Per plan §3.7.1, the zone forces bots into contact. This change ensures
all built-in bots escape the zone FIRST when threatened (dist to zone
edge < 5 tiles), before any other action like energy collection or combat.
Changes:
- GuardianBot, SwarmBot, HunterBot: Added zone escape as Priority 1
- Phase 13 bots (Defender, Scout, Farmer, Pacifist, Phalanx, Raider,
Nomad, Opportunist, Assassin, Kamikaze): Added zone escape as Priority 1
- RandomBot: Added zone escape before random movement
The getZoneEscapeDirection function was already present and correctly
implements toroidal distance calculation with 5-tile safety margin.
Closes: bf-4m78q
ccdec39c52