Fixed issues:
1. Added missing using directive for KCM.Packets namespace
- Fixes ShowModal class not found error in Main.cs
2. Removed unused 'callTree' variable (Main.cs:460)
- Variable was defined but never used
3. Removed unused 'awake' field (ServerLobbyScript.cs:63)
- Field was assigned but never used
All compilation warnings resolved.
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
