feat(cli): full i18n for CLI prompts

[21307369]

What's Changed

• 新增 CLI 交互提示的完整国际化支持
• 语言选择提前到第一个 prompt，后续所有提示都跟随所选语言
• 翻译覆盖：安装范围、平台选择、覆盖确认、安装进度消息、最终摘要
• 支持中文和英文两种语言

Test Plan

# 中文界面
comet init --language zh

# 英文界面
comet init --language en

已验证：

• --language zh 显示中文：「正在设置 Comet」「选择要配置的平台」「已存在」「Comet 设置完成！」等
• --language en 显示英文：「Setting up Comet」「Select platforms to set up」「already exists」「Comet setup complete!」等

Screenshots

Chinese (--language zh)

正在设置 Comet：/path/to/project
安装范围：
  项目（当前目录）
  全局（主目录）
选择要配置的平台：
  Claude Code (已检测到)
  Pi (已检测到)

English (--language en)

Setting up Comet in /path/to/project
Install scope:
  Project (current directory)
  Global (home directory)
Select platforms to set up:
  Claude Code (detected)
  Pi (detected)

Summary by CodeRabbit

Release Notes

• New Features
  • Added a --language <lang> option to the initialization command (supports English and Chinese).
  • Implemented multilingual CLI prompts and localized setup summary output.
  • Language selection now happens at the start of the setup flow, driving all subsequent messages.
  • Localized platform/scope prompts, installation logs, and “get started” section labels.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b735276d-b1a3-464e-a187-9d1a20fca7d8

📥 Commits

Reviewing files that changed from the base of the PR and between e461e45 and 77ab652.

📒 Files selected for processing (1)

• src/commands/init.ts

🚧 Files skipped from review as they are similar to previous changes (1)

• src/commands/init.ts

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📝 Walkthrough

Walkthrough

The init command gains multilingual support for English and Chinese. A TranslationKey union, TRANSLATIONS dictionary, and t(lang, key) helper are added to src/commands/init.ts. InitOptions gains an optional language field, a --language <lang> CLI option is wired in src/cli/index.ts, and all prompts, installation logs, and summary output are localized through the selected language.

Changes

init Command Multilingual Support

Layer / File(s)	Summary
i18n infrastructure, InitOptions.language, and CLI flag src/cli/index.ts, src/commands/init.ts	Adds TranslationKey union, TRANSLATIONS object for en/zh, t(lang, key) helper with English fallback, language field on InitOptions, and --language <lang> CLI option constrained to ['en', 'zh'].
Language/scope/platform selection and overwrite prompt localization src/commands/init.ts	Refactors selectScope, selectLanguage, and selectPlatforms to accept and use lang for localized prompt text; updates promptOverwriteChoice and promptBulkOverwriteChoice to build message strings from translation keys while preserving return type unions.
initCommand control flow and installation phase localization src/commands/init.ts	Reorders initCommand to select language/lang first, then localizes setup, version, no-platforms, bulk/per-component overwrite, OpenSpec/Superpowers installing/skipped, Comet skipped/rules/hooks, and CodeGraph prompt/log output via t(lang, ...). Action-resolution logic documented.
displaySummary localization src/commands/init.ts	Updates displaySummary to accept lang and localizes setup-complete heading, installed/skipped/failed labels, working-directories section, and get-started labels. Call site updated to pass lang.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐇 Hop hop, the rabbit speaks two tongues today,
English or Chinese — just pick your way!
--language zh and the prompts bloom bright,
t(lang, key) translates each message right.
From init to summary, no word left behind —
A bilingual burrow for all humankind! 🌸

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(cli): full i18n for CLI prompts' clearly and concisely describes the main change—adding full internationalization support to CLI prompts, which matches the comprehensive translation coverage implemented in the changeset.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/commands/init.ts`:
- Line 278: The init command has hardcoded English strings that bypass the
localization function in user-facing output at multiple locations. In
src/commands/init.ts at line 278, replace the hardcoded English string `scope`
in the console.log with a localized version using the t() function (e.g.,
t(lang, 'scope')). Similarly, at lines 461 and 516, identify and replace any
hardcoded English literals like `skipped` with their corresponding localized
equivalents using the translation function t(lang, key) to ensure the entire
init flow is properly translated when lang is set to values other than English.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 5296bb0d-2176-49f4-ad2c-b7df4c91ffb0

📥 Commits

Reviewing files that changed from the base of the PR and between 1148910 and e461e45.

📒 Files selected for processing (3)

• bin/comet.js
• src/cli/index.ts
• src/commands/init.ts

[benym]

Please resolve the CI issues first.