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/view/GameRenderer.js

@@ -498,7 +498,8 @@ export class GameRenderer {
         // Draw Texture Plane (The Image) - WAIT FOR TEXTURE TO LOAD
         if (tileDef && tileInstance && tileDef.textures && tileDef.textures.length > 0) {
 
-            const texturePath = tileDef.textures[0];
+            // Use specific texture if assigned (randomized), otherwise default to first
+            const texturePath = tileInstance.texture || tileDef.textures[0];
 
             // Load texture with callback
             this.getTexture(texturePath, (texture) => {