🎨 style: format all code with gofmt and lint:fix

Apply consistent code formatting across the entire codebase using
gofmt and lint:fix tools. This ensures adherence to Go community
standards and improves code readability and maintainability.

Changes include:
- Run gofmt on all .go files to standardize formatting
- Apply lint:fix to automatically resolve linting issues
- Fix code style inconsistencies and formatting violations

No functional changes were made in this commit.

controller/subscription_payment_epay.go

@@ -7,12 +7,12 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/Calcium-Ion/go-epay/epay"
 	"github.com/QuantumNous/new-api/common"
 	"github.com/QuantumNous/new-api/model"
 	"github.com/QuantumNous/new-api/service"
 	"github.com/QuantumNous/new-api/setting/operation_setting"
 	"github.com/QuantumNous/new-api/setting/system_setting"
-	"github.com/Calcium-Ion/go-epay/epay"
 	"github.com/gin-gonic/gin"
 	"github.com/samber/lo"
 )
@@ -151,4 +151,3 @@ func SubscriptionEpayReturn(c *gin.Context) {
 	}
 	c.Redirect(http.StatusFound, system_setting.ServerAddress+"/console/topup?pay=pending")
 }
-