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/salad.mjs

@@ -0,0 +1,26 @@
+/**
+ * @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: "M7 21h10", key: "1b0cd5" }],
+  ["path", { d: "M12 21a9 9 0 0 0 9-9H3a9 9 0 0 0 9 9Z", key: "4rw317" }],
+  [
+    "path",
+    {
+      d: "M11.38 12a2.4 2.4 0 0 1-.4-4.77 2.4 2.4 0 0 1 3.2-2.77 2.4 2.4 0 0 1 3.47-.63 2.4 2.4 0 0 1 3.37 3.37 2.4 2.4 0 0 1-1.1 3.7 2.51 2.51 0 0 1 .03 1.1",
+      key: "10xrj0"
+    }
+  ],
+  ["path", { d: "m13 12 4-4", key: "1hckqy" }],
+  ["path", { d: "M10.9 7.25A3.99 3.99 0 0 0 4 10c0 .73.2 1.41.54 2", key: "1p4srx" }]
+];
+const Salad = createLucideIcon("salad", __iconNode);
+
+export { __iconNode, Salad as default };
+//# sourceMappingURL=salad.mjs.map