Workstream F core. Pull-based InputSource interface (N axes + discrete
actions), three sources (XYPadSource push-based, WebMidiInputSource with
learn-map CCs/notes, GamepadSource single/double stick), and an InputLayer
that composes active sources into one N-dim vector at the head of the
reactive spine. Arity reduction blends >2 axes down to the fixed 2-input
WASM head; the true multi-WASM reshape is a documented TODO (inputs-spec).
useInputLayer is the React binding (enable/config/status/channel layout).
Adds the Manifold app (manifold/) — the convertible-mode React front-end on
the real NISPS ML+audio engine, served live at meml.lnfinitemonkeys.org/next/.
Console chrome trimmed per UI pass:
- drop mode label + subtitle from the top-left overlay (keep MEMLNaut wordmark)
- remove the composite split preset/ratio readout (top-centre)
- remove the OUTPUT corner tag above the bars
- remove the A/B compare toggle from the verdict cluster
- remove the follow button + input/noise readout (bottom-left)
- remove AltitudeNav focus switcher (bottom-right)
