fix(settings): show active forced locale or language instead of 'No locale set' (#41543)

[arc64]

• Fixes Show active locale or language when either are forced rather than misleading No locale set #41543

Summary

When a forced locale or language is set by the administrator, this PR ensures the appropriate message is displayed instead of the misleading 'No locale set'.

1. Updated getLanguageMap() and getLocaleMap() in PersonalInfo.php to pass through validated forced settings. If settings are malformed, no forced value is passed (falls back to default).
2. Modified LanguageSection.vue and LocaleSection.vue to correctly handle display conditions:

• If forcedLocale or forcedLanguage exists, show 'Locale is forced to {locale} by the administrator' or 'Language is forced to {language} by the administrator'.
• If no forced value and no user settings are present, it falls back to 'No locale set' / 'No language set'.

3. Added tests for both Vue components to ensure correct behaviour

Before

Issue #41543 - Screenshot

After

Forced locale / language:

User-set locale / language:

TODO

• Check if PHP unit tests are required for getLanguageMap() and getLocaleMap(). I have not written tests yet, as running them in the current docker dev container was not successful (due to missing full test environment / FS setup). Feedback welcome.
• Check that the messaging in the views is inline with Nextcloud expectations - 'Locale is forced to {locale} by the administrator' and 'Language is forced to {language} by the administrator'.

Notes

When the locale is set (either by the user or forced by an administrator), it is displayed in English, regardless of the current interface language. This matches existing behaviour in user settings.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

Nice, thank you for the pull request! Added some comments :)

[susnux]

Nice that there is a test but for this its probably also good to add a cypress e2e test.

[arc64]

I haven't committed the cypress tests yet, as I'm struggling to get them running with my current setup (https://github.com/juliusknorr/nextcloud-docker-dev).

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[arc64]

I forgot to re-request a review, done now, @susnux thank you for your comments and labour