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/egg-fried.mjs

@@ -0,0 +1,23 @@
+/**
+ * @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 = [
+  ["circle", { cx: "11.5", cy: "12.5", r: "3.5", key: "1cl1mi" }],
+  [
+    "path",
+    {
+      d: "M3 8c0-3.5 2.5-6 6.5-6 5 0 4.83 3 7.5 5s5 2 5 6c0 4.5-2.5 6.5-7 6.5-2.5 0-2.5 2.5-6 2.5s-7-2-7-5.5c0-3 1.5-3 1.5-5C3.5 10 3 9 3 8Z",
+      key: "165ef9"
+    }
+  ]
+];
+const EggFried = createLucideIcon("egg-fried", __iconNode);
+
+export { __iconNode, EggFried as default };
+//# sourceMappingURL=egg-fried.mjs.map