feat: enhance gitignore and bot prefix handling

- Updated .gitignore to properly exclude Python cache files and environment variables
- Modified bot.py to improve prefix case handling for better command recognition
- Refactored mail.py to streamline feedback email generation and database interaction
- Added environment variable loading in mail.py for better configuration management

utils/bank_functions.py

@@ -4,7 +4,7 @@ from typing import Dict
 from datetime import datetime
 
 
-db = DatabaseManager("economy")
+db = DatabaseManager()
 
 
 async def create_account(user: discord.Member | discord.User):

utils/sql_commands.py

@@ -21,8 +21,17 @@ logger = logging.getLogger(__name__)
 class DatabaseManager:
     _instances = {}
 
+    @classmethod
+    def _resolve_instance_key(cls, env: str | None) -> str:
+        key = (env or "").strip()
+        if not key:
+            return "default"
+
+        env_file = f".env.{key}"
+        return key if os.path.exists(env_file) else "default"
+
     def __new__(cls, env="development"):
-        instance_key = env or "default"
+        instance_key = cls._resolve_instance_key(env)
         if instance_key in cls._instances:
             return cls._instances[instance_key]
         instance = super().__new__(cls)
@@ -49,8 +58,12 @@ class DatabaseManager:
             ),
         }
 
+        instance_key = self._resolve_instance_key(env)
+        pool_name = f"mypool_{instance_key}" if instance_key else "mypool_default"
         self.pool = pooling.MySQLConnectionPool(
-            pool_name="mypool", pool_size=5, **self.config
+            pool_name=pool_name,
+            pool_size=5,
+            **self.config,
         )
         logger.info("Database connection pool created.")