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/globe-off.mjs

@@ -0,0 +1,22 @@
+/**
+ * @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: "M10.114 4.462A14.5 14.5 0 0 1 12 2a10 10 0 0 1 9.313 13.643", key: "1jq2r7" }],
+  ["path", { d: "M15.557 15.556A14.5 14.5 0 0 1 12 22 10 10 0 0 1 4.929 4.929", key: "1ohfya" }],
+  ["path", { d: "M15.892 10.234A14.5 14.5 0 0 0 12 2a10 10 0 0 0-3.643.687", key: "1fyh9w" }],
+  ["path", { d: "M17.656 12H22", key: "1ttse4" }],
+  ["path", { d: "M19.071 19.071A10 10 0 0 1 12 22 14.5 14.5 0 0 1 8.44 8.45", key: "rmtjzo" }],
+  ["path", { d: "M2 12h10", key: "19562f" }],
+  ["path", { d: "m2 2 20 20", key: "1ooewy" }]
+];
+const GlobeOff = createLucideIcon("globe-off", __iconNode);
+
+export { __iconNode, GlobeOff as default };
+//# sourceMappingURL=globe-off.mjs.map