- Deleted Caddy configuration types and validation logic from the backend.
- Removed associated test files for validation.
- Cleaned up related service and model files that are no longer needed.
- Removed unnecessary environment configuration and database connection code.
- Eliminated unused models related to access control, SSL certificates, and user management.
- Cleaned up node modules by removing unnecessary binaries.
- Add ProxyHost, CaddyConfig, RemoteServer, SSL, AccessList, User, Setting, ImportSession models
- Implement ProxyHostService and RemoteServerService with domain/name uniqueness validation
- Add Caddyfile import handler with conflict detection and user review workflow
- Create ProxyHostHandler and RemoteServerHandler with full CRUD operations
- Wire up Gin/GORM/SQLite dependencies and create missing internal packages
- Add database connection layer, server routing, and version info
- Update routes to register all new handlers and auto-migrate models
- Configure import environment variables and mount points
Addresses Issue #5 (data persistence) and Issue #43 (remote servers)
Backend now compiles cleanly with go build
