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/is-array-buffer/test/index.js

@@ -0,0 +1,49 @@
+'use strict';
+
+var test = require('tape');
+var inspect = require('object-inspect');
+var forEach = require('for-each');
+var v = require('es-value-fixtures');
+var availableTypedArrays = require('available-typed-arrays')();
+
+var isArrayBuffer = require('..');
+
+test('isArrayBuffer', function (t) {
+	t.equal(typeof isArrayBuffer, 'function', 'is a function');
+
+	/** @type {unknown[]} */
+	var nonABs = [].concat(
+		// @ts-expect-error TS sucks with [].concat
+		v.primitives,
+		v.objects,
+		typeof SharedArrayBuffer === 'function' ? new SharedArrayBuffer(0) : []
+	);
+	forEach(nonABs, function (nonAB) {
+		t.equal(isArrayBuffer(nonAB), false, inspect(nonAB) + ' is not an ArrayBuffer');
+	});
+
+	t.test('actual ArrayBuffer instances', { skip: typeof ArrayBuffer === 'undefined' }, function (st) {
+		var ab = new ArrayBuffer();
+		st.equal(isArrayBuffer(ab), true, inspect(ab) + ' is an ArrayBuffer');
+
+		var ab42 = new ArrayBuffer(42);
+		st.equal(isArrayBuffer(ab42), true, inspect(ab42) + ' is an ArrayBuffer');
+
+		var dv = new DataView(ab42);
+		st.equal(isArrayBuffer(dv), false, inspect(dv) + ' is not an ArrayBuffer');
+
+		st.end();
+	});
+
+	t.test('Typed Arrays', { skip: availableTypedArrays.length === 0 }, function (st) {
+		forEach(availableTypedArrays, function (TypedArray) {
+			var ta = new global[TypedArray](0);
+			st.equal(isArrayBuffer(ta.buffer), true, inspect(ta.buffer) + ', the TA\'s buffer, is an ArrayBuffer');
+			st.equal(isArrayBuffer(ta), false, inspect(ta) + ' is not an ArrayBuffer');
+		});
+
+		st.end();
+	});
+
+	t.end();
+});