Refactor imports and replace vars with constants; remove unused test file

src/pages/home.py

@@ -1,6 +1,6 @@
 import flet as ft
 from i18n import *
-from vars import *
+from constants import *
 
 set_language("pl")
 

src/test.py

@@ -1,44 +0,0 @@
-from sdk.src.interfaces.prometheus.context import (
-    PrometheusAuthContext,
-    PrometheusWebCredentials,
-)
-from sdk.src.interfaces.prometheus.interface import PrometheusInterface
-import os
-import pickle
-
-# NOT SAFE, DO NOT USE IN PRODUCTION
-if os.path.exists('data.temp'):
-    with open('data.temp', 'rb') as file:
-        auth_context = pickle.load(file)
-        interface = PrometheusInterface(
-            auth_context=auth_context,
-            student_context=None,
-        )
-        
-        interface.login()
-else:
-    interface = PrometheusInterface(
-        auth_context=PrometheusAuthContext(
-            prometheus_web_credentials=PrometheusWebCredentials(
-                username=input("Login: "), password=input("Hasło: ")
-            )
-        ),
-        student_context=None,
-    )
-    
-    interface.login()
-    auth_context = interface.get_auth_context()
-    
-    with open('data.temp', 'wb') as file:
-        pickle.dump(auth_context, file)
-
-students = interface.get_students()
-print(students)
-
-# Select the first student and fetch grades
-if students:
-    interface.select_student(students[0].context)
-    grades = interface.get_grades(int(1))
-    print(grades)
-else:
-    print("No students found.")