* 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
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Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>
