[i18n] Request Chinese translation for reasoning effort options

[GOCOMG]

Description

The Reasoning Effort selector in DSH displays only English options. Please add Chinese translations as bilingual labels, consistent with other translated parts of the UI.

Current Display

English	Expected Chinese
Default	默认
Off	关闭
Minimal	最小
Low	低
Medium	中
High	高

Environment

• DSH Version: 0.1.2-rc.1
• System Language: Simplified Chinese
• Browser: Chrome (Windows)

Expected

Options should display bilingual text (e.g., "Default 默认", "High 高"), consistent with DSH's existing Chinese translations.