Automated balance runs; AI masters keep growing, mine more, defend with the rally flag and spells; Builder talent stronger

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/game.rs

@@ -161,6 +161,8 @@ pub struct St {
 
 pub const RUNE_TOOL: usize = 20; // index of the rune forge tower in ui::TOOLS
 pub const SUMMON_TOOL: usize = 11; // index of summoning in ui::TOOLS
+pub const LIGHTNING_TOOL: usize = 9; // lightning in ui::TOOLS
+pub const HEAL_TOOL: usize = 10; // healing in ui::TOOLS
 
 pub fn st(k: EK) -> St {
     let s = |name, hp, atk, range, speed, interval, wage, bounty| St { name, hp, atk, range, speed, interval, wage, bounty };