MANUAL RUN: Mythic Masters fight on a real phone, any stutter? (~3 min) #3813

About 3 minutes. Part of #2830. An emulated phone with a 4x-slowed CPU holds about 43 to 46 fps in a busy fight, and the effects never reach their particle cap (PR #3812). This checks a real phone.

1. On your phone, open the deployed Mythic Masters (or the dev server's LAN URL) with ?a=hydra&b=kyubi&skin=stadium&watch=1.
2. Watch about 30 seconds of the two bots fighting.
3. Does it stutter or drop frames when the big moves land?

Yes (smooth): close. No: say which moves hitch. The fix would be one InstancedMesh per particle shape (src/fx.ts).