UI5 / cli / 28782431185

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refactor(logger): Upgrade log-update to v8 and drop workaround

log-update v8 fixes the cursor-alignment bug in its diff path where a
growing frame would clamp the pre-write cursor move at 0 instead of
moving down to the new start row, causing the next erase to eat
scrollback above the live region. The InteractiveConsole worked around
this by calling logUpdate.clear() whenever the row count changed.

With the fix upstream, drop the workaround: remove the
lastFrameLineCount bookkeeping, simplify composeLiveRegion() to
return just the frame string, and let render() and logAbove() hand
that string straight to log-update. Also remove the test that pinned
the workaround behaviour and the stale reference in render.js.

v8 requires Node >= 22, which this repo already requires.

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