fix: add error logging to applier, session polling, and job card clicks

- job_applier.mjs: stack traces on per-job and browser-level errors
- session.mjs: log pending status and poll count during session refresh
- linkedin.mjs: log warning when job card click fails instead of silent catch

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

lib/session.mjs

@@ -25,16 +25,19 @@ export async function refreshSession(platform, apiKey, connectionIds = {}) {
   }
 
   // If not immediately successful, poll for up to 30s
+  console.log(`  ⏳ ${platform} session pending (status: ${loginResp.status}), polling...`);
   const start = Date.now();
+  let pollCount = 0;
   while (Date.now() - start < 30000) {
     await new Promise(r => setTimeout(r, 2000));
+    pollCount++;
     const conn = await kernel.auth.connections.retrieve(connectionId);
     if (conn.status === 'SUCCESS') {
-      console.log(`  ✅ ${platform} session refreshed`);
+      console.log(`  ✅ ${platform} session refreshed (after ${pollCount} polls)`);
       return true;
     }
     if (['FAILED', 'EXPIRED', 'CANCELED'].includes(conn.status)) {
-      console.warn(`  ⚠️  ${platform} session refresh failed: ${conn.status}`);
+      console.warn(`  ⚠️  ${platform} session refresh failed: ${conn.status} (after ${pollCount} polls)`);
       return false;
     }
   }