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/bean-off.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: "M9 9c-.64.64-1.521.954-2.402 1.165A6 6 0 0 0 8 22a13.96 13.96 0 0 0 9.9-4.1",
+      key: "bq3udt"
+    }
+  ],
+  ["path", { d: "M10.75 5.093A6 6 0 0 1 22 8c0 2.411-.61 4.68-1.683 6.66", key: "17ccse" }],
+  [
+    "path",
+    {
+      d: "M5.341 10.62a4 4 0 0 0 6.487 1.208M10.62 5.341a4.015 4.015 0 0 1 2.039 2.04",
+      key: "18zqgq"
+    }
+  ],
+  ["line", { x1: "2", x2: "22", y1: "2", y2: "22", key: "a6p6uj" }]
+];
+const BeanOff = createLucideIcon("bean-off", __iconNode);
+
+export { __iconNode, BeanOff as default };
+//# sourceMappingURL=bean-off.mjs.map