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/@babel/generator/lib/nodes.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.generatorInfosMap = void 0;
+var generatorFunctions = require("./generators/index.js");
+var deprecatedGeneratorFunctions = require("./generators/deprecated.js");
+const generatorInfosMap = exports.generatorInfosMap = new Map();
+let index = 0;
+for (const key of Object.keys(generatorFunctions).sort()) {
+  if (key.startsWith("_")) continue;
+  generatorInfosMap.set(key, [generatorFunctions[key], index++, undefined]);
+}
+for (const key of Object.keys(deprecatedGeneratorFunctions)) {
+  generatorInfosMap.set(key, [deprecatedGeneratorFunctions[key], index++, undefined]);
+}
+
+//# sourceMappingURL=nodes.js.map