Add sync error logging, extend error flash, fix unload saves

- Log workforce sync errors to backend stdout so they appear in docker logs
- Extend error flash from 5s to 15s so errors are readable
- Replace sendBeacon (POST-only) with keepalive fetch (PUT) on unload —
  sendBeacon was hitting 404s on all three unload saves

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

frontend/node_modules/lucide-react/dist/esm/icons/fingerprint-pattern.mjs

@@ -0,0 +1,24 @@
+/**
+ * @license lucide-react v1.24.0 - ISC
+ *
+ * This source code is licensed under the ISC license.
+ * See the LICENSE file in the root directory of this source tree.
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const __iconNode = [
+  ["path", { d: "M12 10a2 2 0 0 0-2 2c0 1.02-.1 2.51-.26 4", key: "1nerag" }],
+  ["path", { d: "M14 13.12c0 2.38 0 6.38-1 8.88", key: "o46ks0" }],
+  ["path", { d: "M17.29 21.02c.12-.6.43-2.3.5-3.02", key: "ptglia" }],
+  ["path", { d: "M2 12a10 10 0 0 1 18-6", key: "ydlgp0" }],
+  ["path", { d: "M2 16h.01", key: "1gqxmh" }],
+  ["path", { d: "M21.8 16c.2-2 .131-5.354 0-6", key: "drycrb" }],
+  ["path", { d: "M5 19.5C5.5 18 6 15 6 12a6 6 0 0 1 .34-2", key: "1tidbn" }],
+  ["path", { d: "M8.65 22c.21-.66.45-1.32.57-2", key: "13wd9y" }],
+  ["path", { d: "M9 6.8a6 6 0 0 1 9 5.2v2", key: "1fr1j5" }]
+];
+const FingerprintPattern = createLucideIcon("fingerprint-pattern", __iconNode);
+
+export { __iconNode, FingerprintPattern as default };
+//# sourceMappingURL=fingerprint-pattern.mjs.map