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/plugin-transform-function-name/lib/index.js

@@ -0,0 +1,36 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperCompilationTargets = require("@babel/helper-compilation-targets");
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion(7);
+  const supportUnicodeId = !(0, _helperCompilationTargets.isRequired)("transform-unicode-escapes", api.targets());
+  return {
+    name: "transform-function-name",
+    visitor: {
+      FunctionExpression: {
+        exit(path) {
+          if (path.key !== "value" && !path.parentPath.isObjectProperty()) {
+            var _path$ensureFunctionN;
+            (_path$ensureFunctionN = path.ensureFunctionName) != null ? _path$ensureFunctionN : path.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
+            path.ensureFunctionName(supportUnicodeId);
+          }
+        }
+      },
+      ObjectProperty(path) {
+        const value = path.get("value");
+        if (value.isFunction()) {
+          var _value$ensureFunction;
+          (_value$ensureFunction = value.ensureFunctionName) != null ? _value$ensureFunction : value.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
+          value.ensureFunctionName(supportUnicodeId);
+        }
+      }
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map