Ghostty's GPU compositor flash-renders each full-screen repaint at 120 FPS,
producing visible flicker identical to the VS Code issue fixed in #1356.
Extend apply_env_overrides() to also force low_motion=true +
fancy_animations=false when TERM_PROGRAM=ghostty, capping redraws to 30 FPS.
Add ghostty_term_program_forces_low_motion_on test mirroring the existing
vscode test, serialised through the process-wide lock_test_env() guard.
Fixes#1445
Signed-off-by: CrepuscularIRIS <serenitygp@qq.com>
CrepuscularIRIS
97a77d82f0