bug(mixer): fader thumb not draggable in WKWebView #40

Summary

Volume faders in the mixer were visible but could not be dragged. The thumb was stuck at the leftmost position (or wherever it initialized).

Root cause

Two issues combined:

1. .lane-header.unavailable .lane-knob { pointer-events: none } cascaded to the child <input type="range">, blocking native drag interaction
2. The .lane-knob flex container had effectively zero width due to competing fixed-width sibling elements, leaving no room for the fader track

Fix

• Removed pointer-events: none from the .lane-knob in the unavailable rule (opacity dim kept)
• Tightened all non-fader elements (name col, dB value, buttons, padding, gap) so the flex:1 fader gets sufficient width
• Set touch-action: pan-y on .mx-fader-input for WKWebView horizontal drag

Release

0.5.0-alpha.1