Extends the existing bulk-select infra: recipes list gets tag add/remove
and multi-recipe Markdown export; collection pages get a select mode to
move recipes to another collection or remove them from the current one.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Select recipes → add to an existing collection or create a new one inline. Fixes duplicate "visibility" i18n key bug found during verification.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Arnaud