ENTER selects, SPACE fires — and where the weapon voices went aa9e6a5

A sharp-eared pilot report: "Both ENTER and SPACE fire the weapons. Also, what happened to the audio when weapons selected?" One regression, two symptoms. At some point ENTER had been wired up as a second fire key and weapon selection was shuffled off to TAB — which meant that anyone reaching for ENTER, the Amiga original's weapon key, got a missile in the face instead of a menu. And the selection voice callout ("GUNS" / "SIDEWINDER" / "AMRAAM")? Never broken — the samples are all there and the path works — but the select code only runs when you select, and ENTER users were busy accidentally firing instead. Restored to spec: ENTER cycles weapons (with the voice callout confirming what's live), SPACE fires, TAB kept as an alias and 1/2/3 still jump straight to a weapon. Menu hint line and flight manual updated to match, verified on the harness — ENTER cycles aim120 → aim9 → gun with zero missiles leaving the rails — and the full touch gate re-run at 51/51.