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/@babel/runtime/helpers/wrapNativeSuper.js

@@ -0,0 +1,27 @@
+var getPrototypeOf = require("./getPrototypeOf.js");
+var setPrototypeOf = require("./setPrototypeOf.js");
+var isNativeFunction = require("./isNativeFunction.js");
+var construct = require("./construct.js");
+function _wrapNativeSuper(t) {
+  var r = "function" == typeof Map ? new Map() : void 0;
+  return module.exports = _wrapNativeSuper = function _wrapNativeSuper(t) {
+    if (null === t || !isNativeFunction(t)) return t;
+    if ("function" != typeof t) throw new TypeError("Super expression must either be null or a function");
+    if (void 0 !== r) {
+      if (r.has(t)) return r.get(t);
+      r.set(t, Wrapper);
+    }
+    function Wrapper() {
+      return construct(t, arguments, getPrototypeOf(this).constructor);
+    }
+    return Wrapper.prototype = Object.create(t.prototype, {
+      constructor: {
+        value: Wrapper,
+        enumerable: !1,
+        writable: !0,
+        configurable: !0
+      }
+    }), setPrototypeOf(Wrapper, t);
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _wrapNativeSuper(t);
+}
+module.exports = _wrapNativeSuper, module.exports.__esModule = true, module.exports["default"] = module.exports;