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/esm/util/shouldElideDefaultExport.js

@@ -0,0 +1,38 @@
+import {TokenType as tt} from "../parser/tokenizer/types";
+
+
+
+/**
+ * Common method sharing code between CJS and ESM cases, since they're the same here.
+ */
+export default function shouldElideDefaultExport(
+  isTypeScriptTransformEnabled,
+  keepUnusedImports,
+  tokens,
+  declarationInfo,
+) {
+  if (!isTypeScriptTransformEnabled || keepUnusedImports) {
+    return false;
+  }
+  const exportToken = tokens.currentToken();
+  if (exportToken.rhsEndIndex == null) {
+    throw new Error("Expected non-null rhsEndIndex on export token.");
+  }
+  // The export must be of the form `export default a` or `export default a;`.
+  const numTokens = exportToken.rhsEndIndex - tokens.currentIndex();
+  if (
+    numTokens !== 3 &&
+    !(numTokens === 4 && tokens.matches1AtIndex(exportToken.rhsEndIndex - 1, tt.semi))
+  ) {
+    return false;
+  }
+  const identifierToken = tokens.tokenAtRelativeIndex(2);
+  if (identifierToken.type !== tt.name) {
+    return false;
+  }
+  const exportedName = tokens.identifierNameForToken(identifierToken);
+  return (
+    declarationInfo.typeDeclarations.has(exportedName) &&
+    !declarationInfo.valueDeclarations.has(exportedName)
+  );
+}