fix: Issues in German translation

[Phoenix616]

This fixes some issues in the German translation:

• The "back" button in the menu was translated with the German word for the body part "back" instead of the one for "going backwards"
• Grammatical error in the XSS warning message
• Fix non-full German translation in unreadMention_plural

Summary by CodeRabbit

• Chores
  • Updated German language translations for improved messaging accuracy and consistency throughout the user interface, including refinements to menu labels, notification text, and descriptive content.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai[bot]]

Walkthrough

German language translation file updated with corrections and improvements. Menu back button translation revised, self-XSS description reworded for clarity, and unread mention notifications translated from English to German.

Changes

Cohort / File(s)	Summary
German Localization Updates src/i18n/de-DE.i18n.json	Updated German translations: menu back button ("&Der Rücken" → "&Zurück"), self-XSS description reworded with corrected quoting, and unread mention/direct message plural tooltip translated to German. Trailing whitespace adjusted.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Translation strings are straightforward text updates with no logic changes
• Single file modification makes scope minimal
• Verify translations are accurate German and context-appropriate
• Confirm template variables (e.g., {{- count}}) remain intact in tooltip strings

Poem

🐰 A rabbit hops through languages bright, German words now perfectly right, From "&Der Rücken" to "&Zurück" we spring, Translations polished—a localization thing! 🌍✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately summarizes the main change: fixing issues in German translations across multiple keys (menu back button, XSS message, and unread mentions).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment

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[CLAassistant]

All committers have signed the CLA.