zh: punctuation/symbols in translations use ASCII style (?/:/() etc.)

[MaxMiksa]

Problem
Some zh translations use ASCII punctuation (?, :, (...)) which reads unnatural in Chinese UI.

Where
Mainly packages/app/src/i18n/zh.ts, plus a couple entries in packages/ui/src/i18n/zh.ts.

Impact
Inconsistent punctuation in Chinese UI.

Suggested fix
Normalize to Chinese punctuation (？, ：, （…）) without touching i18n keys or template placeholders.