Update app.py

app.py

@@ -72,3 +72,18 @@ def main():
 
 if __name__ == "__main__":
     main()
+
+if st.button("🧪 运行OCR测试（检查Tesseract是否可用）"):
+    try:
+        from PIL import ImageDraw
+        test_img = Image.new('RGB', (300, 100), color=(255, 255, 255))
+        draw = ImageDraw.Draw(test_img)
+        draw.text((10, 10), "Hello OCR", fill=(0, 0, 0))
+        test_img.save("test_ocr.png")
+
+        ocr_result = pytesseract.image_to_string(test_img)
+        st.success("✅ OCR 正常运行！")
+        st.code(ocr_result)
+    except Exception as e:
+        st.error("❌ OCR 失败，Tesseract 未安装或不可用")
+        st.text(str(e))