feat: complete CRUD operations for API consistency #5

Medium Priority#

Issues:#

• /api/passkeys/:id - Missing GET for individual passkey details
• /api/classes/:id - Missing PUT to update class details
• /api/transcriptions/:id - Missing PUT/DELETE for user-owned transcriptions
• /api/user - Missing GET for user profile (though /api/auth/me exists)

Impact#

Inconsistent API design, missing functionality

Fix Time#

~2 hours

Recommendation#

Add missing endpoints or document intentional omissions

From LAUNCH_REVIEW.md Issue #15