app/__init__.py

from flask import Flask
from flask_cors import CORS
from config import Config
from app.utils import markdown_to_html
from app.extensions import db

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)
    
    # Initialize extensions
    CORS(app)
    db.init_app(app)
    
    # Register Markdown filter
    app.jinja_env.filters['markdown'] = markdown_to_html
    
    # Register blueprints
    from app.routes import main, admin, api
    app.register_blueprint(main)
    app.register_blueprint(admin, url_prefix='/admin')
    app.register_blueprint(api, url_prefix='/api')
    
    # Create database tables
    with app.app_context():
        db.create_all()
    
    return app