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/bone-fracture.mjs

@@ -0,0 +1,33 @@
+/**
+ * @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: "M14 4.5a1 1 0 0 1 5 0 .5.5 0 0 0 .5.5 1 1 0 0 1 0 5c-.81 0-1.8-.7-2.5 0l-1.958 1.957a.15.15 0 0 1-.252-.072l-.493-2.07a.15.15 0 0 0-.111-.112l-2.072-.494a.15.15 0 0 1-.072-.252L14 7c.7-.7 0-1.69 0-2.5",
+      key: "1c7o5b"
+    }
+  ],
+  ["path", { d: "m16 20-1-2", key: "5348lt" }],
+  ["path", { d: "m20 16-2-1", key: "2c7pv5" }],
+  ["path", { d: "m4 8 2 1", key: "rpj1x4" }],
+  ["path", { d: "m8 4 1 2", key: "1r4zbp" }],
+  [
+    "path",
+    {
+      d: "M9.698 14.19a.15.15 0 0 0 .112.112l2.074.489a.15.15 0 0 1 .072.252L10 17c-.7.7 0 1.69 0 2.5a1 1 0 0 1-5 0 .495.495 0 0 0-.5-.5 1 1 0 0 1 0-5c.81 0 1.8.7 2.5 0l1.956-1.957a.15.15 0 0 1 .252.072z",
+      key: "3u61yx"
+    }
+  ]
+];
+const BoneFracture = createLucideIcon("bone-fracture", __iconNode);
+
+export { __iconNode, BoneFracture as default };
+//# sourceMappingURL=bone-fracture.mjs.map