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/removeMaybeImportAttributes.js

@@ -0,0 +1,22 @@
+"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _keywords = require('../parser/tokenizer/keywords');
+var _types = require('../parser/tokenizer/types');
+
+
+/**
+ * Starting at a potential `with` or (legacy) `assert` token, remove the import
+ * attributes if they exist.
+ */
+ function removeMaybeImportAttributes(tokens) {
+  if (
+    tokens.matches2(_types.TokenType._with, _types.TokenType.braceL) ||
+    (tokens.matches2(_types.TokenType.name, _types.TokenType.braceL) && tokens.matchesContextual(_keywords.ContextualKeyword._assert))
+  ) {
+    // assert
+    tokens.removeToken();
+    // {
+    tokens.removeToken();
+    tokens.removeBalancedCode();
+    // }
+    tokens.removeToken();
+  }
+} exports.removeMaybeImportAttributes = removeMaybeImportAttributes;