fix(statistics): Fix several display errors.

src/modules/statistics/graphics/profile.py

@@ -76,7 +76,7 @@ async def get_profile_card(bot: LionBot, userid: int, guildid: int):
     else:
         next_rank = None
 
-    achievements = (0, 1)
+    achievements = (0, 1, 2, 3)
 
     card = ProfileCard(
         user=username,

src/modules/statistics/graphics/stats.py

@@ -34,7 +34,7 @@ async def get_stats_card(bot: LionBot, userid: int, guildid: int, mode: CardMode
     # Extract the study times for each period
     if mode in (CardMode.STUDY, CardMode.VOICE):
         model = data.VoiceSessionStats
-        refkey = (guildid, userid)
+        refkey = (guildid or None, userid)
         ref_since = model.study_times_since
         ref_between = model.study_times_between
     elif mode is CardMode.TEXT: