refactor: replace websocket-stream with native ws utility

Remove the `websocket-stream` dependency in favor of
`createWebSocketStream`
from the `ws` package. This simplifies the MQTT broker setup in the
journal server and removes unnecessary transitive dependencies.

Also improve the JournalPanel UI with smoother transitions and better
visibility handling.

package.json

@@ -52,7 +52,6 @@
     "solid-js": "^1.9.3",
     "three": "^0.183.2",
     "three-3mf-exporter": "^45.1.0",
-    "websocket-stream": "^5.5.2",
     "ws": "^8.21.0",
     "yarn-spinner-loader": "^0.1.0",
     "zod": "^4.4.3"