feat: complete Style 32 overhaul & Tiled integration fix

- Enforced 'Style 32 - Dark Chibi Vector' for all ground assets.
- Fixed critical Prologue-to-Game crash (function renaming).
- Implemented Tiled JSON/TMX auto-conversion.
- Updated Asset Manager to visualize 1800+ assets.
- Cleaned up project structure (new assets/grounds folder).
- Auto-Ground logic added to GameScene.js.

src/systems/SoundManager.js

@@ -12,26 +12,37 @@ class SoundManager {
     playSFX(key) {
         if (this.isMuted) return;
 
-        if (this.scene.sound.get(key)) {
-            this.scene.sound.play(key, { volume: this.sfxVolume });
-        } else if (key === 'chop' && this.scene.sound.get('wood_chop')) {
+        // SAFE CHECK: Check cache instead of active instances
+        if (this.scene.cache.audio.exists(key)) {
+            try {
+                this.scene.sound.play(key, { volume: this.sfxVolume });
+            } catch (e) {
+                console.warn(`🔊 Failed to play SFX ${key}:`, e);
+                // Fallback to beep if playback fails
+                this.playFallbackBeep(key);
+            }
+        } else if (key === 'chop' && this.scene.cache.audio.exists('wood_chop')) {
             // Priority for real wood chop sound
             this.scene.sound.play('wood_chop', { volume: this.sfxVolume });
         } else {
             // Enhanced placeholder beeps
-            if (key === 'chop') {
-                this.beepChop();
-            } else if (key === 'pickup') {
-                this.beepPickup();
-            } else if (key === 'plant') {
-                this.beepPlant();
-            } else if (key === 'harvest') {
-                this.beepHarvest();
-            } else if (key === 'build') {
-                this.beepBuild();
-            } else if (key === 'dig') {
-                this.beepDig();
-            }
+            this.playFallbackBeep(key);
+        }
+    }
+
+    playFallbackBeep(key) {
+        if (key === 'chop') {
+            this.beepChop();
+        } else if (key === 'pickup') {
+            this.beepPickup();
+        } else if (key === 'plant') {
+            this.beepPlant();
+        } else if (key === 'harvest') {
+            this.beepHarvest();
+        } else if (key === 'build') {
+            this.beepBuild();
+        } else if (key === 'dig') {
+            this.beepDig();
         }
     }
 
@@ -43,9 +54,15 @@ class SoundManager {
             this.currentMusic.stop();
         }
 
-        if (this.scene.sound.get(key)) {
-            this.currentMusic = this.scene.sound.add(key, { volume: this.musicVolume, loop: loop });
-            this.currentMusic.play();
+        if (this.scene.cache.audio.exists(key)) {
+            try {
+                this.currentMusic = this.scene.sound.add(key, { volume: this.musicVolume, loop: loop });
+                this.currentMusic.play();
+            } catch (e) {
+                console.warn(`🎵 Failed to play music ${key}:`, e);
+            }
+        } else {
+            console.warn(`🎵 Music key not found: ${key}`);
         }
     }
 
@@ -259,9 +276,15 @@ class SoundManager {
     playAmbient(key, loop = true) {
         if (this.isMuted) return;
         if (this.currentAmbient) this.currentAmbient.stop();
-        if (!this.scene.sound.get(key)) return;
-        this.currentAmbient = this.scene.sound.add(key, { volume: this.sfxVolume * 0.5, loop: loop });
-        this.currentAmbient.play();
+
+        if (!this.scene.cache.audio.exists(key)) return;
+
+        try {
+            this.currentAmbient = this.scene.sound.add(key, { volume: this.sfxVolume * 0.5, loop: loop });
+            this.currentAmbient.play();
+        } catch (e) {
+            console.warn(`🍃 Failed to play ambient ${key}:`, e);
+        }
     }
 
     stopAmbient() {