feat(app): refactor to app-factory; add application package and routes

application/__init__.py

@@ -0,0 +1,43 @@
+import os
+from flask import Flask
+from .extensions import db, migrate
+import logging
+from logging.handlers import RotatingFileHandler
+
+
+def create_app(config=None):
+    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+    # point templates/static to repository-level folders for compatibility
+    project_root = os.path.dirname(BASE_DIR)
+    app = Flask(__name__, template_folder=os.path.join(project_root, 'templates'), static_folder=os.path.join(project_root, 'static'), instance_relative_config=True)
+    # default config
+    DB_PATH = os.path.join(os.path.dirname(BASE_DIR), 'anmeldung.db')
+    app.config.setdefault('SQLALCHEMY_DATABASE_URI', f'sqlite:///{DB_PATH}')
+    app.config.setdefault('SQLALCHEMY_TRACK_MODIFICATIONS', False)
+
+    if config:
+        app.config.update(config)
+
+    # init extensions
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+    # logging setup (mirror previous behavior)
+    LOG_DIR = os.path.join(os.path.dirname(BASE_DIR), 'logs')
+    os.makedirs(LOG_DIR, exist_ok=True)
+    log_file = os.path.join(LOG_DIR, 'app.log')
+    handler = RotatingFileHandler(log_file, maxBytes=5 * 1024 * 1024, backupCount=3)
+    formatter = logging.Formatter('%(asctime)s %(levelname)s %(name)s: %(message)s')
+    handler.setFormatter(formatter)
+    handler.setLevel(logging.INFO)
+    app.logger.addHandler(handler)
+    app.logger.setLevel(logging.INFO)
+
+    # register blueprints
+    from .routes import bp as public_bp
+    app.register_blueprint(public_bp)
+
+    # expose BASE_DIR on app for compatibility
+    app.BASE_DIR = os.path.dirname(BASE_DIR)
+
+    return app