fix(call): define target param for 'switch-to-conversation'

[Antreesy]

☑️ Resolves

• Fix regression from feat: add permanent call rooms frontend #17332
  • When do breakout-room switch / extend-room switch, this.token still belongs to an old conversation
  • Solution: pass a param

Tip

Branch fix/noid/reverted-17675-17332-17335 has three reverted PRs to isolate and test separately
I'm afraid they're all bringing issues 👀

AI (if applicable)

• The content of this PR was partly or fully generated using AI

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

🏚️ Before	🏡 After
	All clean

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Integrations with Files sidebar and other apps
  • Not risky to browser differences / client
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required