fix: v0.2.3 e2e distro loop, FIDO2 freeze, grouped prompts

Fix e2e.sh distro iteration broken by IFS setting (use bash array).
Fix FIDO2 detection freezing on macOS (check ssh-sk-helper, don't
invoke ssh-keygen). Group apply prompts into 6 categories. Fix Linux
gitleaks install hint.

Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

@@ -4,11 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [0.2.2] - 2026-03-31
+## [0.2.3] - 2026-03-31
 
 ### Fixed
 - FIDO2 key generation on macOS — detect Homebrew's openssh via `ssh-sk-helper` (no freeze), use its `ssh-keygen` binary for hardware key generation
 - Linux gitleaks install hint now shows `apt`/`dnf` instead of `brew`
+- e2e test runner distro loop broken by `IFS` setting — use bash array
 
 ### Changed
 - Group interactive apply prompts into 6 categories with one-line explanations (replaces ~25 individual prompts)