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/bin/sucrase

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+
+require("../dist/cli").default();

frontend/node_modules/sucrase/bin/sucrase-node

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+const Module = require("module");
+const {resolve} = require("path");
+
+/*
+ * Simple wrapper around node that first registers Sucrase with default settings.
+ *
+ * This is meant for simple use cases, and doesn't support custom Node/V8 args,
+ * executing a code snippet, a REPL, or other things that you might find in
+ * node, babel-node, or ts-node. For more advanced use cases, you can use
+ * `node -r sucrase/register` or register a require hook programmatically from
+ * your own code.
+ */
+require("../register");
+
+process.argv.splice(1, 1);
+process.argv[1] = resolve(process.argv[1]);
+Module.runMain();