Main rebuilt the library tabs around stores (My Library, Shared,
Community). Replays joins them as LibraryTab.replays, backed by
replaysTabOpenProvider (replays are files on this computer, not a store)
and LibraryNavigation.showReplays; it is a desktop-only PlatformFeature,
so the web beta neither shows the tab nor offers it. FolderContent draws
the replay list for that tab; the title strip shows Add Replay there.

Opening a capture on its page now goes through the page session:
initializeForStrategy takes a preferredPageId, which loadFromHive passes,
instead of loading page one and switching. CI keeps main's workflow plus
the native-replay job.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>