- Move save_init_options() before preset install so skills propagation
works during 'specify init --preset --ai-skills'
- Clean up downloaded ZIP after successful preset install during init
- Validate --from URL scheme (require HTTPS, HTTP only for localhost)
- Expose unregister_commands() on extensions.py CommandRegistrar wrapper
instead of reaching into private _registrar field
- Use _get_merged_packs() for search() and get_pack_info() so all
active catalogs are searched, not just the highest-priority one
- Fix fetch_catalog() cache to verify cached URL matches current URL
- Fix PresetResolver: script resolution uses .sh extension, consistent
file extensions throughout resolve(), and resolve_with_source()
delegates to resolve() to honor template_type parameter
- Fix bash common.sh: fall through to directory scan when python3
returns empty preset list
- Fix PowerShell Resolve-Template: filter out dot-folders and sort
extensions deterministically
