v1.15.02026-04-09

WCAG 2.2 AA full audit — 18 findings fixed

Fix all 18 findings from the comprehensive WCAG 2.2 audit: contrast fixes on checkboxes, placeholders, and textarea borders; FR-to-EN string standardisation; release-notes metadata; cookie banner padding; admin login a11y; PrioritySelect ARIA semantics; status messages on feedback and admin dashboard.

Behoben5

Fix checkbox border contrast (1.9:1 → 3:1+), placeholder contrast (3.2:1 → 4.5:1+), textarea border contrast (1.8:1 → 3:1+)
Standardise all Todo and admin component strings from hardcoded French to English
Add generateMetadata to release-notes/[version] page for unique page titles
Add role=alert, role=status, aria-live to AdminDashboard errors/loading, FeedbackWidget success/counter, admin login error
PrioritySelect dropdown: role=listbox/option + aria-selected; admin password: autocomplete + aria-invalid