settings: lay transcode params out in an even grid
The params row was a ragged flex-wrap and "Готовый профиль" was floated with margin-left:auto, so controls didn't line up and the preset menu dangled at an odd height. Split the row into a left grid (auto-fit columns, controls bottom-aligned, full-width) and a separate right-side "Готовый профиль" zone. Reorder fields logically: codec, H.264 profile, preset, rate control, bitrate, QP, keyframe interval. Drop the now-dead SOFT/MEDIUM/HARD button CSS. VERSION -> 0.0.123. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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