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/util/isExportFrom.js

@@ -0,0 +1,18 @@
+"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _keywords = require('../parser/tokenizer/keywords');
+var _types = require('../parser/tokenizer/types');
+
+
+/**
+ * Starting at `export {`, look ahead and return `true` if this is an
+ * `export {...} from` statement and `false` if this is a plain multi-export.
+ */
+ function isExportFrom(tokens) {
+  let closeBraceIndex = tokens.currentIndex();
+  while (!tokens.matches1AtIndex(closeBraceIndex, _types.TokenType.braceR)) {
+    closeBraceIndex++;
+  }
+  return (
+    tokens.matchesContextualAtIndex(closeBraceIndex + 1, _keywords.ContextualKeyword._from) &&
+    tokens.matches1AtIndex(closeBraceIndex + 2, _types.TokenType.string)
+  );
+} exports.default = isExportFrom;