enh: Navigation helpnotes

[Wuyika]

Description

• Translate categories for non-English users
• Add description to items on side bar
• Spelling check errors

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[sourceant]

Code Review Summary

This PR focuses on improving user experience through better localization, descriptive UI elements in the sidebar, and fixing spelling/translation errors. It also cleans up global constants.

🚀 Key Improvements

• Modularized sidebar items in lib/presentation/utils/custom_drawer.dart for better maintainability.
• Localized category names and descriptions for German, Spanish, French, Italian, and Russian.
• Cleanup of unused static data in lib/presentation/utils/globals.dart.

💡 Minor Suggestions

• Avoid hardcoding specific grey shades; use theme-based colors.
• Ensure PageController lifecycle is managed correctly in onboarding.

[sourceant]

Review complete. See the overview comment for a summary.

[sourceant]

Review complete. See the overview comment for a summary.