fix(web): tame Next.js 16 dev server CPU runaway

- Disable typed routes (default-on in Next 16, loops infinitely
  with transpilePackages workspace setup, holding 500%+ CPU at idle)
- Pin turbopack.root to monorepo root so a stray ~/pnpm-lock.yaml
  cannot misinfer the workspace boundary
- Commit pnpm-lock.yaml; ignore .claude/ local plugin state

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

.gitignore

@@ -12,6 +12,7 @@ out
 
 .vercel
 .turbo
+.claude
 
 .DS_Store
 *.log

apps/web/next.config.ts

@@ -1,9 +1,14 @@
+import path from "node:path";
 import type { NextConfig } from "next";
 
 const config: NextConfig = {
   reactStrictMode: true,
+  typedRoutes: false,
   transpilePackages: ["@dada/engine", "@dada/ai-client", "@dada/types"],
   serverExternalPackages: ["sharp"],
+  turbopack: {
+    root: path.join(__dirname, "..", ".."),
+  },
   experimental: {
     serverActions: {
       bodySizeLimit: "10mb",