minor and major reworks: rename swb to SRU, add a test for pdf parsing

major: rework mail to send mail as plaintext instead of html, preventing the bleed-in of html text

src/ui/widgets/searchPage.py

@@ -1,4 +1,5 @@
 import sys
+from typing import List
 
 import loguru
 from natsort import natsorted
@@ -6,8 +7,9 @@ from PySide6 import QtCore, QtGui, QtWidgets
 from PySide6.QtCore import Signal
 
 from src import LOG_DIR
-from src.backend import Database, Semester
-from src.logic import BookData, Prof, custom_sort, sort_semesters_list
+from src.backend import Database
+from src.logic import BookData, Prof, Semester, custom_sort, sort_semesters_list
+from src.logic.dataclass import Apparat
 from src.ui.dialogs import ApparatExtendDialog, Mail_Dialog, ReminderDialog
 from src.ui.widgets import DataQtGraph, StatusWidget
 from src.ui.widgets.signature_update import UpdaterThread
@@ -343,8 +345,7 @@ class SearchStatisticPage(QtWidgets.QDialog, Ui_Dialog):
         apparats = natsorted(appnrs)
         apparats = [str(apparat) for apparat in apparats]
         self.box_appnrs.addItems(apparats)
-        persons = self.db.getProfs()
-        persons = sorted(persons, key=lambda x: x.lastname)
+        persons: List[Prof] = sorted(self.db.getProfs(), key=lambda x: x.lastname)
         self.box_person.addItems(
             [f"{person.lastname}, {person.firstname}" for person in persons]
         )
@@ -398,7 +399,12 @@ class SearchStatisticPage(QtWidgets.QDialog, Ui_Dialog):
         selected_apparat_rows = []
         for i in range(self.tableWidget.rowCount()):
             if self.tableWidget.cellWidget(i, 0).isChecked():
-                selected_apparats.append(self.tableWidget.item(i, 2).text())
+                selected_apparats.append(
+                    Apparat(
+                        appnr=self.tableWidget.item(i, 2).text(),
+                        name=self.tableWidget.item(i, 1).text(),
+                    )
+                )
                 selected_apparat_rows.append(i)
         # delete all selected apparats
         # # ##print(selected_apparats)