Rebuild UI as a faithful recreation of the original Aurora-themed layout: sidebar panel nav, two-pane rename list, live naming-scheme preview

src/main.tsx

@@ -1,7 +1,12 @@
 import React from "react";
 import ReactDOM from "react-dom/client";
 import App from "./App";
-import "./styles.css";
+import "./theme.css";
+import "./App.css";
+import "./components/Sidebar.css";
+import "./components/Header.css";
+import "./components/RenamePanel.css";
+import "./components/PanelStub.css";
 
 ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
   <React.StrictMode>