v1.1 - right-stick free look fix

Fixes the right stick doing nothing in free-look: the engine only reads the camera pitch/yaw deltas when its internal camera mode byte is 4, and something was resetting it to 1 every frame before this build re-asserted it. Same minimal package as v1.0 (exe, SDL3.dll, fonts, play.bat, extraction tools, data/image.bin).