Update src/streamlit_app.py

src/streamlit_app.py

@@ -5,6 +5,7 @@ import matplotlib.pyplot as plt
 import seaborn as sns
 from scipy.stats import norm, skew
 import platform
+import os
 
 # --- 기존 set_korean_font 함수를 아래 코드로 전체 교체해주세요 ---