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/functions-have-names/index.js

@@ -0,0 +1,31 @@
+'use strict';
+
+var functionsHaveNames = function functionsHaveNames() {
+	return typeof function f() {}.name === 'string';
+};
+
+var gOPD = Object.getOwnPropertyDescriptor;
+if (gOPD) {
+	try {
+		gOPD([], 'length');
+	} catch (e) {
+		// IE 8 has a broken gOPD
+		gOPD = null;
+	}
+}
+
+functionsHaveNames.functionsHaveConfigurableNames = function functionsHaveConfigurableNames() {
+	if (!functionsHaveNames() || !gOPD) {
+		return false;
+	}
+	var desc = gOPD(function () {}, 'name');
+	return !!desc && !!desc.configurable;
+};
+
+var $bind = Function.prototype.bind;
+
+functionsHaveNames.boundFunctionsHaveNames = function boundFunctionsHaveNames() {
+	return functionsHaveNames() && typeof $bind === 'function' && function f() {}.bind().name !== '';
+};
+
+module.exports = functionsHaveNames;