Add inbox-check line; align .gitignore with canonical .claude policy

Cross-repo git-hygiene audit remediation: surface ~/Projects/standards/INBOX.md items at session start, and switch .gitignore to the deny-by-default .claude/* block (shared wiring allow-listed) plus the canonical secrets/env lines — per standards/portability.md.

.gitignore

@@ -3,4 +3,13 @@ data/
 *.log
 .DS_Store
 .env
-.claude/
+.env.*
+!.env.example
+
+# Claude Code (deny by default, allow-list shared wiring — see standards/portability.md)
+.claude/*
+!.claude/rules/
+!.claude/agents/
+!.claude/commands/
+!.claude/skills/
+!.claude/settings.json