Auricle 0.1.1

Fixes the 0.1.0 showstopper: the popover collapsed to an empty 41pt sliver inside the MenuBarExtra window (ScrollView reports no intrinsic height there), so nothing was clickable. The scroll region is now sized from measured content. Also: System Audio Recording permission is now probed at launch (immediate prompt/banner instead of waiting for the first slider touch), and the audio engine logs chain-up/failures to the unified log.

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