fix: 修复 simple_test.py 中的未使用导入警告

Author: caishilong

test/simple_test.py

@@ -31,6 +31,7 @@
 
 try:
     from PIL import Image
+    _ = Image  # 标记为有意未使用
     print("  ✅ PIL")
 except ImportError as e:
     print(f"  ❌ PIL: {e}")
@@ -40,18 +41,21 @@
 
 try:
     from svision.options import Options
+    _ = Options  # noqa: F401
     print("  ✅ svision.options")
 except ImportError as e:
     print(f"  ❌ svision.options: {e}")
 
 try:
     from svision.aircv import aircv as aircv_module
+    _ = aircv_module  # noqa: F401
     print("  ✅ svision.aircv")
 except ImportError as e:
     print(f"  ❌ svision.aircv: {e}")
 
 try:
     from svision.orc import TextRecognizer
+    _ = TextRecognizer  # noqa: F401
     print("  ✅ svision.orc")
 except ImportError as e:
     print(f"  ❌ svision.orc: {e}")