* feat(app): add AMOLED and all four Catppuccin themes Add an AMOLED theme (pure black background) and the four official Catppuccin flavors (Latte light, Frappé/Macchiato/Mocha dark) to the appearance picker. Generalize the dark-theme builder to support a light surface variant, register the new themes with Unistyles, and patch all registered theme keys when applying font/syntax appearance settings. * fix(app): localize Catppuccin + AMOLED theme labels across language packs The initial theme commit pasted the English brand/flavor labels into every locale. Localize them following each pack's convention: transliterate Catppuccin and the coffee-flavor names into Arabic/Russian scripts, use katakana/hanzi equivalents in ja/zh-CN, and standard loanwords in fr/es/pt-BR. AMOLED is a universal acronym and stays as-is except where the pack transliterates (Arabic). * fix(app): make Latte terminal ANSI colors readable * test(app): cover appearance theme picker options * refactor(app): scope theme PR to AMOLED * refactor(app): rename AMOLED theme to Pure Black * fix(app): refine Pure black appearance * test(app): wait for sidebar toggle icon * test(app): remove hover timing race --------- Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>