Refactor database message handling to support multiple messages and enhance type hints across various classes

src/ui/dialogs/reminder.py

@@ -3,7 +3,7 @@ from PyQt6 import QtWidgets
 from .dialog_sources.reminder_ui import Ui_Erinnerung as Ui_Dialog
 from src import Icon
 import datetime as date
-
+from typing import Any
 
 class ReminderDialog(QtWidgets.QDialog, Ui_Dialog):
     def __init__(self, parent=None):
@@ -13,8 +13,10 @@ class ReminderDialog(QtWidgets.QDialog, Ui_Dialog):
         self.setWindowTitle("Erinnerung")
         self.dateEdit.setDate(date.datetime.now())
 
-    def return_message(self) -> dict:
-        return {
-            "message": self.message_box.toPlainText(),
-            "remind_at": self.dateEdit.date().toString("yyyy-MM-dd"),
-        }
+    def return_message(self) -> list[dict[str, Any]]:
+        return [
+            {
+                "message": self.message_box.toPlainText(),
+                "remind_at": self.dateEdit.date().toString("yyyy-MM-dd"),
+            }
+        ]