Imported .codex-pet bundles played every animation at a flat 8 fps (~9x too
fast). Mirror Codex's exact per-frame duration tables, render uneven holds as
step-end keyframes, upgrade legacy-persisted pets at render, and add the Codex
mascot's pointer interactions (hover, grab-and-hold on frame 0, horizontal-drag
running). Hardened over several adversarial review rounds: honor explicit fps,
start each row/pet from frame 0, scope drag to its pointer, and guard untrusted
persisted data.
Fixes#8729
Co-authored-by: nasagong <zinho2000@gachon.ac.kr>
