Fix: Correct import paths for backend modules

app.py

@@ -11,12 +11,12 @@ from pathlib import Path
 import sys
 
 # Add backend to path
-sys.path.insert(0, str(Path(__file__).parent / "backend"))
+sys.path.insert(0, str(Path(__file__).parent))
 
-from services.diffusion_pipeline import DiffusionPipeline
-from services.upscaler import ESRGANUpscaler
-from services.post_processor import PostProcessor
-from config import settings
+from backend.services.diffusion_pipeline import DiffusionPipeline
+from backend.services.upscaler import ESRGANUpscaler
+from backend.services.post_processor import PostProcessor
+from backend.config import settings
 
 # Configure logging
 logging.basicConfig(level=logging.INFO)