fix: scope webmention link extraction to post content only

Adds patch-webmention-sender-content-scope.mjs to restrict extractLinks()
to .h-entry .e-content / .e-content / article / main — preventing sidebar,
nav, and footer links from the live-fetched full page from being included.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/patch-webmention-sender-content-scope.mjs

@@ -0,0 +1,75 @@
+/**
+ * Patch @rmdes/indiekit-endpoint-webmention-sender webmention.js to:
+ *
+ * Scope link extraction to the post content area only (.e-content inside
+ * .h-entry, or <article>, or <main>) when processing a full page.
+ * Without this, links from the sidebar, navigation, and footer are included
+ * because the live-fetch patch fetches the full rendered page HTML.
+ *
+ * Falls back to the whole document when no content container is found
+ * (e.g. when processing a stored post body fragment rather than a full page).
+ */
+
+import { access, readFile, writeFile } from "node:fs/promises";
+
+const filePath =
+  "node_modules/@rmdes/indiekit-endpoint-webmention-sender/lib/webmention.js";
+
+const patchMarker = "// [patched:content-scope]";
+
+const originalBlock = `  $("a[href]").each((_, el) => {`;
+
+const newBlock = `  // [patched:content-scope] Scope to post content area only, so that
+  // sidebar/nav/footer links from the live-fetched full page are excluded.
+  const contentRoot =
+    $(".h-entry .e-content").first().length
+      ? $(".h-entry .e-content").first()
+      : $(".e-content").first().length
+      ? $(".e-content").first()
+      : $("article").first().length
+      ? $("article").first()
+      : $("main").first().length
+      ? $("main").first()
+      : null;
+
+  const scope = contentRoot ?? $;
+
+  scope.find("a[href]").each((_, el) => {`;
+
+async function exists(p) {
+  try {
+    await access(p);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+if (!(await exists(filePath))) {
+  console.log("[patch-webmention-sender-content-scope] File not found, skipping");
+  process.exit(0);
+}
+
+const source = await readFile(filePath, "utf8");
+
+if (source.includes(patchMarker)) {
+  console.log("[patch-webmention-sender-content-scope] Already patched");
+  process.exit(0);
+}
+
+if (!source.includes(originalBlock)) {
+  console.warn(
+    "[patch-webmention-sender-content-scope] Target block not found — upstream format may have changed, skipping"
+  );
+  process.exit(0);
+}
+
+const patched = source.replace(originalBlock, newBlock);
+
+if (!patched.includes(patchMarker)) {
+  console.warn("[patch-webmention-sender-content-scope] Patch validation failed, skipping");
+  process.exit(0);
+}
+
+await writeFile(filePath, patched, "utf8");
+console.log("[patch-webmention-sender-content-scope] Patched successfully");