Fix /injury roll command crash when player.team is None

The search_players() API endpoint returns team as an ID only (not nested object),
causing player.team to be None. Added null check before accessing team.thumbnail.

Fixes AttributeError: 'NoneType' object has no attribute 'thumbnail'

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-2.29.2
+2.29.3

commands/injuries/management.py

@@ -139,7 +139,7 @@ class InjuryGroup(app_commands.Group):
         embed = EmbedTemplate.warning(
             title=f"Injury roll for {interaction.user.name}"
         )
-        if player.team.thumbnail is not None:
+        if player.team and player.team.thumbnail:
             embed.set_thumbnail(url=player.team.thumbnail)
 
         embed.add_field(