Add dedicated 'closed' status for listings no longer accepting applications

Distinguishes closed listings from missing apply buttons. Shows in summary
as a separate line item.

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

lib/notify.mjs

@@ -95,7 +95,7 @@ export function formatSearchSummary(added, skipped, platforms) {
 export function formatApplySummary(results) {
   const { submitted, failed, needs_answer, total,
           skipped_recruiter, skipped_external, skipped_no_apply,
-          skipped_other, already_applied, atsCounts } = results;
+          skipped_other, already_applied, closed, atsCounts } = results;
 
   const lines = [
     `✅ *Apply Run Complete* — ${total} jobs processed`,
@@ -106,6 +106,7 @@ export function formatApplySummary(results) {
   // Only show non-zero categories to keep the summary clean
   if (needs_answer) lines.push(`💬 Needs your answer: ${needs_answer}`);
   if (failed) lines.push(`❌ Failed: ${failed}`);
+  if (closed) lines.push(`🚫 Closed: ${closed}`);
   if (skipped_no_apply) lines.push(`⏭️  No apply button: ${skipped_no_apply}`);
   if (skipped_recruiter) lines.push(`🚫 Recruiter-only: ${skipped_recruiter}`);
   if (already_applied) lines.push(`🔁 Already applied: ${already_applied}`);