Pure-TS ports of the legacy input + output pipelines:
- src/input/pipeline.ts: deadzone → circular clamp → zoom → centered
power curve → EMA smoothing → momentum-as-zoom. Exposed as a
pure function processInput(raw, cfg, state, dt) so the input-store
can hold the state. Math is intentionally bit-equivalent to the
legacy js/ui/input-pipeline.js implementation.
- src/output/pipeline.ts: global power curve → EMA smoothing →
slew-rate limit → freeze gate (global + per-output mask).
- src/output/curves.ts: named curve catalog (linear/exp/log/square/
sqrt/sigmoid/cubic/centered_power) — the TS half of the contract
defined in nisps/core/math.hpp (stream 1). Golden-vector tests
in stream 11 will keep them in lockstep.
Stream 8 of the rewrite (meml-911).
