Fix Render Freeze on Encoder Thread Failure

.gitignore

@@ -36,6 +36,7 @@ desktop.ini
 /.agent/
 /GEMINI.md
 /.mcp.json
+/CLAUDE.md
 
 # Decompiled Game Code
 *.cs.txt
@@ -43,4 +44,7 @@ desktop.ini
 # Developer Description Files
 /AsyncInputAutoplayFix.md
 /AudioMixerExplanation.md
-/O5Theme.md
+/O5Theme.md
+
+# Developer Utility Files
+/REVIEW_CHECKLIST.md