Three new heroes: giant, fairy spy, battle mage

- giant (from wave 6): slow and enormous, smashes doors three times as hard and wrecks traps by standing next to them
- fairy spy (from wave 3): flies, finds the dungeon's traps (marked with a glint) so the heroes wreck them, and heals heroes around it
- battle mage (from wave 4): throws fireballs with splash and blasts reinforced walls (steel resists him better)
- sprites, bestiary texts EN/DE, test: fairies find traps, giants wreck them

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

src/render3d.rs

@@ -1283,7 +1283,7 @@ impl R3d {
             if !e.alive || e.held || unit_hidden(g, e) {
                 continue;
             }
-            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker | EK::Wyrm | EK::Gargoyle);
+            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker | EK::Wyrm | EK::Gargoyle | EK::Giant);
             let lift = if flies(e.kind) && !(matches!(e.job, Job::Sleep(_)) && !e.moving) { 0.45 } else { 0.0 };
             let head = proj(vec3(e.x, lift + if big { 0.9 } else { 0.72 }, e.y));
             // bar width in block characters, depending on the zoom
@@ -1363,7 +1363,7 @@ fn shade_c(r: u8, g: u8, b: u8, f: f32) -> Color {
 
 // size of a unit's sprite (same as in the billboards)
 fn sprite_size(k: EK) -> f32 {
-    if matches!(k, EK::Chainbreaker | EK::Wyrm) {
+    if matches!(k, EK::Chainbreaker | EK::Wyrm | EK::Giant) {
         1.0
     } else if matches!(k, EK::Ogre | EK::Paladin | EK::Jailer | EK::Gargoyle) {
         0.8
@@ -2086,7 +2086,7 @@ fn draw_shadows(g: &Game) {
         if !e.alive || e.held || unit_hidden(g, e) {
             continue;
         }
-        let r = if matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker) { 0.32 } else { 0.24 };
+        let r = if matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker | EK::Giant) { 0.32 } else { 0.24 };
         let fy = floor_y(g, e.x, e.y);
         disc(vec3(e.x, fy + 0.012, e.y), r, Color::new(0.0, 0.0, 0.0, 0.4), 12);
         let rc = if e.captive != 0 {
@@ -2296,6 +2296,11 @@ fn draw_traps_glow(g: &Game, t: f32) {
         if tr.stage != ARMED {
             continue;
         }
+        if tr.revealed && !tr.kind.door() {
+            // found by a fairy: a white warning glint above it
+            let a = 0.5 + 0.5 * (t * 6.0).sin();
+            draw_cube(c + vec3(0.0, 0.7 + 0.05 * (t * 3.0).sin(), 0.0), vec3(0.06, 0.18, 0.06), None, Color::new(1.0, 1.0, 1.0, a));
+        }
         match tr.kind {
             TrapKind::Poison => disc(c + vec3(0.0, 0.07, 0.0), 0.22, Color::new(0.4, 1.0, 0.3, 0.3 + 0.15 * (t * 2.0).sin()), 12),
             TrapKind::Fire => {