feat: add tag aggregation mode to channels API and UI

model/channel.go

@@ -2,9 +2,10 @@ package model
 
 import (
 	"encoding/json"
-	"gorm.io/gorm"
 	"one-api/common"
 	"strings"
+
+	"gorm.io/gorm"
 )
 
 type Channel struct {
@@ -403,3 +404,9 @@ func DeleteDisabledChannel() (int64, error) {
 	result := DB.Where("status = ? or status = ?", common.ChannelStatusAutoDisabled, common.ChannelStatusManuallyDisabled).Delete(&Channel{})
 	return result.RowsAffected, result.Error
 }
+
+func GetPaginatedTags(offset int, limit int) ([]*string, error) {
+	var tags []*string
+	err := DB.Model(&Channel{}).Select("DISTINCT tag").Where("tag != ''").Offset(offset).Limit(limit).Find(&tags).Error
+	return tags, err
+}