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/dom-accessibility-api/dist/accessible-name.js

@@ -0,0 +1,27 @@
+"use strict";
+
+exports.__esModule = true;
+exports.computeAccessibleName = computeAccessibleName;
+var _accessibleNameAndDescription = require("./accessible-name-and-description");
+var _util = require("./util");
+/**
+ * https://w3c.github.io/aria/#namefromprohibited
+ */
+function prohibitsNaming(node) {
+  return (0, _util.hasAnyConcreteRoles)(node, ["caption", "code", "deletion", "emphasis", "generic", "insertion", "none", "paragraph", "presentation", "strong", "subscript", "superscript"]);
+}
+
+/**
+ * implements https://w3c.github.io/accname/#mapping_additional_nd_name
+ * @param root
+ * @param options
+ * @returns
+ */
+function computeAccessibleName(root) {
+  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+  if (prohibitsNaming(root)) {
+    return "";
+  }
+  return (0, _accessibleNameAndDescription.computeTextAlternative)(root, options);
+}
+//# sourceMappingURL=accessible-name.js.map