feat(reader): copy notes as Markdown links

DESIGN.md

@@ -206,9 +206,10 @@ Layout rules:
 - **Motion**: Reuse the existing 150ms color and press feedback. Reduced-motion mode removes the press transform.
 ### NoteShare
 
-- **Structure**: One 40px share action beside `ReadLater`; it uses the browser's native share sheet when available and copies the current note URL otherwise. If `ReadLater` is unavailable, the action keeps the same inline-end placement in its own compact action group.
-- **States**: Default, native share pending, shared, copied, cancelled, clipboard failure, hover, pressed, focus-visible, and disabled. Successful actions swap the share icon to a check for 1.8 seconds; cancellation returns silently to default.
-- **Accessibility**: The button and polite live region use page-localized names and outcomes. The icon is decorative, the control remains keyboard-operable, and whole-note links omit heading fragments so section sharing stays owned by heading permalinks.
+- **Structure**: Two 40px actions beside `ReadLater`: share uses the browser's native share sheet when available and copies the current URL otherwise, while copy creates a portable `[title](<URL>)` Markdown link for notes and documentation. If `ReadLater` is unavailable, both actions keep the same inline-end placement in their own compact group.
+- **States**: Default, native share pending, shared, URL copied, Markdown copied, cancelled, clipboard failure, hover, pressed, focus-visible, and disabled. Each successful action independently swaps its icon to a check for 1.8 seconds; cancellation returns silently to default.
+- **Accessibility**: Both buttons and their polite live regions use page-localized names and outcomes. Icons are decorative, controls remain keyboard-operable, and whole-note links omit heading fragments so section sharing stays owned by heading permalinks.
+- **Formatting**: Markdown titles normalize whitespace and escape square brackets and backslashes. Angle-bracket destinations preserve valid URLs that contain parentheses without changing the note URL.
 - **Motion**: The beui `action-swap` blur/scale mechanism is adapted to the existing 150ms micro token, using a 3px blur and 75% scale only during the icon crossfade. Reduced-motion mode removes blur, scale, and press transforms while preserving the state change.
 
 ## 6. Motion & Interaction

quartz/components/renderPage.tsx

@@ -410,6 +410,9 @@ export function renderPage(
         data-note-share-shared={noteShare.shared}
         data-note-share-copied={noteShare.copied}
         data-note-share-failed={noteShare.failed}
+        data-note-share-copy-markdown={noteShare.copyMarkdown}
+        data-note-share-markdown-copied={noteShare.markdownCopied}
+        data-note-share-markdown-failed={noteShare.markdownFailed}
       >
         {frame.css && <style dangerouslySetInnerHTML={{ __html: frame.css }} />}
         <div id="quartz-root" class="page" data-frame={frame.name}>

quartz/components/scripts/noteShare.test.ts

@@ -3,7 +3,13 @@ import test, { describe } from "node:test"
 import enUs from "../../i18n/locales/en-US"
 import zhCn from "../../i18n/locales/zh-CN"
 import zhTw from "../../i18n/locales/zh-TW"
-import { noteShareScript, shareNote, type NoteSharePlatform } from "./noteShare"
+import {
+  copyMarkdownNoteLink,
+  formatMarkdownNoteLink,
+  noteShareScript,
+  shareNote,
+  type NoteSharePlatform,
+} from "./noteShare"
 
 const note = { title: "A useful note", url: "https://garden.example/note" }
 
@@ -103,6 +109,43 @@ describe("shareNote", () => {
   })
 })
 
+describe("formatMarkdownNoteLink", () => {
+  test("formats a portable Markdown link", () => {
+    assert.equal(formatMarkdownNoteLink(note), "[A useful note](<https://garden.example/note>)")
+  })
+
+  test("normalizes whitespace and escapes Markdown label characters", () => {
+    assert.equal(
+      formatMarkdownNoteLink({
+        title: "  A [useful] \\ note\nfor everyone  ",
+        url: "https://garden.example/a(b)",
+      }),
+      "[A \\[useful\\] \\\\ note for everyone](<https://garden.example/a(b)>)",
+    )
+  })
+})
+
+describe("copyMarkdownNoteLink", () => {
+  test("copies the formatted note link", async () => {
+    const copied: string[] = []
+
+    const outcome = await copyMarkdownNoteLink(async (text) => {
+      copied.push(text)
+    }, note)
+
+    assert.equal(outcome, "copied")
+    assert.deepEqual(copied, ["[A useful note](<https://garden.example/note>)"])
+  })
+
+  test("reports clipboard failures", async () => {
+    const outcome = await copyMarkdownNoteLink(async () => {
+      throw new DOMException("Blocked", "NotAllowedError")
+    }, note)
+
+    assert.equal(outcome, "failed")
+  })
+})
+
 test("note-share browser script compiles", () => {
   // Given
   const compile = () => new Function(noteShareScript)
@@ -115,10 +158,16 @@ test("note-share browser script handles navigation and in-place renders", () =>
   assert.match(noteShareScript, /document\.addEventListener\("nav", initializeNoteShare\)/)
   assert.match(noteShareScript, /document\.addEventListener\("render", initializeNoteShare\)/)
   assert.match(noteShareScript, /window\.addCleanup\(cleanupNoteShare\)/)
+  assert.match(noteShareScript, /button\.dataset\.action = action/)
+  assert.match(noteShareScript, /copyMarkdownNoteLink/)
+  assert.match(noteShareScript, /markdownButton\.focus\(\{ preventScroll: true \}\)/)
 })
 
 test("note-share labels use the central locale catalog", () => {
   assert.equal(enUs.components.noteShare.title, "Share this note")
+  assert.equal(enUs.components.noteShare.copyMarkdown, "Copy as Markdown")
   assert.equal(zhCn.components.noteShare.copied, "笔记链接已复制")
+  assert.equal(zhCn.components.noteShare.markdownCopied, "Markdown 链接已复制")
   assert.equal(zhTw.components.noteShare.shared, "筆記已分享")
+  assert.equal(zhTw.components.noteShare.markdownFailed, "瀏覽器未能複製 Markdown 連結")
 })

quartz/components/scripts/noteShare.ts

@@ -10,6 +10,32 @@ export type NoteShareData = {
   readonly url: string
 }
 
+export type MarkdownLinkCopyOutcome = "copied" | "failed"
+
+export function formatMarkdownNoteLink(data: NoteShareData): string {
+  const title = data.title
+    .replace(/\s+/g, " ")
+    .trim()
+    .replace(/\\/g, "\\\\")
+    .replace(/\[/g, "\\[")
+    .replace(/\]/g, "\\]")
+  const url = data.url.replace(/\\/g, "%5C").replace(/>/g, "%3E")
+  return `[${title}](<${url}>)`
+}
+
+export async function copyMarkdownNoteLink(
+  copy: (text: string) => Promise<void>,
+  data: NoteShareData,
+): Promise<MarkdownLinkCopyOutcome> {
+  try {
+    await copy(formatMarkdownNoteLink(data))
+    return "copied"
+  } catch (error) {
+    if (error instanceof DOMException || error instanceof TypeError) return "failed"
+    throw error
+  }
+}
+
 export async function shareNote(
   platform: NoteSharePlatform,
   data: NoteShareData,
@@ -35,6 +61,8 @@ export async function shareNote(
 
 export const noteShareScript = `
 const shareNote = ${shareNote.toString()}
+const formatMarkdownNoteLink = ${formatMarkdownNoteLink.toString()}
+const copyMarkdownNoteLink = ${copyMarkdownNoteLink.toString()}
 
 function createNoteShareIcon(pathData, className) {
   const namespace = "http://www.w3.org/2000/svg"
@@ -54,9 +82,61 @@ function getNoteShareLabels() {
     noteShareShared: shared,
     noteShareCopied: copied,
     noteShareFailed: failed,
+    noteShareCopyMarkdown: copyMarkdown,
+    noteShareMarkdownCopied: markdownCopied,
+    noteShareMarkdownFailed: markdownFailed,
   } = document.body.dataset
-  if (!title || !shared || !copied || !failed) return undefined
-  return { title, shared, copied, failed }
+  if (
+    !title ||
+    !shared ||
+    !copied ||
+    !failed ||
+    !copyMarkdown ||
+    !markdownCopied ||
+    !markdownFailed
+  ) {
+    return undefined
+  }
+  return { title, shared, copied, failed, copyMarkdown, markdownCopied, markdownFailed }
+}
+
+function createNoteShareButton(label, action, iconPath) {
+  const button = document.createElement("button")
+  button.type = "button"
+  button.className = "note-share-trigger"
+  button.dataset.action = action
+  button.title = label
+  button.setAttribute("aria-label", label)
+  button.append(
+    createNoteShareIcon(iconPath, "note-share-icon-default"),
+    createNoteShareIcon("m5 12 4 4L19 6", "note-share-icon-success"),
+  )
+  return button
+}
+
+function createNoteShareFeedback(button, status, defaultLabel) {
+  let resetTimer = 0
+  const reset = () => {
+    window.clearTimeout(resetTimer)
+    delete button.dataset.state
+    button.title = defaultLabel
+    button.setAttribute("aria-label", defaultLabel)
+    status.textContent = ""
+  }
+  const showSuccess = (message) => {
+    reset()
+    button.dataset.state = "success"
+    button.title = message
+    button.setAttribute("aria-label", message)
+    status.textContent = message
+    resetTimer = window.setTimeout(reset, 1800)
+  }
+  const showFailure = (message) => {
+    reset()
+    status.textContent = message
+  }
+  const cleanup = () => window.clearTimeout(resetTimer)
+  return { reset, showSuccess, showFailure, cleanup }
 }
 
 let cleanupCurrentNoteShare = () => {}
@@ -83,83 +163,106 @@ function initializeNoteShare() {
     anchor.insertAdjacentElement("afterend", root)
   }
 
-  const button = document.createElement("button")
-  button.type = "button"
-  button.className = "note-share-trigger"
-  button.title = labels.title
-  button.setAttribute("aria-label", labels.title)
-  button.append(
-    createNoteShareIcon(
-      "M4 12v7a1 1 0 0 0 1 1h14a1 1 0 0 0 1-1v-7M12 16V3m0 0L7.5 7.5M12 3l4.5 4.5",
-      "note-share-icon-default",
-    ),
-    createNoteShareIcon("m5 12 4 4L19 6", "note-share-icon-success"),
+  const shareButton = createNoteShareButton(
+    labels.title,
+    "share",
+    "M4 12v7a1 1 0 0 0 1 1h14a1 1 0 0 0 1-1v-7M12 16V3m0 0L7.5 7.5M12 3l4.5 4.5",
   )
-  const status = document.createElement("span")
-  status.className = "note-share-status"
-  status.setAttribute("aria-live", "polite")
-  root.prepend(button)
-  root.append(status)
-
-  let resetTimer = 0
-  const resetButton = () => {
-    delete button.dataset.state
-    button.title = labels.title
-    button.setAttribute("aria-label", labels.title)
-    status.textContent = ""
-  }
-  const showSuccess = (message) => {
-    window.clearTimeout(resetTimer)
-    button.dataset.state = "success"
-    button.title = message
-    button.setAttribute("aria-label", message)
-    status.textContent = message
-    resetTimer = window.setTimeout(resetButton, 1800)
+  const markdownButton = createNoteShareButton(
+    labels.copyMarkdown,
+    "markdown",
+    "M8 8h11v11H8zM5 15H4a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1v1",
+  )
+  const createStatus = () => {
+    const status = document.createElement("span")
+    status.className = "note-share-status"
+    status.setAttribute("aria-live", "polite")
+    return status
   }
+  const shareStatus = createStatus()
+  const markdownStatus = createStatus()
+  const shareFeedback = createNoteShareFeedback(shareButton, shareStatus, labels.title)
+  const markdownFeedback = createNoteShareFeedback(
+    markdownButton,
+    markdownStatus,
+    labels.copyMarkdown,
+  )
+  const url = new URL(location.href)
+  url.hash = ""
+  const note = { title, url: url.href }
+  root.prepend(shareButton, markdownButton)
+  root.append(shareStatus, markdownStatus)
+
   const executeShare = async () => {
-    button.disabled = true
+    shareFeedback.reset()
+    shareButton.disabled = true
     const copy = (text) => navigator.clipboard.writeText(text)
     const platform =
       typeof navigator.share === "function"
         ? { share: (data) => navigator.share(data), copy }
         : { copy }
-    const url = new URL(location.href)
-    url.hash = ""
     let outcome
     try {
-      outcome = await shareNote(platform, { title, url: url.href })
+      outcome = await shareNote(platform, note)
     } catch (error) {
       if (!(error instanceof Error)) throw error
       outcome = "failed"
     } finally {
-      button.disabled = false
+      shareButton.disabled = false
     }
 
     switch (outcome) {
       case "shared":
-        showSuccess(labels.shared)
+        shareFeedback.showSuccess(labels.shared)
         break
       case "copied":
-        showSuccess(labels.copied)
+        shareFeedback.showSuccess(labels.copied)
         break
       case "cancelled":
-        resetButton()
+        shareFeedback.reset()
         break
       case "failed":
-        resetButton()
-        status.textContent = labels.failed
+        shareFeedback.showFailure(labels.failed)
         break
     }
   }
-  const handleClick = () => {
+  const executeMarkdownCopy = async () => {
+    markdownFeedback.reset()
+    const shouldRestoreFocus = document.activeElement === markdownButton
+    markdownButton.disabled = true
+    let outcome
+    try {
+      outcome = await copyMarkdownNoteLink((text) => navigator.clipboard.writeText(text), note)
+    } catch (error) {
+      if (!(error instanceof Error)) throw error
+      outcome = "failed"
+    } finally {
+      markdownButton.disabled = false
+      if (shouldRestoreFocus && markdownButton.isConnected) {
+        markdownButton.focus({ preventScroll: true })
+      }
+    }
+
+    if (outcome === "copied") markdownFeedback.showSuccess(labels.markdownCopied)
+    else markdownFeedback.showFailure(labels.markdownFailed)
+  }
+  const handleShareClick = () => {
     void executeShare()
   }
-  button.addEventListener("click", handleClick)
+  const handleMarkdownClick = () => {
+    void executeMarkdownCopy()
+  }
+  shareButton.addEventListener("click", handleShareClick)
+  markdownButton.addEventListener("click", handleMarkdownClick)
   cleanupCurrentNoteShare = () => {
-    window.clearTimeout(resetTimer)
-    button.removeEventListener("click", handleClick)
-    button.remove()
-    status.remove()
+    shareFeedback.cleanup()
+    markdownFeedback.cleanup()
+    shareButton.removeEventListener("click", handleShareClick)
+    markdownButton.removeEventListener("click", handleMarkdownClick)
+    shareButton.remove()
+    markdownButton.remove()
+    shareStatus.remove()
+    markdownStatus.remove()
     if (ownsRoot) root.remove()
     else root.classList.remove("reader-actions")
   }

quartz/i18n/locales/definition.ts

@@ -82,6 +82,9 @@ export interface Translation {
       shared: string
       copied: string
       failed: string
+      copyMarkdown: string
+      markdownCopied: string
+      markdownFailed: string
     }
     explorer: {
       title: string

quartz/i18n/locales/en-US.ts

@@ -79,6 +79,9 @@ export default {
       shared: "Note shared",
       copied: "Note link copied",
       failed: "The browser could not share this note",
+      copyMarkdown: "Copy as Markdown",
+      markdownCopied: "Markdown link copied",
+      markdownFailed: "The browser could not copy the Markdown link",
     },
     explorer: {
       title: "Explorer",

quartz/i18n/locales/zh-CN.ts

@@ -79,6 +79,9 @@ export default {
       shared: "笔记已分享",
       copied: "笔记链接已复制",
       failed: "浏览器未能分享这篇笔记",
+      copyMarkdown: "复制为 Markdown 链接",
+      markdownCopied: "Markdown 链接已复制",
+      markdownFailed: "浏览器未能复制 Markdown 链接",
     },
     explorer: {
       title: "探索",

quartz/i18n/locales/zh-TW.ts

@@ -76,6 +76,9 @@ export default {
       shared: "筆記已分享",
       copied: "筆記連結已複製",
       failed: "瀏覽器未能分享這篇筆記",
+      copyMarkdown: "複製為 Markdown 連結",
+      markdownCopied: "Markdown 連結已複製",
+      markdownFailed: "瀏覽器未能複製 Markdown 連結",
     },
     explorer: {
       title: "探索",