a803491cf4
The gallery promotional banner (#440) read as visually offset from the gallery footer because: - Footer used `container text-center px-4` (full container width, centered text). - Promo block used `container py-4 sm:py-6` with an inner `max-w-3xl mx-auto` wrapper holding left-aligned text — a narrower column with left-aligned content sitting in the middle of the page. Two issues compounded: the column was narrower than the footer AND its text alignment differed. Reported by Rekoo-PS in #482 with a screenshot showing the misalignment, with a request for an admin alignment option. Fix: - Drop the inner max-w-3xl wrapper. Promo content now spans the same .container width as the footer, eliminating the narrower-column visual. - Default text alignment changed from left → center to match the footer. - New `branding_promo_alignment` setting ('left' | 'center' | 'right', default 'center'). Surfaced as a dropdown next to the existing Position dropdown on the BrandingPage. Live preview block on the BrandingPage mirrors the gallery render so admins see what guests will see. - Also replaced the no-op `prose-sm` prose-modifier with a real `prose prose-sm` outer class so the existing `prose-a:text-accent` modifier actually takes effect (it didn't before — modifiers without an outer .prose are silently ignored by Tailwind Typography). Migration 103 seeds the new setting at 'center' so existing installs that have a promo banner today see the corrected alignment immediately on next deploy. i18n: en + de hand-translated; nl/pt/ru/fr machine-translated and flagged for native review per project convention.