feat(admin): Implement admin role.

src/modules/moderation/settingui.py

@@ -18,9 +18,10 @@ _p = babel._p
 
 class ModerationSettingUI(ConfigUI):
     setting_classes = (
+        ModerationSettings.ModRole,
+        ModerationSettings.AdminRole,
         ModerationSettings.TicketLog,
         ModerationSettings.AlertChannel,
-        ModerationSettings.ModRole,
     )
 
     def __init__(self, bot: LionBot, guildid: int, channelid, **kwargs):
@@ -103,6 +104,31 @@ class ModerationSettingUI(ConfigUI):
             "Select Moderator Role"
         ))
 
+    # Admin Role Selector
+    @select(
+        cls=RoleSelect,
+        placeholder="ADMINROLE_MENU_PLACEHOLDER",
+        min_values=0, max_values=1
+    )
+    async def adminrole_menu(self, selection: discord.Interaction, selected: RoleSelect):
+        """
+        Single role selector for the `admin_role` setting.
+        """
+        await selection.response.defer(thinking=True, ephemeral=True)
+        
+        setting = self.get_instance(ModerationSettings.AdminRole)
+        setting.value = selected.values[0] if selected.values else None
+        await setting.write()
+        await selection.delete_original_response()
+    
+    async def adminrole_menu_refresh(self):
+        menu = self.adminrole_menu
+        t = self.bot.translator.t
+        menu.placeholder = t(_p(
+            'ui:moderation_config|menu:adminrole|placeholder',
+            "Select Admin Role"
+        ))
+
     # ----- UI Flow -----
     async def make_message(self) -> MessageArgs:
         t = self.bot.translator.t
@@ -133,13 +159,15 @@ class ModerationSettingUI(ConfigUI):
             self.ticket_log_menu_refresh(),
             self.alert_channel_menu_refresh(),
             self.modrole_menu_refresh(),
+            self.adminrole_menu_refresh(),
         )
         await asyncio.gather(*component_refresh)
 
         self.set_layout(
+            (self.adminrole_menu,),
+            (self.modrole_menu,),
             (self.ticket_log_menu,),
             (self.alert_channel_menu,),
-            (self.modrole_menu,),
             (self.edit_button, self.reset_button, self.close_button,)
         )