feat: phase 0 skeleton — next.js 16 + better-auth + prisma

apps/web/src/app/api/auth/[...all]/route.ts

@@ -0,0 +1,4 @@
+import { auth } from "@/lib/auth";
+import { toNextJsHandler } from "better-auth/next-js";
+
+export const { GET, POST } = toNextJsHandler(auth);

apps/web/src/app/api/health/route.ts

@@ -0,0 +1,11 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/db";
+
+export async function GET() {
+  try {
+    await prisma.$queryRaw`SELECT 1`;
+    return NextResponse.json({ ok: true });
+  } catch {
+    return NextResponse.json({ ok: false }, { status: 503 });
+  }
+}