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/Icon.mjs

@@ -0,0 +1,48 @@
+"use strict";
+"use client";
+/**
+ * @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 { forwardRef, createElement } from 'react';
+import defaultAttributes from './defaultAttributes.mjs';
+import { hasA11yProp } from './shared/src/utils/hasA11yProp.mjs';
+import { mergeClasses } from './shared/src/utils/mergeClasses.mjs';
+import { useLucideContext } from './context.mjs';
+
+const Icon = forwardRef(
+  ({ color, size, strokeWidth, absoluteStrokeWidth, className = "", children, iconNode, ...rest }, ref) => {
+    const {
+      size: contextSize = 24,
+      strokeWidth: contextStrokeWidth = 2,
+      absoluteStrokeWidth: contextAbsoluteStrokeWidth = false,
+      color: contextColor = "currentColor",
+      className: contextClass = ""
+    } = useLucideContext() ?? {};
+    const calculatedStrokeWidth = absoluteStrokeWidth ?? contextAbsoluteStrokeWidth ? Number(strokeWidth ?? contextStrokeWidth) * 24 / Number(size ?? contextSize) : strokeWidth ?? contextStrokeWidth;
+    return createElement(
+      "svg",
+      {
+        ref,
+        ...defaultAttributes,
+        width: size ?? contextSize ?? defaultAttributes.width,
+        height: size ?? contextSize ?? defaultAttributes.height,
+        stroke: color ?? contextColor,
+        strokeWidth: calculatedStrokeWidth,
+        className: mergeClasses("lucide", contextClass, className),
+        ...!children && !hasA11yProp(rest) && { "aria-hidden": "true" },
+        ...rest
+      },
+      [
+        ...iconNode.map(([tag, attrs]) => createElement(tag, attrs)),
+        ...Array.isArray(children) ? children : [children]
+      ]
+    );
+  }
+);
+
+export { Icon as default };
+//# sourceMappingURL=Icon.mjs.map