Sampling panel: width 260→220dp, padding reduced, spacing 14→6dp between
parameters, checkbox 20→16dp, slider height capped at 28dp, removed extra
spacer between label row and slider. Panel is now ~40% shorter.
Pills visibility: inactive background alpha raised (dark 0.06→0.10, light
0.04→0.07), border alpha doubled (dark 0.08→0.14, light was white-on-light
invisible, now uses black 0.10), icon tint 0.60→0.75, text 0.70→0.80.
Active state also strengthened. Pills are now clearly visible in both modes.
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