mobile . themes

app.py

@@ -4130,6 +4130,24 @@ def api_remove_chat_member(room_id, uid):
         socketio.emit('room_updated', {'room_id': room_id}, room=f'room_{room_id}')
     return jsonify({'success': True})
 
+@app.route('/api/chat/rooms/<int:room_id>/dissolve', methods=['POST'])
+@login_required
+def api_dissolve_room(room_id):
+    """解散群聊（仅群主）"""
+    user_id = session['user']['id']
+    room = ChatRoom.query.get_or_404(room_id)
+    if room.type == 'private':
+        return jsonify({'success': False, 'message': '不能解散私聊'}), 400
+    if room.creator_id != user_id:
+        return jsonify({'success': False, 'message': '只有群主才能解散群聊'}), 403
+    # 删除所有成员、消息、群聊
+    ChatRoomMember.query.filter_by(room_id=room_id).delete()
+    Message.query.filter_by(room_id=room_id).delete()
+    db.session.delete(room)
+    db.session.commit()
+    socketio.emit('room_dissolved', {'room_id': room_id}, room=f'room_{room_id}')
+    return jsonify({'success': True, 'message': '群聊已解散'})
+
 @app.route('/api/chat/rooms/<int:room_id>/read', methods=['POST'])
 @login_required
 def api_mark_chat_read(room_id):
@@ -4920,10 +4938,10 @@ def admin_export_users():
     users = User.query.order_by(User.created_at.desc()).all()
     output = export_users_to_excel(users)
 
-    filename = f"用户数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.xlsx"
+    filename = f"用户数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
     return send_file(
         output,
-        mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+        mimetype='text/csv; charset=utf-8',
         as_attachment=True,
         download_name=filename
     )
@@ -4938,10 +4956,10 @@ def admin_export_exams():
     exams = Exam.query.order_by(Exam.created_at.desc()).all()
     output = export_exams_to_excel(exams)
 
-    filename = f"考试数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.xlsx"
+    filename = f"考试数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
     return send_file(
         output,
-        mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+        mimetype='text/csv; charset=utf-8',
         as_attachment=True,
         download_name=filename
     )
@@ -4956,10 +4974,10 @@ def admin_export_submissions():
     submissions = Submission.query.order_by(Submission.submitted_at.desc()).all()
     output = export_submissions_to_excel(submissions)
 
-    filename = f"提交记录_{datetime.now().strftime('%Y%m%d_%H%M%S')}.xlsx"
+    filename = f"提交记录_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
     return send_file(
         output,
-        mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+        mimetype='text/csv; charset=utf-8',
         as_attachment=True,
         download_name=filename
     )
@@ -4974,10 +4992,10 @@ def admin_export_contests():
     contests = Contest.query.order_by(Contest.created_at.desc()).all()
     output = export_contests_to_excel(contests)
 
-    filename = f"杯赛数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.xlsx"
+    filename = f"杯赛数据_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
     return send_file(
         output,
-        mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+        mimetype='text/csv; charset=utf-8',
         as_attachment=True,
         download_name=filename
     )
@@ -4992,10 +5010,10 @@ def admin_export_posts():
     posts = Post.query.order_by(Post.created_at.desc()).all()
     output = export_posts_to_excel(posts)
 
-    filename = f"论坛帖子_{datetime.now().strftime('%Y%m%d_%H%M%S')}.xlsx"
+    filename = f"论坛帖子_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
     return send_file(
         output,
-        mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+        mimetype='text/csv; charset=utf-8',
         as_attachment=True,
         download_name=filename
     )