🎬 Jan 8 Enable PrologueScene + Character Sprite Loading

✅ INTRO CUTSCENE + CHARACTER SPRITES ADDED:

**1. Enabled PrologueScene (Intro Cutscene):**
- Uncommented PrologueScene.js in index.html
- Added PrologueScene to game.js scene list
- Now shows intro story when clicking 'New Game'
- Explains: What happened, where Kai is, who Ana is

**2. Character Sprite Loading:**
- Added preloadCharacterSprites() to PreloadScene
- Loading Kai idle + walk sprites
- Loading Ana idle + walk sprites
- Loading Susi (dog) idle + run sprites
- Path: /assets/references/main_characters/[char]/animations/

**Character Images Now Available:**
✅ kai_idle, kai_walk (Kai - protagonist)
✅ ana_idle, ana_walk (Ana - twin sister)
✅ susi_idle, susi_run (Susi - dog companion)

**Test Flow:**
1. Launch game → Loading screen
2. Click 'New Game' → PrologueScene intro
3. After intro → GameScene with character sprites

**Next:** Test TestVisualAudioScene with loaded sprites!

index.html

@@ -206,7 +206,7 @@
     <script src="src/scenes/DemoSceneEnhanced.js"></script> <!-- ✨ ENHANCED DEMO with Locket! -->
     <script src="src/scenes/TiledTestScene.js"></script> <!-- 🗺️ Tiled Map Test Scene -->
     <!-- ⚠️ TEMPORARILY DISABLED - Missing assets (prologue.json, NPC portraits) -->
-    <!-- <script src="src/scenes/PrologueScene.js"></script> --><!-- 🎬 Story Prologue -->
+    <script src="src/scenes/PrologueScene.js"></script><!-- 🎬 Story Prologue -->
     <script src="src/scenes/UIScene.js"></script>
     <script src="src/scenes/StoryScene.js"></script>
     <script src="src/scenes/TownSquareScene.js"></script>