feat: add download ZIP and push to GitHub features, fix code overflow in chat

package.json

@@ -18,6 +18,8 @@
     "clsx": "^2.1.1",
     "eslint": "^9.16.0",
     "eslint-config-next": "^15.0.3",
+    "file-saver": "^2.0.5",
+    "jszip": "^3.10.1",
     "lucide-react": "^0.562.0",
     "next": "^16.1.1",
     "postcss": "^8.4.49",
@@ -36,6 +38,7 @@
     "zustand": "^5.0.9"
   },
   "devDependencies": {
+    "@types/file-saver": "^2.0.7",
     "@types/node": "^22.10.1",
     "@types/react": "^19.0.1",
     "@types/react-dom": "^19.0.2"