Show apply_url in summary for external jobs, add Ashby closed detection

External ATS jobs now show their actual apply URL instead of the
LinkedIn listing URL. Also added Ashby-specific "job not found"
text to closed detection.

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

lib/apply/ashby.mjs

@@ -8,6 +8,7 @@ export const SUPPORTED_TYPES = ['ashby'];
 export async function apply(page, job, formFiller) {
   return genericApply(page, job, formFiller, {
     transformUrl: (url) => url.includes('/application') ? url : url.replace(/\/?(\?|$)/, '/application$1'),
+    closedTexts: ['job not found', 'the job you requested was not found'],
     formDetector: '#_systemfield_name',
     applyButtonSelector: 'button:has-text("Apply for this Job"), a:has-text("Apply for this Job")',
     submitSelector: 'button:has-text("Submit Application")',