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/elideImportEquals.js

@@ -0,0 +1,29 @@
+"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _types = require('../parser/tokenizer/types');
+
+
+ function elideImportEquals(tokens) {
+  // import
+  tokens.removeInitialToken();
+  // name
+  tokens.removeToken();
+  // =
+  tokens.removeToken();
+  // name or require
+  tokens.removeToken();
+  // Handle either `import A = require('A')` or `import A = B.C.D`.
+  if (tokens.matches1(_types.TokenType.parenL)) {
+    // (
+    tokens.removeToken();
+    // path string
+    tokens.removeToken();
+    // )
+    tokens.removeToken();
+  } else {
+    while (tokens.matches1(_types.TokenType.dot)) {
+      // .
+      tokens.removeToken();
+      // name
+      tokens.removeToken();
+    }
+  }
+} exports.default = elideImportEquals;