chore(UI): fix various build errors

[SenkJu]

For some reason, certain type definitions were no longer imported. Additionally, there was a type error with nested menu subtabs.

[liquidbounce-support-bot]

Thanks for the fix — splitting the inline prop type into a Props interface reads cleaner, and the missing import type lines look right (this is likely fallout from the Svelte bump in #8385).

One small thing on Tabs.svelte: subTabs is derived as tabs[activeTab].content and cast to SubTab[], but the Array.isArray(...) guard only exists in the markup, so the derived is evaluated outside it — tabs[activeTab]?.content as SubTab[], matching the optional chaining ActiveContent already uses, would keep it consistent (and avoids a throw on an empty tabs).

Worth confirming the full type check/build is green on nextgen after this, so nothing else dropped out of the type graph. No docs impact that I can see.

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🤖 Automated support reply — a human maintainer will review if this doesn't help.