shuki 1f68ea1058 Security hardening, static analysis fixes, and expanded test coverage ...

- Fix CRITICAL: safe config parser replacing shell source, sshpass -e,
  CSRF with /dev/urandom, symlink-safe file I/O
- Fix HIGH: input validation for timestamps/accounts, path traversal
  prevention in Runner.pm, AJAX CSRF on all endpoints
- Fix MEDIUM: umask 077, chmod 700 on config dirs, Config.pm TOCTOU lock,
  rsync exit code capture bug, RSYNC_EXTRA_OPTS character validation
- ShellCheck: fix word-splitting in notify.sh, safe rm in pkgacct.sh,
  suppress cross-file SC2034 false positives
- Perl::Critic: return undef→bare return, return (sort), unpack @_,
  explicit return on void subs, rename Config::write→save
- Remove dead code: enforce_retention_all(), rsync_dry_run()
- Add require_cmd checks for rsync/ssh/hostname/gzip at startup
- Escape $hint/$tip in CGI helper functions for defense-in-depth
- Expand tests from 17→40: validate_timestamp, validate_account_name,
  _safe_source_config (including malicious input), numeric validation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-04 23:57:26 +02:00

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