chore: update package dependencies and improve heatmap output handling

app/package-lock.json

@@ -27,6 +27,7 @@
         "@types/react": "^18.3.5",
         "@types/react-dom": "^18.3.0",
         "@use-gesture/react": "^10.3.1",
+        "buffer": "^6.0.3",
         "chart.js": "^4.4.8",
         "chartjs-plugin-annotation": "^3.1.0",
         "dxf-parser": "^1.1.2",
@@ -8405,6 +8406,7 @@
           "url": "https://feross.org/support"
         }
       ],
+      "license": "MIT",
       "dependencies": {
         "base64-js": "^1.3.1",
         "ieee754": "^1.2.1"