The step-fraction `protect_until` was a mistake: it re-interpreted a tuned value
like 0.03 as "3% of the steps" (~0 steps = off), when it had always meant the
LEVEL "top 3% of the sigma range" (~7 steps on a front-loaded curve). Revert to
the level: `soften_range` directly = the top fraction of the sigma range to ease
(sigma-progress). Drop the confusing internal value scaling on both widgets so the
numbers mean what they say (max_soften 0.10 = 10% unpin; soften_range 0.03 = top
3%). Tooltips + info readout trimmed to one plain line. `steps_in_range` resolves
the level -> actual steps for the `info`/log readout (display only). Same slots,
so a placed node keeps its values under the new names.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
