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/star-x.mjs

@@ -0,0 +1,24 @@
+/**
+ * @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: "m15.5 15.5 5 5", key: "1ky94l" }],
+  [
+    "path",
+    {
+      d: "m20.063 11.525 1.777-1.731a.53.53 0 0 0-.294-.905l-5.166-.755a2.1 2.1 0 0 1-1.595-1.16l-2.31-4.68a.53.53 0 0 0-.95.001L9.216 6.974a2.1 2.1 0 0 1-1.597 1.16l-5.165.755a.53.53 0 0 0-.294.906l3.736 3.637a2.1 2.1 0 0 1 .611 1.879l-.88 5.139a.53.53 0 0 0 .769.56l4.617-2.428a2.1 2.1 0 0 1 .987-.243 2 2 0 0 1 .132.004",
+      key: "6uuto3"
+    }
+  ],
+  ["path", { d: "m20.5 15.5-5 5", key: "1w5am3" }]
+];
+const StarX = createLucideIcon("star-x", __iconNode);
+
+export { __iconNode, StarX as default };
+//# sourceMappingURL=star-x.mjs.map