Luxferre ff29160461 games: fix input/rendering lag and missed keypresses ...

Identified and fixed rendering/input optimization issues:
- Snake: added turn queue (max 2 pending turns) so rapid key presses are
  never lost; filters reversals and duplicates against the last queued
  direction. Batched snake body rendering into a single XFillRectangles call
  instead of one XFillRectangle per segment.
- Tetris: batched settled-block rendering into 3 XFillRectangles calls
  (body, highlight, shadow) instead of 5 XFillRectangle calls per cell.
  This reduces ~1000 X11 calls per frame to 3, fixing frame drops and
  input lag.
- Both: non-blocking input polling before every frame (already in place)
  ensures no keypress is missed.

2026-10-24 09:36:38 +03:00

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