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/telescope.mjs

@@ -0,0 +1,34 @@
+/**
+ * @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: "m10.065 12.493-6.18 1.318a.934.934 0 0 1-1.108-.702l-.537-2.15a1.07 1.07 0 0 1 .691-1.265l13.504-4.44",
+      key: "k4qptu"
+    }
+  ],
+  ["path", { d: "m13.56 11.747 4.332-.924", key: "19l80z" }],
+  ["path", { d: "m16 21-3.105-6.21", key: "7oh9d" }],
+  [
+    "path",
+    {
+      d: "M16.485 5.94a2 2 0 0 1 1.455-2.425l1.09-.272a1 1 0 0 1 1.212.727l1.515 6.06a1 1 0 0 1-.727 1.213l-1.09.272a2 2 0 0 1-2.425-1.455z",
+      key: "m7xp4m"
+    }
+  ],
+  ["path", { d: "m6.158 8.633 1.114 4.456", key: "74o979" }],
+  ["path", { d: "m8 21 3.105-6.21", key: "1fvxut" }],
+  ["circle", { cx: "12", cy: "13", r: "2", key: "1c1ljs" }]
+];
+const Telescope = createLucideIcon("telescope", __iconNode);
+
+export { __iconNode, Telescope as default };
+//# sourceMappingURL=telescope.mjs.map