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/broccoli.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 13a3 3 0 0 1-2.121-5.121", key: "1oqad0" }],
+  [
+    "path",
+    {
+      d: "M15.606 14.204c-3.5 1.5-5.899 4.503-8.899 7.503A1 1 0 0 1 6 22c-2 0-4-2-4-4a1 1 0 0 1 .293-.707c1.911-1.911 3.823-3.578 5.347-5.441",
+      key: "c93qjr"
+    }
+  ],
+  ["path", { d: "M16.573 14.737A4 4 0 0 1 14 11", key: "1ymr17" }],
+  [
+    "path",
+    {
+      d: "M7.14 10.907a4 4 0 1 1 2.756-7.43A4 4 0 0 1 16.7 4.48a2 2 0 0 1 2.82 2.82 4 4 0 0 1 1.002 6.805A4 4 0 1 1 13 16",
+      key: "1kbgad"
+    }
+  ]
+];
+const Broccoli = createLucideIcon("broccoli", __iconNode);
+
+export { __iconNode, Broccoli as default };
+//# sourceMappingURL=broccoli.mjs.map