Fix Ashby resume upload and add validation error logging

Ashby wraps file input inside #_systemfield_resume container — search
for the actual input[type="file"] element. Also capture and log
validation errors from the page when submit returns incomplete.

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

lib/apply/generic.mjs

@@ -154,19 +154,29 @@ async function fillAndSubmit(page, job, formFiller, meta, opts) {
       const verifySelector = opts.verifySelector || 'form button[type="submit"]:not([disabled])';
       const postSubmit = await page.evaluate((vs) => {
         const text = (document.body.innerText || '').toLowerCase();
+        // Check for validation errors (red text, error messages)
+        const errorEls = document.querySelectorAll('[class*="error"], [class*="invalid"], [role="alert"]');
+        const validationErrors = Array.from(errorEls)
+          .map(el => el.innerText?.trim())
+          .filter(t => t && t.length < 200)
+          .slice(0, 3);
         return {
           hasSuccess: text.includes('application submitted') || text.includes('successfully applied') ||
             text.includes('thank you') || text.includes('application received') ||
             text.includes('application has been') || text.includes('we received your'),
           hasForm: !!document.querySelector(vs),
+          validationErrors,
         };
-      }, verifySelector).catch(() => ({ hasSuccess: false, hasForm: false }));
+      }, verifySelector).catch(() => ({ hasSuccess: false, hasForm: false, validationErrors: [] }));
 
       if (postSubmit.hasSuccess || !postSubmit.hasForm) {
         return { status: 'submitted', meta };
       }
 
-      return { status: 'incomplete', meta };
+      return {
+        status: 'incomplete', meta,
+        ...(postSubmit.validationErrors?.length && { validation_errors: postSubmit.validationErrors }),
+      };
     }
 
     // Multi-step: Next/Continue