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/camelcase-css/index.js

@@ -0,0 +1,30 @@
+"use strict";
+const pattern = /-(\w|$)/g;
+
+const callback = (dashChar, char) => char.toUpperCase();
+
+
+
+const camelCaseCSS = property =>
+{
+	property = property.toLowerCase();
+
+	// NOTE :: IE8's "styleFloat" is intentionally not supported
+	if (property === "float")
+	{
+		return "cssFloat";
+	}
+	// Microsoft vendor-prefixes are uniquely cased
+	else if (property.startsWith("-ms-"))
+	{
+		return property.substr(1).replace(pattern, callback);
+	}
+	else
+	{
+		return property.replace(pattern, callback);
+	}
+};
+
+
+
+module.exports = camelCaseCSS;