diff --git a/rust/crates/mnote-web/src/ssr/pages/layout.rs b/rust/crates/mnote-web/src/ssr/pages/layout.rs
index 6b2f8436..04acbef0 100644
--- a/rust/crates/mnote-web/src/ssr/pages/layout.rs
+++ b/rust/crates/mnote-web/src/ssr/pages/layout.rs
@@ -78,7 +78,8 @@ const SIDEBAR_TREE_JS: &str = r##"
   };
 
   function closestAction(target, selector) {
-    return target && typeof target.closest === 'function' ? target.closest(selector) : null;
+    var node = target && target.nodeType === Node.TEXT_NODE ? target.parentElement : target;
+    return node && typeof node.closest === 'function' ? node.closest(selector) : null;
   }
 
   function toggleWorkspaceSidebar(trigger) {
@@ -7135,6 +7136,21 @@ const SIDEBAR_TREE_JS: &str = r##"
     }
   }
 
+  function localFileOpenPathFromHref(href) {
+    try {
+      var url = new URL(String(href || ''), window.location.origin);
+      if (url.pathname !== '/api/local-folder/files/open') return '';
+      return String(url.searchParams.get('path') || '').trim();
+    } catch (_) {
+      return '';
+    }
+  }
+
+  function fileNameFromPath(path) {
+    var value = String(path || '').trim();
+    return value.indexOf('/') >= 0 ? value.split('/').pop() : value;
+  }
+
   function isOnlyOfficeAttachmentHref(href) {
     try {
       var url = new URL(String(href || ''), window.location.origin);
@@ -7169,9 +7185,10 @@ const SIDEBAR_TREE_JS: &str = r##"
   function detailFromEditorAttachmentLink(link) {
     var rawHref = link instanceof HTMLAnchorElement ? link.href : '';
     var params = attachmentQueryParams(rawHref);
-    var fileName = params.get('fileName') || (link ? link.textContent : '') || '未命名附件';
+    var localFilePath = localFileOpenPathFromHref(rawHref);
+    var fileName = params.get('fileName') || fileNameFromPath(localFilePath) || (link ? link.textContent : '') || '未命名附件';
     var fileType = params.get('fileType') || inferOnlyOfficeFileType(fileName, '');
-    var assetId = params.get('assetId') || (link ? link.getAttribute('data-asset-id') : '') || '';
+    var assetId = params.get('assetId') || (link ? link.getAttribute('data-asset-id') : '') || (localFilePath ? 'local-file:' + localFilePath : '');
     var fileUrl = params.get('fileUrl') || '';
     var href = rawHref;
     if (!isOnlyOfficeAttachmentHref(rawHref) && fileType) {
@@ -7205,14 +7222,16 @@ const SIDEBAR_TREE_JS: &str = r##"
     if (!(link instanceof HTMLAnchorElement)) return;
     var href = link.getAttribute('href') || '';
     var params = attachmentQueryParams(href);
-    var fileName = params.get('fileName') || link.textContent || '';
+    var localFilePath = localFileOpenPathFromHref(href);
+    var fileName = params.get('fileName') || fileNameFromPath(localFilePath) || link.textContent || '';
     var className = link.getAttribute('class') || '';
     var shouldEnhance = isOnlyOfficeAttachmentHref(href)
       || className.indexOf('mnote-uploaded-attachment-row') >= 0
-      || isOfficeFileName(fileName);
+      || isOfficeFileName(fileName)
+      || Boolean(localFilePath && (isPdfAttachmentFileName(fileName) || isCodeAttachmentFileName(fileName)));
     if (!shouldEnhance) return;
     link.setAttribute('data-mnote-attachment-link', 'true');
-    var assetId = params.get('assetId') || link.getAttribute('data-asset-id') || '';
+    var assetId = params.get('assetId') || link.getAttribute('data-asset-id') || (localFilePath ? 'local-file:' + localFilePath : '');
     if (assetId) link.setAttribute('data-asset-id', assetId);
     if (isOnlyOfficeAttachmentHref(href)) {
       link.setAttribute('href', buildOnlyOfficeOpenPath({
@@ -7458,6 +7477,27 @@ const SIDEBAR_TREE_JS: &str = r##"
   var attachmentObserver = new MutationObserver(function() { enhanceEditorAttachmentLinks(); });
   attachmentObserver.observe(document.documentElement, { childList: true, subtree: true });
 
+  function interceptEditorAttachmentLink(event) {
+    var editorAttachmentLink = closestAction(event.target, '.editor-surface .ProseMirror a[data-mnote-attachment-link="true"], .editor-surface .ProseMirror a.mnote-uploaded-attachment-row');
+    if (!(editorAttachmentLink instanceof HTMLAnchorElement)) return;
+    event.preventDefault();
+    event.stopPropagation();
+    if (typeof event.stopImmediatePropagation === 'function') event.stopImmediatePropagation();
+    openEditorAttachmentLink(editorAttachmentLink);
+  }
+
+  window.addEventListener('mousedown', interceptEditorAttachmentLink, true);
+  window.addEventListener('click', interceptEditorAttachmentLink, true);
+
+  document.addEventListener('click', function(e) {
+    var editorAttachmentLink = closestAction(e.target, '.editor-surface .ProseMirror a[data-mnote-attachment-link="true"], .editor-surface .ProseMirror a.mnote-uploaded-attachment-row');
+    if (!(editorAttachmentLink instanceof HTMLAnchorElement)) return;
+    e.preventDefault();
+    e.stopPropagation();
+    if (typeof e.stopImmediatePropagation === 'function') e.stopImmediatePropagation();
+    openEditorAttachmentLink(editorAttachmentLink);
+  }, true);
+
   document.addEventListener('mouseover', function(event) {
     var link = closestAction(event.target, '.editor-surface .ProseMirror a[data-mnote-attachment-link="true"], .editor-surface .ProseMirror a.mnote-uploaded-attachment-row');
     if (!(link instanceof HTMLAnchorElement)) return;
diff --git a/scripts/task459-local-markdown-attachment-tab-smoke.js b/scripts/task459-local-markdown-attachment-tab-smoke.js
new file mode 100644
index 00000000..45066445
--- /dev/null
+++ b/scripts/task459-local-markdown-attachment-tab-smoke.js
@@ -0,0 +1,134 @@
+#!/usr/bin/env node
+"use strict";
+
+const assert = require("node:assert");
+const fs = require("node:fs");
+const os = require("node:os");
+const path = require("node:path");
+const { chromium } = require("playwright");
+
+const BASE_URL = (process.env.MNOTE_WEB_SMOKE_BASE_URL || "http://127.0.0.1:3000").replace(/\/+$/, "");
+const UI_TIMEOUT_MS = Number(process.env.MNOTE_SMOKE_UI_TIMEOUT_MS || 30_000);
+const CHROMIUM_EXECUTABLE_PATH = process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH
+  || ["/usr/bin/google-chrome-stable", "/usr/bin/google-chrome", "/snap/bin/chromium"]
+    .find((candidate) => fs.existsSync(candidate));
+
+function fileUrl(localPath) {
+  return `file://${localPath}`;
+}
+
+function localMdDocumentId(relativePath) {
+  return `local-md:${relativePath.replaceAll("/", "~2F")}`;
+}
+
+function documentUrl(root, relativePath) {
+  const url = new URL(`${BASE_URL}/documents/${encodeURIComponent(localMdDocumentId(relativePath))}`);
+  url.searchParams.set("sourceKind", "local_folder");
+  url.searchParams.set("rootUri", fileUrl(root));
+  url.searchParams.set("treeView", "filetree");
+  return url.toString();
+}
+
+function writeWorkspaceManifest(root, ownerId) {
+  const metadataDir = path.join(root, ".mnote");
+  fs.mkdirSync(metadataDir, { recursive: true });
+  fs.writeFileSync(
+    path.join(metadataDir, "workspace.json"),
+    `${JSON.stringify({
+      workspaceId: `local-ws:${ownerId}:task459`,
+      ownerId,
+      createdAt: new Date().toISOString(),
+      capabilities: ["local_files", "markdown_edit", "asset_upload"],
+    }, null, 2)}\n`,
+    "utf8",
+  );
+}
+
+async function quickLogin(page) {
+  await page.goto(`${BASE_URL}/auth`, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
+  const quickLoginButton = page.getByRole("button", { name: "测试账号快速登录" });
+  if (await quickLoginButton.count()) {
+    await quickLoginButton.click({ timeout: UI_TIMEOUT_MS });
+    await page.waitForURL((url) => url.pathname === "/", { timeout: UI_TIMEOUT_MS }).catch(() => undefined);
+  }
+}
+
+async function main() {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), "mnote-task459-md-attachment-"));
+  const relativePath = "README.md";
+  const documentId = localMdDocumentId(relativePath);
+  writeWorkspaceManifest(root, "user_real");
+  fs.mkdirSync(path.join(root, "README"), { recursive: true });
+  fs.writeFileSync(
+    path.join(root, relativePath),
+    [
+      "---",
+      "title: MD Attachment",
+      "---",
+      "",
+      "# MD Attachment",
+      "",
+      "[resource-note.md](README/resource-note.md)",
+      "",
+    ].join("\n"),
+    "utf8",
+  );
+  fs.writeFileSync(path.join(root, "README", "resource-note.md"), "# Resource Note\n\n资源正文\n", "utf8");
+
+  const browser = await chromium.launch({
+    headless: process.env.HEADFUL !== "1",
+    executablePath: CHROMIUM_EXECUTABLE_PATH,
+  });
+  const context = await browser.newContext({
+    viewport: { width: 1360, height: 900 },
+    extraHTTPHeaders: {
+      "x-mnote-actor-id": "user_real",
+      "x-mnote-actor-type": "user",
+    },
+  });
+  const page = await context.newPage();
+  const popups = [];
+  page.on("popup", (popup) => popups.push(popup));
+  try {
+    await quickLogin(page);
+    await page.goto(documentUrl(root, relativePath), { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
+    await page.locator(".document-pane[data-pane-role=\"primary\"] .editor-surface .ProseMirror").first().waitFor({
+      state: "visible",
+      timeout: UI_TIMEOUT_MS,
+    });
+    const link = page.locator('.document-pane[data-pane-role="primary"] .editor-surface .ProseMirror a[href*="/api/local-folder/files/open"][href*="README%2Fresource-note.md"]').first();
+    await link.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
+    await page.waitForFunction(() => {
+      const node = document.querySelector('.document-pane[data-pane-role="primary"] .editor-surface .ProseMirror a[href*="/api/local-folder/files/open"][href*="README%2Fresource-note.md"]');
+      return node && node.classList.contains("mnote-uploaded-attachment-row") && node.getAttribute("data-mnote-attachment-link") === "true";
+    }, null, { timeout: UI_TIMEOUT_MS });
+
+    await link.click({ timeout: UI_TIMEOUT_MS });
+    await page.locator('[data-testid="mnote-resource-tab-host"]:not([hidden])').waitFor({
+      state: "visible",
+      timeout: UI_TIMEOUT_MS,
+    });
+    await page.locator('.mnote-main-tab.is-active[data-mnote-tab-kind="markdown"]').waitFor({
+      state: "visible",
+      timeout: UI_TIMEOUT_MS,
+    });
+    const resourceEditor = page.locator('.mnote-resource-tab-panel:not([hidden]) .editor-surface .ProseMirror[contenteditable="true"]').first();
+    await resourceEditor.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
+    const resourceText = await resourceEditor.innerText({ timeout: UI_TIMEOUT_MS });
+    assert(resourceText.includes("资源正文"), `MD 附件应在资源 tab 中用 tiptap 打开：${resourceText}`);
+    assert.equal(popups.length, 0, `点击 MD 附件不应打开浏览器新窗口，实际 popup=${popups.length}`);
+    const pageText = await page.locator('.document-pane[data-pane-role="primary"] .editor-surface .ProseMirror').first().innerText({
+      timeout: UI_TIMEOUT_MS,
+    });
+    assert(pageText.includes("resource-note.md"), "主页面正文应保持原附件链接");
+    console.log(JSON.stringify({ ok: true, root, documentId, popups: popups.length }, null, 2));
+  } finally {
+    await context.close().catch(() => undefined);
+    await browser.close().catch(() => undefined);
+  }
+}
+
+main().catch((error) => {
+  console.error(error && error.stack ? error.stack : error);
+  process.exit(1);
+});