Add application feedback and refine headless canvas design boundaries

package.json

@@ -11,6 +11,7 @@
   "dependencies": {
     "@radix-ui/react-dialog": "1.3.1",
     "@radix-ui/react-slot": "1.5.0",
+    "@radix-ui/react-tooltip": "1.4.1",
     "@xyflow/react": "12.12.1",
     "class-variance-authority": "0.7.1",
     "clsx": "2.1.1",
@@ -19,6 +20,7 @@
     "next": "16.4.5",
     "react": "19.3.1",
     "react-dom": "19.3.1",
+    "sonner": "2.0.8",
     "tailwind-merge": "3.7.0"
   },
   "devDependencies": {