Implement advanced pathfinding and combat visual effects

- Add monster turn visual feedback (green ring on attacker, red ring on victim)
- Implement proper attack sequence with timing and animations
- Add room boundary and height level pathfinding system
- Monsters now respect room walls and can only pass through doors
- Add height level support (1-8) with stairs (9) for level transitions
- Fix attack validation to prevent attacks through walls
- Speed up hero movement animation (300ms per tile)
- Fix exploration phase message to not show on initial tile placement
- Disable hero movement during exploration phase (doors only)

src/main.js

@@ -37,6 +37,11 @@ generator.grid.placeTile = (instance, variant, card) => {
     setTimeout(() => {
         renderer.renderExits(generator.availableExits);
 
+        // Don't show modal if we are not in Exploration phase (e.g. during Setup)
+        if (game.turnManager.currentPhase !== 'exploration') {
+            return;
+        }
+
         // NEW RULE: Exploration ends turn immediately. No monsters yet.
         // Monsters appear when a hero ENTERS the new room in the next turn.
         ui.showModal('Exploración Completada',
@@ -98,6 +103,14 @@ game.onEntityMove = (entity, path) => {
     renderer.moveEntityAlongPath(entity, path);
 };
 
+game.onEntityActive = (entityId, isActive) => {
+    renderer.setEntityActive(entityId, isActive);
+};
+
+game.onEntityHit = (entityId) => {
+    renderer.triggerDamageEffect(entityId);
+};
+
 // game.onEntitySelect is now handled by UIManager to wrap the renderer call
 
 renderer.onHeroFinishedMove = (x, y) => {