feat(frontend): add API client, layout, and routing

- Create Axios-based API client with sources, jobs, and dashboard endpoints
- Add responsive Layout component with navigation sidebar
- Set up React Router with Dashboard, Backups, and Settings routes
- Configure TanStack Query provider with default options
- Use lucide-react for navigation icons

frontend/node_modules/call-bind/index.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var setFunctionLength = require('set-function-length');
+
+var $defineProperty = require('es-define-property');
+
+var callBindBasic = require('call-bind-apply-helpers');
+var applyBind = require('call-bind-apply-helpers/applyBind');
+
+module.exports = function callBind(originalFunction) {
+	var func = callBindBasic(arguments);
+	var adjustedLength = 1 + originalFunction.length - (arguments.length - 1);
+	return setFunctionLength(
+		func,
+		adjustedLength > 0 ? adjustedLength : 0,
+		true
+	);
+};
+
+if ($defineProperty) {
+	$defineProperty(module.exports, 'apply', { value: applyBind });
+} else {
+	module.exports.apply = applyBind;
+}