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/fast-glob/out/utils/array.js

@@ -0,0 +1,22 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.splitWhen = exports.flatten = void 0;
+function flatten(items) {
+    return items.reduce((collection, item) => [].concat(collection, item), []);
+}
+exports.flatten = flatten;
+function splitWhen(items, predicate) {
+    const result = [[]];
+    let groupIndex = 0;
+    for (const item of items) {
+        if (predicate(item)) {
+            groupIndex++;
+            result[groupIndex] = [];
+        }
+        else {
+            result[groupIndex].push(item);
+        }
+    }
+    return result;
+}
+exports.splitWhen = splitWhen;