perf(marketplace): reduce tab-switch lag with async CLI list and expl…

[Orchardxyz]

Summary

• Made list_cli_marketplace async via spawn_blocking so the Tauri event loop
  is not blocked during CLI registry loading
• Moved loadTrending trigger from the store's setTab into the component
  useEffect, passing tab explicitly to avoid stale state

Test plan

• First switch to AGENT-first CLI tab no longer causes noticeable UI lag
• Trending section updates correctly when switching between tabs
• CLI marketplace list loads asynchronously without blocking the UI

Before

After

[RealZST]

Thanks for the PR!

Added a follow-up commit (be5cd10): clicking the active tab leaves trendingLoading: true stuck because useEffect([tab]) doesn't re-fire on the same value. Most visible after a failed initial fetch when the user re-clicks the tab to retry. Guarded with tab !== prevTab.

Merged.