feat(ui): add shadcn/ui base components

- Add clsx, tailwind-merge, class-variance-authority dependencies
- Add Radix UI primitives (dialog, dropdown-menu, label, select, tabs, toast, slot)
- Add lucide-react for icons
- Create components.json for shadcn/ui configuration
- Create lib/utils.ts with cn(), formatCurrency(), formatDate(), formatTime()
- Create Button component with variants (default, destructive, outline, secondary, ghost, link, accent)
- Create Input component with focus ring styling
- Create Card components (Card, CardHeader, CardTitle, CardDescription, CardContent, CardFooter)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/package.json

@@ -14,11 +14,22 @@
   },
   "dependencies": {
     "@prisma/client": "^5.10.0",
+    "@radix-ui/react-dialog": "^1.0.5",
+    "@radix-ui/react-dropdown-menu": "^2.0.6",
+    "@radix-ui/react-label": "^2.0.2",
+    "@radix-ui/react-select": "^2.0.0",
+    "@radix-ui/react-slot": "^1.0.2",
+    "@radix-ui/react-tabs": "^1.0.4",
+    "@radix-ui/react-toast": "^1.1.5",
     "bcryptjs": "^2.4.3",
+    "class-variance-authority": "^0.7.0",
+    "clsx": "^2.1.0",
+    "lucide-react": "^0.330.0",
     "next": "14.2.0",
     "next-auth": "^4.24.0",
     "react": "^18.2.0",
-    "react-dom": "^18.2.0"
+    "react-dom": "^18.2.0",
+    "tailwind-merge": "^2.2.0"
   },
   "devDependencies": {
     "@types/bcryptjs": "^2.4.6",