基础重构，创建新的包结构

src/flask_prompt_master/__init__.py

@@ -0,0 +1,30 @@
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+from config import Config
+import os
+from flask_cors import CORS
+
+# 初始化扩展
+db = SQLAlchemy()
+migrate = Migrate()
+
+def create_app(config_class=Config):
+    app = Flask(__name__,
+                template_folder='templates',
+                static_folder='../static')
+    
+    app.config.from_object(config_class)
+
+    # 启用跨域支持
+    CORS(app)
+
+    # 初始化扩展
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+    # 注册蓝图
+    from flask_prompt_master.routes import main_bp
+    app.register_blueprint(main_bp)
+
+    return app