[caigee-cmd]

Root cause: useSkeletonSwap faded content with GSAP right after a heavy mount (whole page / 50-row table). GSAP's ticker counted the long mount frame as elapsed time, so the 280ms fade jumped to its end: content painted at opacity 0 for a frame, then popped in (flash). On top of that, the full-page skeleton hard-cut to the page shell and only the table faded, and every page/filter refetch swapped the table back to the skeleton and replayed the same flash.

Fix:

• useSkeletonSwap uses WAAPI (timeline starts at first painted frame) for the height + fade; only elements that actually showed a skeleton are animated.
• New useSkeletonExit: page root fades in exactly once when a full-page skeleton gives way (Logs, Overview, System, Keys, Providers, Access, Accounts).
• Logs: refetches keep current rows dimmed (opacity-60 transition) instead of returning to the skeleton; skeleton only when the list is empty.

Verified with Playwright + mocked /api (900ms delay): initial load = one 260ms 0→1 fade of whole page (h2 and table in sync); paging = 1→0.6→1 dim, no skeleton, no flash.
Lint/tsc/build/sync, changelog validate OK.