fix: 修复依赖管理问题

- 删除未使用的flask依赖
- 为所有依赖指定版本号以确保一致性
- 依赖版本:
  - numpy>=1.24.0
  - polars>=0.19.0
  - scikit-learn>=1.3.0
  - imbalanced-learn>=0.11.0
  - matplotlib>=3.7.0
  - seaborn>=0.12.0
  - joblib>=1.3.0
  - pydantic>=2.0.0
  - streamlit>=1.28.0

pyproject.toml

@@ -6,16 +6,15 @@ version = "0.1.0"
 description = "信用卡欺诈检测系统"
 license = { text = "MIT" }
 dependencies = [
-    "flask",
-    "numpy",
-    "polars",
-    "scikit-learn",
-    "imbalanced-learn",
-    "matplotlib",
-    "seaborn",
-    "joblib",
-    "pydantic",
-    "streamlit",
+    "numpy>=1.24.0",
+    "polars>=0.19.0",
+    "scikit-learn>=1.3.0",
+    "imbalanced-learn>=0.11.0",
+    "matplotlib>=3.7.0",
+    "seaborn>=0.12.0",
+    "joblib>=1.3.0",
+    "pydantic>=2.0.0",
+    "streamlit>=1.28.0",
 ]
 
 [project.scripts]