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/cannabis-off.mjs

@@ -0,0 +1,39 @@
+/**
+ * @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 22v-4c1.5 1.5 3.5 3 6 3 0-1.5-.5-3.5-2-5", key: "1bqfb7" }],
+  [
+    "path",
+    { d: "M13.988 8.327C13.902 6.054 13.365 3.82 12 2a9.3 9.3 0 0 0-1.445 2.9", key: "1p520n" }
+  ],
+  [
+    "path",
+    {
+      d: "M17.375 11.725C18.882 10.53 21 7.841 21 6c-2.324 0-5.08 1.296-6.662 2.684",
+      key: "q2itvb"
+    }
+  ],
+  ["path", { d: "m2 2 20 20", key: "1ooewy" }],
+  [
+    "path",
+    { d: "M21.024 15.378A15 15 0 0 0 22 15c-.426-1.279-2.67-2.557-4.25-2.907", key: "j9amvs" }
+  ],
+  [
+    "path",
+    {
+      d: "M6.995 6.992C5.714 6.4 4.29 6 3 6c0 2 2.5 5 4 6-1.5 0-4.5 1.5-5 3 3.5 1.5 6 1 6 1-1.5 1.5-2 3.5-2 5 2.5 0 4.5-1.5 6-3",
+      key: "8gmd5g"
+    }
+  ]
+];
+const CannabisOff = createLucideIcon("cannabis-off", __iconNode);
+
+export { __iconNode, CannabisOff as default };
+//# sourceMappingURL=cannabis-off.mjs.map