Initial commit: AI-driven visual novel scaffold

- Monorepo (pnpm workspace): apps/web + packages/{types,ai-client,engine}
- Next.js 16 web app with three-stage AI orchestration
- Three independently configurable providers: text LLM, image generator, vision model
- Warm minimalist editorial UI design
- One-click Vercel deploy ready

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/next.config.ts

@@ -0,0 +1,14 @@
+import type { NextConfig } from "next";
+
+const config: NextConfig = {
+  reactStrictMode: true,
+  transpilePackages: ["@dada/engine", "@dada/ai-client", "@dada/types"],
+  serverExternalPackages: ["sharp"],
+  experimental: {
+    serverActions: {
+      bodySizeLimit: "10mb",
+    },
+  },
+};
+
+export default config;