On macOS Cocoa, TBitmap.pf32bit stores pixels in ARGB order
(byte0=A, byte1=R, byte2=G, byte3=B) rather than BGRA used on
Linux/Windows. All raw ScanLine pixel blending and channel mapping
is now guarded with { DARWIN} to use the correct offsets.
Also fix PortAudio library discovery on macOS: probe .dylib names
(including Homebrew paths) before falling through to .so/.dll.
- Add SampleRateOverlay.pas: TCustomControl overlay (top-left of spectrum)
with hide-panel button and 6 span buttons (48k–1536k), same hit-test
pattern as VfoOverlay
- Consolidate toolbar: move PanelTopVfoGroup and PanelSMeterRight into
PanelToolbar (height 72) instead of floating on the form
- Remove PanelSpanButtons (alTop spacer) that caused the ~1cm black strip
at the top of the spectrum
- Add separator line inside PanelToolbar anchored to its bottom edge,
with 16px left/right margins
- Fix left panel blocks starting Y offset (was 38, now 0)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Uladzimir Karpenka
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