Defence towers: arrow (piercing), cannon (splash + knockback), magic (mana, slow, chain); 3 levels, repair by imps, heroes attack towers; torture/temple room tools prepared

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

src/main.rs

@@ -476,6 +476,7 @@ async fn main() {
                                 (Tool::Lightning, _) => app.game.lightning(wx, wy),
                                 (Tool::Heal, _) => app.game.heal(wx, wy),
                                 (Tool::Summon, _) => app.game.summon(wx, wy),
+                                (Tool::Tower(k), Some((x, z))) => app.game.build_tower(k, x, z),
                                 _ => {}
                             }
                         }
@@ -568,6 +569,7 @@ fn draw_frame(app: &mut App, gfx: &Gfx, r3d: &mut R3d, ui: &mut Ui, menu: &mut M
         Tool::Lightning => (Color::new(1.0, 1.0, 0.6, 1.0), Some((ground.x, ground.y, 1.6))),
         Tool::Heal => (Color::new(0.4, 1.0, 0.5, 1.0), Some((ground.x, ground.y, 2.55))),
         Tool::Summon => (Color::new(0.8, 0.5, 1.0, 1.0), None),
+        Tool::Tower(_) => (Color::new(1.0, 0.6, 0.25, 1.0), None),
     };
     let ov = Overlay {
         hover: if over_ui { None } else { hover_tile.filter(|&(x, z)| inb(x, z)) },