Implement JWT authentication and app passkey support

- Add JWT token generation and validation
- Implement bcrypt password hashing
- Create auth service with register/login/refresh/logout
- Add app passkey generation and management
- Implement protected routes and auth middleware
- Add comprehensive tests for new functionality

docs/architecture.md

@@ -46,9 +46,12 @@ GET /api/v1/version
 POST /api/v1/auth/register
 POST /api/v1/auth/login
 POST /api/v1/auth/refresh
+POST /api/v1/auth/logout
 
-GET   /api/v1/users/me
-PATCH /api/v1/users/me
+GET    /api/v1/account
+GET    /api/v1/account/passkeys
+POST   /api/v1/account/passkeys
+DELETE /api/v1/account/passkeys/:id
 
 GET    /api/v1/files
 POST   /api/v1/files