Add @radix-ui/react-slot and drop the packageManager pin

Note: removing packageManager means Corepack no longer pins Yarn 4 for
this repo, so `yarn` resolves to whatever is installed globally.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016jWbNNJLksC1QG8z8845FX

package.json

@@ -12,6 +12,7 @@
         "@ai-sdk/react": "^4.0.47",
         "@next/swc-wasm-web": "16.2.10",
         "@openrouter/ai-sdk-provider": "^3.0.0",
+        "@radix-ui/react-slot": "^1.3.3",
         "@radix-ui/react-use-controllable-state": "^1.2.6",
         "@remixicon/react": "^4.9.0",
         "@shopify/storefront-api-client": "^1.0.0",
@@ -50,6 +51,5 @@
         "@types/react": "^19",
         "@types/react-dom": "^19",
         "typescript": "^5.7.3"
-    },
-    "packageManager": "yarn@4.18.0+sha512.fcb8716fe7cd0eece141ffc18b92193a9df9204c1ba83189c288835223fc0bbe64af473bab0d5e9927a7daeb5caf2bb07eb2787cc9338ca040ea125f2a1f2f7e"
+    }
 }