Implement Elf Ranged Combat and Pinned Mechanic

- Added 'Shoot Bow' action for Elf with Ballistic Skill mechanics (1995 rules).
- Implemented strict Line of Sight (LOS) raycasting (Amanatides & Woo) with UI feedback for blockers.
- Added 'Pinned' status: Heroes adjacent to monsters (without intervening walls) cannot move.
- Enhanced UI with visual indicators for blocked shots (red circles) and temporary modals.
- Polished 'End Phase' button layout and hidden it during Monster phase.

src/main.js

@@ -115,6 +115,30 @@ game.onEntityDeath = (entityId) => {
     renderer.triggerDeathAnimation(entityId);
 };
 
+game.onRangedTarget = (targetMonster, losResult) => {
+    // 1. Draw Visuals
+    renderer.showRangedTargeting(game.selectedEntity, targetMonster, losResult);
+
+    // 2. UI
+    if (targetMonster && losResult && losResult.clear) {
+        ui.showRangedAttackUI(targetMonster);
+    } else {
+        ui.hideMonsterCard();
+        if (targetMonster && losResult && !losResult.clear && losResult.blocker) {
+            let msg = 'Línea de visión bloqueada.';
+            if (losResult.blocker.type === 'hero') msg = `Bloqueado por aliado: ${losResult.blocker.entity.name}`;
+            if (losResult.blocker.type === 'monster') msg = `Bloqueado por enemigo: ${losResult.blocker.entity.name}`;
+            if (losResult.blocker.type === 'wall') msg = `Bloqueado por muro/obstáculo.`;
+
+            ui.showTemporaryMessage('Objetivo Bloqueado', msg, 1500);
+        }
+    }
+};
+
+game.onShowMessage = (title, message, duration) => {
+    ui.showTemporaryMessage(title, message, duration);
+};
+
 // game.onEntitySelect is now handled by UIManager to wrap the renderer call
 
 renderer.onHeroFinishedMove = (x, y) => {