Implement randomized tile textures.

- DungeonGenerator: Selects a random texture from the card definition when finalizing tile placement.
- GameRenderer: Renders the specific chosen texture for each tile instance instead of the default.

src/engine/dungeon/DungeonGenerator.js

@@ -261,11 +261,20 @@ export class DungeonGenerator {
     placeCardFinal(card, x, y, rotation) {
         const variant = card.variants[rotation];
 
+        // Randomize Texture if multiple are available
+        let selectedTexture = null;
+        if (card.textures && card.textures.length > 0) {
+            const idx = Math.floor(Math.random() * card.textures.length);
+            selectedTexture = card.textures[idx];
+            console.log(`[DungeonGenerator] Selected texture for ${card.id}:`, selectedTexture);
+        }
+
         const instance = {
             id: `tile_${this.placedTiles.length}`,
             defId: card.id,
             x, y, rotation,
-            name: card.name
+            name: card.name,
+            texture: selectedTexture
         };
 
         this.grid.placeTile(instance, variant, card);