fix(i18n): Convert HelpComprehensive.tsx to use translation keys
Replaced all hardcoded English text with i18n translation function calls to enable proper internationalization. All sections now use helpComprehensive.* translation keys that are already present in en.json, es.json, fr.json, and de.json. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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