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/text-wrap.mjs

@@ -0,0 +1,19 @@
+/**
+ * @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: "m16 16-3 3 3 3", key: "117b85" }],
+  ["path", { d: "M3 12h14.5a1 1 0 0 1 0 7H13", key: "18xa6z" }],
+  ["path", { d: "M3 19h6", key: "1ygdsz" }],
+  ["path", { d: "M3 5h18", key: "1u36vt" }]
+];
+const TextWrap = createLucideIcon("text-wrap", __iconNode);
+
+export { __iconNode, TextWrap as default };
+//# sourceMappingURL=text-wrap.mjs.map