Sensitivity gate

FusedImpact.applySensitivity maps the raw 0-1 intensity through the user's sensitivity range. Sensitivity is inverted against threshold: high sensitivity means low threshold, more reactivity. Below the band, the impact is rejected silently. Above it, intensity is remapped onto a clean 0-1 scale that the rest of the system uses as the audio/face/flash intensity.

After fusion but before publishing to the bus, intensity passes through one more mapping. The user's sensitivity sliders define a window over the [0,1] intensity range. The gate rejects impacts below the lower edge and linearly rescales survivors to fill [0,1]. This is implemented as an intensityGate closure on ImpactFusion, set by Yamete during init. Infrastructure event sources bypass this gate entirely. they carry synthesized intensities from ReactionsConfig.eventIntensity.

      Sensitivity window mapping (FusedImpact.applySensitivity)