string[] = [];
+  for (let i = 1; i <= 600; i++) paras.push('段落 ' + i + ' 内容内容内容内容内容内容内容内容内容内容内容内容内容内容');
+  const body = '# 长文档\n\n' + paras.join('\n\n');
+  await a.invoke('doc:write', { path: 'long.md', meta: {}, body });
+  await a.page.evaluate((p: string) => (globalThis as any).__STORE__?.getState?.().openDoc(p), 'long.md');
+  await a.page.waitForTimeout(1500);
+  const editor = a.page.locator('.ProseMirror');
+  await editor.click();
+  await a.page.keyboard.press('Control+End');
+  await a.page.waitForTimeout(400);
+  await a.page.keyboard.type('底部输入内容');
+  await a.page.waitForTimeout(700);
+  const m = await a.page.evaluate(() => {
+    const prose = document.querySelector('.ProseMirror');
+    const sc = prose?.closest('div[style]') as HTMLElement | null;
+    if (!sc) return null;
+    const rect = sc.getBoundingClientRect();
+    const sel = window.getSelection();
+    const range = sel && sel.rangeCount ? sel.getRangeAt(0) : null;
+    const caret = range ? range.getBoundingClientRect() : null;
+    return caret ? Math.round(rect.bottom - caret.bottom) : null;
+  });
+  expect(m).not.toBeNull();
+  // 光标至少距底部 30px 留白（修复前为 0~5px 贴底）
+  expect(m!).toBeGreaterThanOrEqual(30);
+  await a.app.close();
+});
+
+// 回归：代码块语法高亮不再出现红色（FR-反馈2）
+test('回归：代码块语法高亮无红色', async () => {
+  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-reg2-'));
+  const userData = nodePath.join(tmp, 'ud'); const vault = nodePath.join(tmp, 'v');
+  await fs.mkdir(userData, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+  const a = await launch(userData);
+  await a.invoke('vault:switch', { root: vault });
+  const body = '# 高亮\n\n```bash\ntime for in\n# 中文注释\n```\n\n```markdown\n## 标题\n- 列表项\n```';
+  await a.invoke('doc:write', { path: 'hl.md', meta: {}, body });
+  await a.page.evaluate((p: string) => (globalThis as any).__STORE__?.getState?.().openDoc(p), 'hl.md');
+  await a.page.waitForTimeout(1500);
+  const reds = await a.page.evaluate(() => {
+    const prose = document.querySelector('.ProseMirror');
+    const bad: { cls: string; color: string; text: string }[] = [];
+    for (const el of prose?.querySelectorAll('.hljs-keyword, .hljs-section, .hljs-tag, .hljs-doctag, .hljs-deletion') ?? []) {
+      const c = getComputedStyle(el).color;
+      const mm = c.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)/);
+      if (!mm) continue;
+      const r = +mm[1], g = +mm[2], b = +mm[3];
+      if (r > 130 && r > g * 1.4 && r > b * 1.4) {
+        bad.push({ cls: String(el.className), color: c, text: (el.textContent || '').slice(0, 20) });
+      }
+    }
+    return bad;
+  });
+  expect(reds).toEqual([]);
+  await a.app.close();
+});