Editor: Find & Replace, read-aloud, backup, typography, phonetic, org niceties

Writer power-ups (Phase 11), plus the selection-bubble vs copy/paste fix.

- Find & Replace (Ctrl/Cmd+F): SearchHighlight decoration extension +
  FindReplace bar (match-case, replace-all back-to-front, scroll without
  popping the selection bubble).
- Read-aloud (Web Speech, offline) on the word card and selection bubble.
- Keyboard/touch access to the ESL helpers: Ctrl/Cmd+D look up word at caret,
  Ctrl/Cmd+J rewrite selection, touch long-press lookup. Refactored the
  right-click handler into a shared openWordLookup(pos).
- Whole-corpus backup: GET /api/docs/export-all zips every doc (md/docx),
  de-dupes filenames, dated name; sidebar download links. TestExportAll.
- Smart typography input rules (curly quotes/em-dash/ellipsis), ASCII-only so
  CJK is untouched.
- Duplicate doc, sidebar sort (Recent/Title/Longest), toolbar outline popover.
- English phonetic (chosen over pinyin for an English learner): ECDICT-built
  phonetic.json.gz (46,579 words) + Result.Phonetic + WordCard IPA line;
  scripts/build_phonetic.py (full build + --seed fallback).
- Selection bubble no longer blocks copy/paste: deferred to pointer-up and made
  click-through except on its buttons.

Claude-Session: https://claude.ai/code/session_016Yr6jELuRc7hyzYLccQKZd

web/src/components/Toolbar/Toolbar.tsx

@@ -167,7 +167,7 @@ function Swatch({
 // the current selection without re-rendering the whole tree on every keystroke.
 export function Toolbar({ editor, onVoiceCheck, voicing }: Props) {
   // Which popover (if any) is open. Only one at a time.
-  const [menu, setMenu] = useState<'color' | 'highlight' | 'size' | 'link' | 'table' | null>(null)
+  const [menu, setMenu] = useState<'color' | 'highlight' | 'size' | 'link' | 'table' | 'outline' | null>(null)
   const [linkUrl, setLinkUrl] = useState('')
   const fileInputRef = useRef<HTMLInputElement>(null)
 
@@ -222,6 +222,26 @@ export function Toolbar({ editor, onVoiceCheck, voicing }: Props) {
     close()
   }
 
+  // Collect the document's headings (with their positions) for the outline. Read
+  // fresh each time the popover opens, so it always reflects the current doc.
+  const headings: { level: number; text: string; pos: number }[] = []
+  if (menu === 'outline') {
+    editor.state.doc.descendants((node, pos) => {
+      if (node.type.name === 'heading') {
+        headings.push({ level: (node.attrs.level as number) || 1, text: node.textContent || '（无标题）', pos })
+      }
+    })
+  }
+
+  // Scroll a heading into view without moving the selection (which would pop the
+  // rewrite bubble). domAtPos resolves the heading's DOM node to scroll to.
+  const gotoHeading = (pos: number) => {
+    const dom = editor.view.domAtPos(pos + 1)
+    const el = dom.node.nodeType === Node.TEXT_NODE ? dom.node.parentElement : (dom.node as HTMLElement)
+    el?.scrollIntoView({ block: 'start', behavior: 'smooth' })
+    close()
+  }
+
   const onPickImage = (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0]
     if (file) uploadImageInto(editor.view, file)
@@ -507,6 +527,50 @@ export function Toolbar({ editor, onVoiceCheck, voicing }: Props) {
           />
         )}
       </Popover>
+
+      {/* Outline / document map */}
+      <Popover
+        open={menu === 'outline'}
+        onClose={close}
+        width={240}
+        trigger={
+          <TBtn label="Outline" active={menu === 'outline'} onClick={() => setMenu(menu === 'outline' ? null : 'outline')}>
+            ☰
+          </TBtn>
+        }
+      >
+        <div className="max-h-72 overflow-y-auto">
+          <p className="mb-1.5 px-1 text-xs font-bold" style={{ color: 'var(--color-muted)' }}>
+            大纲 · Outline
+          </p>
+          {headings.length === 0 ? (
+            <p className="px-1 py-2 text-xs leading-snug" style={{ color: 'var(--color-muted)' }}>
+              用 H1/H2/H3 添加标题，这里就会出现导航。<br />
+              Add headings to navigate them here.
+            </p>
+          ) : (
+            <div className="flex flex-col">
+              {headings.map((h, i) => (
+                <button
+                  key={i}
+                  type="button"
+                  onMouseDown={(e) => e.preventDefault()}
+                  onClick={() => gotoHeading(h.pos)}
+                  className="truncate rounded px-1.5 py-1 text-left text-sm hover:bg-[var(--color-surface-alt)]"
+                  style={{
+                    paddingLeft: `${(h.level - 1) * 12 + 6}px`,
+                    color: 'var(--color-plum)',
+                    fontWeight: h.level === 1 ? 700 : 500,
+                  }}
+                  title={h.text}
+                >
+                  {h.text}
+                </button>
+              ))}
+            </div>
+          )}
+        </div>
+      </Popover>
       <Divider />
 
       <button