Fix runtime errors - make AI Studio optional

- Wrap ai_studio import in try/except
- Remove audiocraft/xformers from requirements (causing build failures)
- AI Studio will show "not available" message until audiocraft works
- Core features (stems, chords, mastering) still work

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -43,11 +43,27 @@ from token_system import (
 # Import mastering module
 from mastering import master_audio, format_analysis, analyze_audio
 
-# Import AI Studio module
-from ai_studio import (
-    full_training_pipeline, generate_music, generate_with_melody,
-    get_model_choices, get_trained_models
-)
+# Import AI Studio module (optional - may fail if audiocraft not available)
+try:
+    from ai_studio import (
+        full_training_pipeline, generate_music, generate_with_melody,
+        get_model_choices, get_trained_models
+    )
+    HAS_AI_STUDIO = True
+except ImportError as e:
+    print(f"AI Studio not available: {e}")
+    HAS_AI_STUDIO = False
+    # Stub functions
+    def full_training_pipeline(*args, **kwargs):
+        return None, "AI Studio not available - audiocraft not installed"
+    def generate_music(*args, **kwargs):
+        return None, "AI Studio not available - audiocraft not installed"
+    def generate_with_melody(*args, **kwargs):
+        return None, "AI Studio not available - audiocraft not installed"
+    def get_model_choices():
+        return ["musicgen-small (Base)", "musicgen-medium (Base)"]
+    def get_trained_models():
+        return []
 
 # Optional imports
 try:

requirements.txt

@@ -9,5 +9,3 @@ torch>=2.0.0
 torchaudio>=2.0.0
 demucs>=4.0.0
 pyloudnorm>=0.1.0
-audiocraft>=1.3.0
-xformers>=0.0.22