Add WebSocket support and update dependencies

- Introduced WebSocket polyfill for Node.js in seed-activity.ts and seed-profiles.ts to support applesauce-relay and RxJS.
- Updated package.json and package-lock.json to include 'ws' version 8.19.0 and '@types/ws' version 8.18.1 as dependencies.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -25,10 +25,12 @@
     "nostr-tools": "^2.23.0",
     "pinia": "^3.0.4",
     "vue": "^3.5.24",
-    "vue-router": "^4.6.3"
+    "vue-router": "^4.6.3",
+    "ws": "^8.19.0"
   },
   "devDependencies": {
     "@types/node": "^24.10.0",
+    "@types/ws": "^8.18.1",
     "@vitejs/plugin-vue": "^6.0.1",
     "@vue/tsconfig": "^0.8.1",
     "autoprefixer": "^10.4.22",