refactor(backend): 引入端口接口模式

backend/internal/service/ports/proxy.go

@@ -0,0 +1,23 @@
+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type ProxyRepository interface {
+	Create(ctx context.Context, proxy *model.Proxy) error
+	GetByID(ctx context.Context, id int64) (*model.Proxy, error)
+	Update(ctx context.Context, proxy *model.Proxy) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.Proxy, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, protocol, status, search string) ([]model.Proxy, *pagination.PaginationResult, error)
+	ListActive(ctx context.Context) ([]model.Proxy, error)
+	ListActiveWithAccountCount(ctx context.Context) ([]model.ProxyWithAccountCount, error)
+
+	ExistsByHostPortAuth(ctx context.Context, host string, port int, username, password string) (bool, error)
+	CountAccountsByProxyID(ctx context.Context, proxyID int64) (int64, error)
+}