Two improvements to the template editor:
1. "+ Nouveau" button + creation dialog
Users can now create new templates from the editor UI without us
re-deploying the hub. Click "Nouveau" next to the template selector,
pick a name + prefix + starter (blank or copy from existing), submit.
The hub PUTs the new template (existing endpoint, no new code needed
on the backend — just relaxed validation).
Form:
• Type (prefix): gift-email / newsletter / transactional
• Name suffix: lowercase letters/digits/dashes (e.g. summer-2026)
• Starter: "Vide" or "Copier depuis <existing template>"
On submit:
• If starter != blank: GET source template's html + design
• PUT new template name with that content
• Refresh templates list + switch editor to the new one
2. Backend: replace hardcoded EDITABLE_TEMPLATES allow-list with
regex-validated prefix matching + disk scan
• EDITABLE_TEMPLATE_PREFIXES = ['gift-email-', 'newsletter-',
'transactional-'] — bounds what categories users can create
• TEMPLATE_NAME_RE = /^[a-z0-9-]+$/ — prevents path traversal
• isValidTemplateName() validates both regex + prefix membership
• scanEditableTemplates() returns all matching .html/.mjml files
currently on disk (excludes .bak-* and .legacy-* variants)
• listEditableTemplates() now scans disk instead of a static list,
so newly-created templates appear automatically in the dropdown
3. Enable Unlayer's built-in panels
• templates: true — exposes Unlayer's template library (limited
free-tier selection but ~10-20 starters available without a
projectId)
• stockImages: true — Unsplash search built into image picker
• imageEditor: true — basic crop/resize on inserted images
• undoRedo: true — history navigation
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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