refactor platform logic and add gasorder domain

backend/api/internal/logic/platform/dashboard.go

@@ -0,0 +1,22 @@
+package platform
+
+import (
+	"git.apinb.com/bsm-sdk/core/infra"
+	"git.apinb.com/heqiapp/platforms/backend/api/internal/models"
+	"github.com/gin-gonic/gin"
+)
+
+// PingHello 返回匿名健康状态。
+func PingHello(ctx *gin.Context) {
+	infra.Response.Success(ctx, gin.H{"service": "platform-api", "status": "ok"})
+}
+
+// DashboardOverview 返回平台总后台的运营概览数据。
+func DashboardOverview(ctx *gin.Context) {
+	overview, err := models.GetDashboardOverview()
+	if err != nil {
+		infra.Response.Error(ctx, err)
+		return
+	}
+	infra.Response.Success(ctx, overview)
+}