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/sucrase/dist/NameManager.js

@@ -0,0 +1,27 @@
+"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+var _getIdentifierNames = require('./util/getIdentifierNames'); var _getIdentifierNames2 = _interopRequireDefault(_getIdentifierNames);
+
+ class NameManager {
+    __init() {this.usedNames = new Set()}
+
+  constructor(code, tokens) {;NameManager.prototype.__init.call(this);
+    this.usedNames = new Set(_getIdentifierNames2.default.call(void 0, code, tokens));
+  }
+
+  claimFreeName(name) {
+    const newName = this.findFreeName(name);
+    this.usedNames.add(newName);
+    return newName;
+  }
+
+  findFreeName(name) {
+    if (!this.usedNames.has(name)) {
+      return name;
+    }
+    let suffixNum = 2;
+    while (this.usedNames.has(name + String(suffixNum))) {
+      suffixNum++;
+    }
+    return name + String(suffixNum);
+  }
+} exports.default = NameManager;