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- Add RX/TX volume sliders with GainNode audio chain integration, scroll wheel support, and percentage display - Display server callsign and version from SSE event data - Merge TX Limit hint into its label line - Add copyright footer with link to haxx.space - Uniform section spacing via flex gap on #content Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>