Strings displayed to users were missing Turkish characters (ö, ç, ğ, ş, ı, ü). Affects vehicle detail header/info card, category detail page, view-mode tooltips, and the "category not found" empty state in the tree component. Phase 1/8 of the UX audit follow-up. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>