You are working in a Go project named ginimageApi.

Goal:
Implement admin panel user management endpoints for the existing application structure.

Project details:
- Go version: 1.26
- Framework: Gin
- ORM: Gorm
- Existing packages already installed include gin, gorm, mysql/sqlite drivers, jwt, redis, swagger, bcrypt/crypto, etc.

Current structure:
- main.go
- .env
- app/
  - accounts/
    - handlers/user.go
    - models/accounts.go
  - settings/
    - handlers/settings.go
    - models/setting.go
    - models/hero.go
    - models/cors.go
  - shop/
    - handlers/shop.go
    - models/product.go
    - models/cart.go
  - blog/
    - handlers/blog.go
    - models/blog.go
- config/
  - db.go
  - redis.go
- router/router.go

Task:
Create admin user management endpoints suitable for an admin panel. Use the existing architecture and keep the implementation consistent with the project structure.

Expected endpoints:
- GET    /admin/users
- GET    /admin/users/:id
- POST   /admin/users
- PUT    /admin/users/:id
- PATCH  /admin/users/:id/status
- DELETE /admin/users/:id

Requirements:
- Follow Gin handler patterns already used in the project.
- Use Gorm for database operations.
- Add request/response DTOs if needed.
- Validate inputs properly.
- Hash passwords securely.
- Do not return sensitive fields such as password hashes.
- Add middleware/auth guard assumptions if needed, but keep integration minimal and compatible with the existing codebase.
- Keep code clean, modular, and idiomatic.
- If admin role support does not exist yet, introduce it in the least disruptive way.
- Prepare router wiring under the existing router structure.
- If model changes are required, update the relevant accounts model carefully.
- If migrations are needed, provide the code changes in a way compatible with SQLite and MySQL.

Implementation notes:
- Prefer small, focused changes.
- Reuse existing user/account model if possible.
- Include filtering, pagination, and search support in list endpoint if practical.
- Make sure error responses are consistent.
- If helpful, add service/helper functions, but keep the structure aligned with the current app layout.

Deliverables:
- Updated model(s) if needed
- New/updated admin user handler(s)
- Router registration
- Any supporting helper/DTO code
- Brief documentation comments if useful