d0a38959c0
Adds a docs overlay that lives inside the rack chrome, opened from a new MANUAL hw-btn in the top bar (ESC also closes). Styled as a screen recess matching the editor — amber section headers, engraved labels, recessed code blocks — so it reads as a manual page of the instrument, not a help popup. Covers patch language, execution model, every node type (osc, trig, adsr, filter, noise, seq, delay, poly+voice) and the four control nodes (knob, fader, step_seq, piano_roll), plus practical tips on gain staging and hot-reload behavior. Each example block carries a TRY button that swaps the editor contents with the snippet so you can hear it immediately (Ctrl/Cmd-Z to bring your patch back).