Claude Code Safety Net Files

Bug fix: Preserve effective cwd when cd targets the current directory.

Previously, commands like cd . or cd /current/path would reset the effective cwd to unknown, potentially causing false-positive blocks on subsequent segments. The analyzer now resolves cd targets and recognizes when the directory hasn't actually changed, keeping the cwd intact.

Changes

• fix(analyze): Preserve effective cwd when cd targets the current directory
• fix(explain): Align cwd trace with resolved cd-to-same-directory behavior
• test(rm): Assert rm -rf stays allowed after cd to current cwd