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/paw-print.mjs

@@ -0,0 +1,25 @@
+/**
+ * @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", cy: "4", r: "2", key: "vol9p0" }],
+  ["circle", { cx: "18", cy: "8", r: "2", key: "17gozi" }],
+  ["circle", { cx: "20", cy: "16", r: "2", key: "1v9bxh" }],
+  [
+    "path",
+    {
+      d: "M9 10a5 5 0 0 1 5 5v3.5a3.5 3.5 0 0 1-6.84 1.045Q6.52 17.48 4.46 16.84A3.5 3.5 0 0 1 5.5 10Z",
+      key: "1ydw1z"
+    }
+  ]
+];
+const PawPrint = createLucideIcon("paw-print", __iconNode);
+
+export { __iconNode, PawPrint as default };
+//# sourceMappingURL=paw-print.mjs.map