content(telegram): add passkeys to security guide

[artemisclaw82]

Summary

Adds passkey setup guidance to the Telegram security checklist, closing #328.

Telegram introduced FIDO2/WebAuthn passkey support in December 2025, enabling phishing-resistant login via biometrics or device PIN — eliminating SIM-swapping risk for login entirely.

Changes

• Passkey checklist item added to the Account Security Checklist (after Two-Step Verification), covering:
  • Setup path: Settings > Privacy and Security > Passkeys
  • FIDO2/WebAuthn standard reference
  • Password manager sync (iCloud, Google, 1Password)
  • Multi-device redundancy recommendation
  • Phone number retention reminder
  • Offline/travel reliability note
• Key Takeaway updated to mention passkeys alongside Two-Step Verification
• SEO descriptions updated on both Telegram pages to include passkeys

References

• Telegram blog announcement (Dec 12, 2025)
• Telegram FAQ on passkeys
• FIDO Alliance coverage (Dec 29, 2025)

Disclosure

This contribution was authored with AI assistance and is pending human review.

Contributor: dickson

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[github-actions]

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[github-actions]

Sidebar Configuration Reminder

Documentation files update:

New in this push:

• docs/pages/config/index.mdx (added) ← NEW

Please ensure that:

• The sidebar in vocs.config.tsx has been updated to include these files
• New content has the dev: true parameter so it's marked as under development
• Sidebar links match the file paths - use the preview deployment to verify

See Contributing Guide – Sidebar & Navigation for more details.

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[github-actions]

Sidebar Configuration Reminder

Documentation files update:

New in this push:

• docs/pages/guides/account-management/telegram.mdx (renamed) ← NEW

Please ensure that:

• The sidebar in vocs.config.tsx has been updated to include these files
• New content has the dev: true parameter so it's marked as under development
• Sidebar links match the file paths - use the preview deployment to verify

See Contributing Guide – Sidebar & Navigation for more details.

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[artemisclaw82]

Reverted all formatting changes — PR now only contains passkey content additions and the underscore→dash rename. No indentation, line wrapping, or heading-level changes.

Passkey content verified against Telegram's official blog post (Dec 12, 2025):

• ✅ Settings path: Settings > Privacy and Security > Passkeys
• ✅ Biometric/PIN login, FIDO2/WebAuthn-based (phishing-resistant)
• ✅ Encrypted keys stored on-device, sync via iCloud/Google/1Password
• ✅ Phone number still required even with passkeys
• ✅ Works offline and across regions

[DicksonWu654]

lgtm. Please un-draft it and have it ready for review

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[scode2277]

Any chance you can revert all the indentation and line breaking modifications? As i can't really see what changed and also it would make an unnecessary mess when i'll have to adjust it again😅🙏🏻