fixed some bugs with mypy

src/app/datahandler.py

@@ -9,7 +9,7 @@ def save_data(website: str, password: str) -> None:
     with open(DATA_FILE, "a") as f:
         f.write(data + '\n')
 
-def load_data() -> List[str]:
+def load_data() -> List[list[str]]:
     data_list = []
     with open(DATA_FILE) as f:
         data = f.read()

src/app/metadata.py

@@ -1,6 +1,7 @@
 """CHANGES IN THIS FILE CAN LEAD TO ADVERSE EFFECTS AND CAN EVEN CRASH THE APPLICATION"""
 
 import os
+from typing import List
 
 # App
 NAME: str = "Smart Manager"
@@ -9,8 +10,8 @@
 REPO: str = "https://github.com/JeelDobariya38/Smart-Manager"
 
 # Paths (all path are relative to this file)
-__DATADIR: str = ["..", "..", "..", "data"]
-__RESOURCEDIR: str = ["..", "..", "..", "resource"]
+__DATADIR: list[str] = ["..", "..", "..", "data"]
+__RESOURCEDIR: list[str] = ["..", "..", "..", "resource"]
 
 # FilePath (Do Not Change this session, instead change above "Paths" session)
 DATADIR_PATH: str = os.path.join(__file__, os.path.sep.join(__DATADIR)) + os.path.sep