Improved Japanese translation

I have completed an update to the Japanese language file, which includes all Japanese translations for the application. The original file name is js.locale. However, due to limitations in how GitHub displays files, I have renamed it to js.locale.json for the purpose of this submission. I would be grateful if you could review the attached file and incorporate these changes into a future release. Thank you for your consideration.

[ja.locale.json](https://github.com/user-attachments/files/19119820/ja.locale.json)

Start by reviewing the attached ja.locale.json and compare it with the repository's original js.locale language file. Verify that the submitted Japanese translations match the application's locale format and determine whether the updated file can be incorporated into a future release.

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