fix: use https universal link for open-discord button (discord:// dead on desktop)

links/ask_views.py

@@ -22,9 +22,11 @@ from django.views.decorators.http import require_POST
 logger = logging.getLogger(__name__)
 
 DISCORD_BOT_ID = os.environ.get('DISCORD_BOT_ID', '1467845106831855796')
+# 用 https universal link（手机上唤起 APP，桌面上打开网页版），
+# 比 discord:// custom scheme 兼容性更好（后者在桌面浏览器不可用）。
 DISCORD_DEEPLINK = os.environ.get(
     'DISCORD_DEEPLINK',
-    'discord://channels/1467846046590959798/1467846047089954952',
+    'https://discord.com/channels/1467846046590959798/1467846047089954952',
 )
 
 # 用 webhook 发消息（限制长度，Discord 单条消息上限 2000 字符）