bake build infra: src/main.tsx (deterministic /ship for forks)

src/main.tsx

@@ -0,0 +1,15 @@
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import { ThemeProvider } from "next-themes";
+import { Toaster } from "@/components/ui/sonner";
+import App from "./App";
+import "./index.css";
+
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>
+    <ThemeProvider attribute="class" defaultTheme="system" enableSystem>
+      <App />
+      <Toaster richColors position="bottom-right" />
+    </ThemeProvider>
+  </StrictMode>
+);