Add log file generation for debugging

app.py

@@ -153,11 +153,41 @@ def generate_image(prompt, aspect_ratio, cfg, seed, checkpoint_file, config_path
         status_msg += "Running generation...\n"
         status_msg += "Note: First run includes checkpoint download (~10-20 min) and model loading (~2-5 min).\n"
         
+        # Create log file for debugging
+        log_file = output_dir / "generation.log"
+        status_msg += f"📋 Logs will be saved to: {log_file}\n"
+        
         # Run with timeout (45 minutes max - allows for download + generation)
-        result = subprocess.run(cmd, capture_output=True, text=True, cwd=os.getcwd(), timeout=2700)
+        # Capture output and write to log file
+        result = subprocess.run(
+            cmd, 
+            capture_output=True, 
+            text=True, 
+            cwd=os.getcwd(), 
+            timeout=2700
+        )
+        
+        # Write to log file
+        with open(log_file, 'w') as log:
+            log.write("=== GENERATION LOG ===\n\n")
+            log.write(f"Command: {' '.join(cmd)}\n\n")
+            log.write("=== STDOUT ===\n")
+            log.write(result.stdout)
+            log.write("\n\n=== STDERR ===\n")
+            log.write(result.stderr)
+            log.write(f"\n\n=== RETURN CODE: {result.returncode} ===\n")
+        
+        # Read log file for detailed output
+        log_content = ""
+        if log_file.exists():
+            with open(log_file, 'r') as f:
+                log_content = f.read()
+            status_msg += f"\n📋 Full logs available at: {log_file}\n"
         
         if result.returncode != 0:
             error_msg = f"Error during generation:\n{result.stderr}\n\nStdout:\n{result.stdout}"
+            if log_content:
+                error_msg += f"\n\n📋 Full log file ({log_file}):\n{log_content[-2000:]}"  # Last 2000 chars
             return None, error_msg
         
         status_msg += "Generation complete. Looking for output...\n"
@@ -170,7 +200,12 @@ def generate_image(prompt, aspect_ratio, cfg, seed, checkpoint_file, config_path
             latest_file = max(output_files, key=lambda p: p.stat().st_mtime)
             return str(latest_file), status_msg + "✅ Success! Image generated."
         else:
-            return None, status_msg + f"Error: Generated image not found in {output_dir}. Check stdout:\n{result.stdout}"
+            error_msg = status_msg + f"Error: Generated image not found in {output_dir}."
+            if log_content:
+                error_msg += f"\n\n📋 Check log file for details: {log_file}\nLast 1000 chars:\n{log_content[-1000:]}"
+            else:
+                error_msg += f"\n\nCheck stdout:\n{result.stdout}"
+            return None, error_msg
             
     except Exception as e:
         return None, f"Error: {str(e)}"