chore: add .gemini/ and .claude/ to gitignore, remove leaked API key

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -48,9 +48,9 @@ serve.log
 *.svg
 
 # Project Specific
-.cbio/settings.json
-! .gemini/plans/*.md
-! .gemini/settings.json
+.agents/settings.json
+.gemini/
+.claude/
 
 # OS
 .DS_Store