Sep 11 - Reupload the code

extensions.py

@@ -0,0 +1,39 @@
+"""
+extensions.py
+=============
+Shared Flask extension instances (SQLAlchemy db + AppLogger).
+
+All Blueprints import from here to avoid circular imports.
+
+Initialization order (enforced in app.py):
+    1.  db = SQLAlchemy()           -- created here at module level
+    2.  app.py configures Flask app
+    3.  db.init_app(app)            -- called in app.py
+    4.  set_db(db)                  -- unpacks model classes
+    5.  init_logger(app, db)        -- binds logger_handler here
+    6.  Blueprints are registered
+"""
+
+from flask_sqlalchemy import SQLAlchemy
+from logger_handler import AppLogger
+
+# ---------------------------------------------------------------------------
+# Database — single shared instance
+# ---------------------------------------------------------------------------
+db = SQLAlchemy()
+
+# ---------------------------------------------------------------------------
+# Application-level logger — initialized via init_logger() below
+# ---------------------------------------------------------------------------
+logger_handler: "AppLogger | None" = None
+
+
+def init_logger(app, database) -> AppLogger:
+    """
+    Instantiate AppLogger and bind it to the module-level ``logger_handler``
+    variable so every Blueprint that does ``from extensions import logger_handler``
+    receives the same fully-initialized instance.
+    """
+    global logger_handler
+    logger_handler = AppLogger(app, database)
+    return logger_handler