feat: add missing API endpoints or document omissions #24

Low Priority#

Missing:#

• GET /api/user - Profile fetch (though /api/auth/me exists)
• PUT /api/classes/:id - Update class details
• GET /api/passkeys/:id - Fetch individual passkey
• DELETE /api/transcriptions/:id - User-initiated deletion
• GET /api/sessions/:id - Fetch specific session details

Fix Time#

~2 hours

Recommendation#

Add if needed or document intentional omissions

From LAUNCH_REVIEW.md Issue #35