add chat app

Author: sdairs

apps/web/.env.example

@@ -0,0 +1 @@
+ANTHROPIC_API_KEY=

apps/web/.gitignore

@@ -32,6 +32,7 @@ yarn-error.log*
 
 # env files (can opt-in for committing if needed)
 .env*
+!.env.example
 
 # vercel
 .vercel

apps/web/package.json

@@ -9,11 +9,15 @@
     "lint": "next lint"
   },
   "dependencies": {
+    "@ai-sdk/anthropic": "^1.0.6",
+    "@ai-sdk/openai": "^1.0.11",
     "@radix-ui/react-scroll-area": "^1.2.2",
     "@radix-ui/react-slot": "^1.1.1",
     "@radix-ui/react-tooltip": "^1.1.6",
+    "ai": "^4.0.22",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "date-fns": "^4.1.0",
     "lucide-react": "^0.469.0",
     "next": "^15.1.3",
     "nuqs": "^2.2.3",