Motivation

• Introduce i18n for UI page and card titles so the dashboard can display localized strings (added Chinese translations).

Description

• Added numerous translation keys and Chinese strings to ui/src/ui/i18n.ts for pages such as Usage, Agents, Nodes, Cron, Debug, Overview, Sessions, Skills, Channels, Logs, and Instances.
• Replaced hard-coded English headings in many view components with tr(key, fallback) calls and imported tr from ../i18n.ts across files under ui/src/ui/views/.
• Preserved English fallbacks in every tr usage so UI continues to render when a translation is missing.

Testing

• Ran a TypeScript type-check/build of the UI sources (tsc/UI build) and it completed without type errors.
• No automated unit tests were added or modified in this change.

Codex Task