Replace ifElse with derive to fix commontools_1 error

[bfollington]

Also replace derive with lift to combine lists reactively

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Summary by cubic

Fixes a runtime error in Chat List by replacing ifElse with derive and makes list merging reactive with lift. Also exposes the Chat List from the default app via a Quicklaunch button to address CT-933.

• New Features

  • Added “Chat List” button to Quicklaunch in default-app.tsx that navigates to ChatList with allCharms.

• Bug Fixes

  • Replaced ifElse with derive for rendering backlinks/mentioned, resolving the commontools_1 error and keeping the panel reactive.
  • Combined charmsList with allCharms using lift so the list updates when either source changes.

[linear]

CT-933 Make `chatbot-list` accessible from `default-app.tsx`