HarmoniCast v1.1.19 — equalizer and playback controls

Version code: 81.

• Add a ten-band equalizer with a single interactive graph, built-in presets, and precise band controls.
• Adjust preamp separately, with live equalizer changes and settings saved on this device. The equalizer is off by default.
• Fix local playback controls failing to respond after connection discovery or controller disconnection.

Validation: all 328 Android tests and debug lint passed. Signed release assembly, release vital lint, APK version, and same-certificate verification passed. No physical-device installation was performed for this release.