adding a delete option for year tabs, excluding the Pre-2010 tab

backend.py

@@ -112,4 +112,9 @@ class AnimeBackend:
         with open(file_name, 'w', newline='') as f:
             writer = csv.writer(f)
             writer.writerow(['id', 'name', 'year', 'season', 'status', 'type', 'comment', 'url'])
-            writer.writerows(rows)
+            writer.writerows(rows)
+
+    def delete_year(self, year):
+        cursor = self.db.cursor()
+        cursor.execute("DELETE FROM anime WHERE year = ?", (year,))
+        self.db.commit()

frontend.py

@@ -131,6 +131,9 @@ class AnimeTracker(QMainWindow):
         add_year_act = QAction('Add New Year', self)
         add_year_act.triggered.connect(self.add_new_year)
         edit_menu.addAction(add_year_act)
+        del_year_act = QAction('Delete Year', self)
+        del_year_act.triggered.connect(self.delete_year)
+        edit_menu.addAction(del_year_act)
         tools_menu = menubar.addMenu('Tools')
         random_act = QAction('Random Pick', self)
         random_act.triggered.connect(self.random_pick)
@@ -372,6 +375,18 @@ class AnimeTracker(QMainWindow):
             self.backend.add_placeholders_for_year(year)
             self.load_tabs()
 
+    def delete_year(self):
+        current_year = datetime.now().year
+        year, ok = QInputDialog.getInt(self, "Delete Year", "Enter the year to delete:", 2010, 2010, current_year + 10)
+        if ok:
+            years = self.backend.get_years()
+            if year not in years:
+                QMessageBox.warning(self, "Error", f"Year {year} does not exist.")
+                return
+            if QMessageBox.question(self, "Confirm Delete", f"Are you sure you want to delete all entries for {year}?") == QMessageBox.Yes:
+                self.backend.delete_year(year)
+                self.load_tabs()
+
     def random_pick(self):
         if self.tab_widget.currentIndex() == -1:
             QMessageBox.information(self, "Random Pick", "No tab selected.")