refactor: switch to HttpOnly cookie (#660)

* Switch to httpOnly cookie
* create endpoint to retrieve temporary collaboration token

* cleanups

apps/client/package.json

@@ -26,7 +26,6 @@
     "@tanstack/react-query": "^5.61.4",
     "axios": "^1.7.8",
     "clsx": "^2.1.1",
-    "date-fns": "^4.1.0",
     "emoji-mart": "^5.6.0",
     "file-saver": "^2.0.5",
     "i18next": "^23.14.0",
@@ -34,7 +33,6 @@
     "jotai": "^2.10.3",
     "jotai-optics": "^0.4.0",
     "js-cookie": "^3.0.5",
-    "jwt-decode": "^4.0.0",
     "katex": "0.16.21",
     "lowlight": "^3.2.0",
     "mermaid": "^11.4.0",