Refactor UI and remove unused tests

- Deleted the generated UI file `untitled_ui.py` as it is no longer needed.
- Updated `search_statistic_page.ui` to enhance table properties, including grid style and sort indicators.
- Modified `search_statistic_page_ui.py` to reflect changes in the UI file and improve table header settings.
- Improved cleanup logic in `richtext.py` to ensure files are only deleted if they exist.
- Adjusted spacing in document generation for better formatting.
- Removed obsolete test files: `database_test.py`, `many_webrequest_test.py`, `test_database.py`, and `webrequest_test.py` to clean up the test suite.

src/backend/database.py

@@ -196,6 +196,7 @@ class Database:
         if "INTO user" in query:
             log_message = f"Querying database with query {query}"
         # logger.debug(f"DB Query: {log_message}")
+        log.debug(log_message)
         try:
             cursor.execute(query, args)
             rv = cursor.fetchall()
@@ -996,6 +997,10 @@ class Database:
             "UPDATE semesterapparat SET deletion_status=1, deleted_date=? WHERE appnr=?",
             (semester, app_id),
         )
+        self.query_db(
+            "UPDATE media SET deleted=1 WHERE app_id=?",
+            (app_id,),
+        )
 
     def isEternal(self, id):
         """check if the apparat is eternal (dauerapparat)
@@ -1020,11 +1025,14 @@ class Database:
         Returns:
             str: the name of the apparat
         """
-        return self.query_db(
+        result = self.query_db(
             "SELECT name FROM semesterapparat WHERE appnr=? AND prof_id=?",
             (app_id, prof_id),
             one=True,
-        )[0]
+        )
+        if result:
+            return result[0]
+        return None
 
     def updateApparat(self, apparat_data: ApparatData):
         """Update an apparat in the database