Task 24 Evidence: Blog Navigation Link
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Build: PASS
- npm run build completed successfully (84 pages built)

Verification:
- EN blog link (/blog/) found in dist/index.html
- RU blog link (/ru/blog/) found in 38 RU pages including dist/ru/index.html

Changes made:
- Modified src/components/LanguageSwitcher.astro
- Added Blog / Блог link between language toggle and About link
- Link points to /blog/ on EN pages and /ru/blog/ on RU pages
- Used existing translation keys (blog: "Blog", blog: "Блог") from src/i18n/translations.ts
- Styled consistently with existing About/Privacy links
