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/medal.mjs

@@ -0,0 +1,27 @@
+/**
+ * @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: "M7.21 15 2.66 7.14a2 2 0 0 1 .13-2.2L4.4 2.8A2 2 0 0 1 6 2h12a2 2 0 0 1 1.6.8l1.6 2.14a2 2 0 0 1 .14 2.2L16.79 15",
+      key: "143lza"
+    }
+  ],
+  ["path", { d: "M11 12 5.12 2.2", key: "qhuxz6" }],
+  ["path", { d: "m13 12 5.88-9.8", key: "hbye0f" }],
+  ["path", { d: "M8 7h8", key: "i86dvs" }],
+  ["circle", { cx: "12", cy: "17", r: "5", key: "qbz8iq" }],
+  ["path", { d: "M12 18v-2h-.5", key: "fawc4q" }]
+];
+const Medal = createLucideIcon("medal", __iconNode);
+
+export { __iconNode, Medal as default };
+//# sourceMappingURL=medal.mjs.map