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/soup.mjs

@@ -0,0 +1,36 @@
+/**
+ * @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: "M12 21a9 9 0 0 0 9-9H3a9 9 0 0 0 9 9Z", key: "4rw317" }],
+  ["path", { d: "M7 21h10", key: "1b0cd5" }],
+  ["path", { d: "M19.5 12 22 6", key: "shfsr5" }],
+  [
+    "path",
+    {
+      d: "M16.25 3c.27.1.8.53.75 1.36-.06.83-.93 1.2-1 2.02-.05.78.34 1.24.73 1.62",
+      key: "rpc6vp"
+    }
+  ],
+  [
+    "path",
+    {
+      d: "M11.25 3c.27.1.8.53.74 1.36-.05.83-.93 1.2-.98 2.02-.06.78.33 1.24.72 1.62",
+      key: "1lf63m"
+    }
+  ],
+  [
+    "path",
+    { d: "M6.25 3c.27.1.8.53.75 1.36-.06.83-.93 1.2-1 2.02-.05.78.34 1.24.74 1.62", key: "97tijn" }
+  ]
+];
+const Soup = createLucideIcon("soup", __iconNode);
+
+export { __iconNode, Soup as default };
+//# sourceMappingURL=soup.mjs.map