fix(i18n): update Japanese translations

[shuuji3]

🔗 Linked issue

N/A

🧭 Context

• Newly added several new keys.

📚 Description

• Add missing Japanese translations.

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Jul 1, 2026 1:30pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored		Jul 1, 2026 1:30pm
npmx-lunaria	Ignored		Jul 1, 2026 1:30pm

[github-actions]

Lunaria Status Overview

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Tracked Files

File	Note
i18n/locales/ja-JP.json	Localization changed, will be marked as complete.

Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: c1c9f35b-3f1c-4798-9d19-5edfc5822d8d

📥 Commits

Reviewing files that changed from the base of the PR and between 1880374 and e67354b.

📒 Files selected for processing (1)

• i18n/locales/ja-JP.json

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📝 Walkthrough

Summary by CodeRabbit

• New Features
  • Expanded Japanese translations for footer, command palette shortcuts, and the About page sponsors section.
  • Added clearer sponsor labels, including tier names for gold and silver sponsors.

Walkthrough

Updated the Japanese (ja-JP) locale JSON file, adding a sponsored_by footer string, a keyboard_shortcuts object with navigation/select/close labels in the command palette section, and restructured About page sponsor strings with gold and silver tier labels.

Changes

Japanese locale updates

Layer / File(s)	Summary
Footer, shortcut, and sponsor tier strings i18n/locales/ja-JP.json	Adds a sponsored_by footer template alongside the existing "other" label, introduces a keyboard_shortcuts object with navigate/select/close shortcut labels in the command palette section, and expands the About page sponsors area with a title plus gold and silver tier labels.

Possibly related PRs

• npmx-dev/npmx.dev#2745: Both PRs modify i18n/locales/ja-JP.json to update command-palette/keyboard shortcut translation strings.
• npmx-dev/npmx.dev#2902: Both PRs add/adjust command palette and keyboard-shortcut related strings in the same file.
• npmx-dev/npmx.dev#2960: Both PRs update locale JSON to add/align command-palette and footer keyboard_shortcuts strings across languages.

Suggested reviewers: ghostdevv

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: updating Japanese i18n translations.
Description check	✅ Passed	The description directly describes the change by noting newly added keys and missing Japanese translations.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch shuuji3/fix/update-japanese

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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