chore: ignore .claude/ workspace dir

settings.local.json carries per-user permission overrides; report.html
is a session-local artifact. Both belong outside version control,
matching how .vscode/ and .idea/ are already handled.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -47,6 +47,7 @@ vendor/
 # IDE and editor files
 .vscode/
 .idea/
+.claude/
 *.swp
 *.swo
 *~