chore(i18n): update zh-CN translation

[PaiJi]

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[greptile-apps]

Greptile Summary

This PR updates the Simplified Chinese (zh-CN) translation files with significant improvements:

• Added ~40 new translation entries for recently added UI labels (account, action, add-link, add-pixel, analysis, audience, behavior, channel, chart, criteria, documentation, download, environment, location, preferences, profiles, segments, support, traffic, etc.)
• Translated previously English-only error messages to Chinese (bad-request, forbidden, not-found, unauthorized, server-error)
• Localized common labels like label.email ("Email" → "邮箱"), label.online ("Online" → "在线"), and label.referral ("Referral" → "来源")

Issues found:

• label.table is mistranslated as "平板" (tablet/flat panel) instead of "表格" (data table)
• Three labels left in English: label.growth, label.save-cohort, label.save-segment

Confidence Score: 3/5

• This PR is a localization update with one semantic translation error that could confuse users.
• Score of 3 reflects that while this is a valuable localization contribution, the label.table mistranslation ("平板" instead of "表格") could cause confusion in the UI. The untranslated labels are minor style issues that don't affect functionality.
• src/lang/zh-CN.json - contains the label.table mistranslation that should be corrected before merging.

Important Files Changed

Filename	Overview
src/lang/zh-CN.json	Added many new Chinese translations and localized previously untranslated labels. Contains a few issues: label.table mistranslated as "平板" (tablet) instead of "表格" (table), and some labels left untranslated (label.growth, label.save-cohort, label.save-segment).
public/intl/messages/zh-CN.json	Compiled message format version of the translations. Same issues as source file: label.table mistranslated as "平板", and labels label.growth, label.save-cohort, label.save-segment left in English.

Sequence Diagram

sequenceDiagram
    participant User as User (zh-CN)
    participant UI as Umami UI
    participant i18n as i18n System
    participant Lang as zh-CN.json

    User->>UI: Access Umami in Chinese
    UI->>i18n: Request translations
    i18n->>Lang: Load zh-CN messages
    Lang-->>i18n: Return translated strings
    i18n-->>UI: Apply translations
    UI-->>User: Display localized interface

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[greptile-apps]

Additional Comments (3)

1. src/lang/zh-CN.json, line 267 (link)

   logic: label.table is translated as "平板" (tablet/flat panel), but this key likely refers to a data table, not a tablet device. The correct translation should be "表格".

2. src/lang/zh-CN.json, line 241-242 (link)

   style: These labels are left in English. Consider translating them to Chinese for consistency:

   • "Save as cohort" → "保存为队列"
   • "Save as segment" → "保存为细分"

3. src/lang/zh-CN.json, line 130 (link)

   style: label.growth is left in English. Consider translating to "增长" for consistency with other Chinese translations.

_{2 files reviewed, 3 comments}

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[mikecao]

👍 Thank you!