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/@nodelib/fs.stat/out/settings.js

@@ -0,0 +1,16 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const fs = require("./adapters/fs");
+class Settings {
+    constructor(_options = {}) {
+        this._options = _options;
+        this.followSymbolicLink = this._getValue(this._options.followSymbolicLink, true);
+        this.fs = fs.createFileSystemAdapter(this._options.fs);
+        this.markSymbolicLink = this._getValue(this._options.markSymbolicLink, false);
+        this.throwErrorOnBrokenSymbolicLink = this._getValue(this._options.throwErrorOnBrokenSymbolicLink, true);
+    }
+    _getValue(option, value) {
+        return option !== null && option !== void 0 ? option : value;
+    }
+}
+exports.default = Settings;