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/soap-dispenser-droplet.mjs

@@ -0,0 +1,31 @@
+/**
+ * @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: "M10.5 2v4", key: "1xt6in" }],
+  ["path", { d: "M14 2H7a2 2 0 0 0-2 2", key: "e6xig3" }],
+  [
+    "path",
+    {
+      d: "M19.29 14.76A6.67 6.67 0 0 1 17 11a6.6 6.6 0 0 1-2.29 3.76c-1.15.92-1.71 2.04-1.71 3.19 0 2.22 1.8 4.05 4 4.05s4-1.83 4-4.05c0-1.16-.57-2.26-1.71-3.19",
+      key: "adq7uc"
+    }
+  ],
+  [
+    "path",
+    {
+      d: "M9.607 21H6a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h7V7a1 1 0 0 0-1-1H9a1 1 0 0 0-1 1v3",
+      key: "t9hm96"
+    }
+  ]
+];
+const SoapDispenserDroplet = createLucideIcon("soap-dispenser-droplet", __iconNode);
+
+export { __iconNode, SoapDispenserDroplet as default };
+//# sourceMappingURL=soap-dispenser-droplet.mjs.map