feat: Add self-use mode for model ratio and price configuration

- Introduce `SelfUseModeEnabled` setting to allow flexible model ratio configuration
- Update error handling to provide more informative messages when model ratios are not set
- Modify pricing and relay logic to support self-use mode
- Add UI toggle for enabling self-use mode in operation settings
- Implement fallback mechanism for model ratios when self-use mode is enabled

controller/channel-test.go

@@ -18,6 +18,7 @@ import (
 	relaycommon "one-api/relay/common"
 	"one-api/relay/constant"
 	"one-api/service"
+	"one-api/setting"
 	"strconv"
 	"strings"
 	"sync"
@@ -145,12 +146,12 @@ func testChannel(channel *model.Channel, testModel string) (err error, openAIErr
 	if err != nil {
 		return err, nil
 	}
-	modelPrice, usePrice := common.GetModelPrice(testModel, false)
-	modelRatio, success := common.GetModelRatio(testModel)
+	modelPrice, usePrice := setting.GetModelPrice(testModel, false)
+	modelRatio, success := setting.GetModelRatio(testModel)
 	if !usePrice && !success {
-		return fmt.Errorf("模型 %s 倍率和价格均未设置", testModel), nil
+		return fmt.Errorf("模型 %s 倍率和价格均未设置，请设置或者开启自用模式", testModel), nil
 	}
-	completionRatio := common.GetCompletionRatio(testModel)
+	completionRatio := setting.GetCompletionRatio(testModel)
 	ratio := modelRatio
 	quota := 0
 	if !usePrice {

controller/pricing.go

@@ -2,7 +2,6 @@ package controller
 
 import (
 	"github.com/gin-gonic/gin"
-	"one-api/common"
 	"one-api/model"
 	"one-api/setting"
 )
@@ -40,7 +39,7 @@ func GetPricing(c *gin.Context) {
 }
 
 func ResetModelRatio(c *gin.Context) {
-	defaultStr := common.DefaultModelRatio2JSONString()
+	defaultStr := setting.DefaultModelRatio2JSONString()
 	err := model.UpdateOption("ModelRatio", defaultStr)
 	if err != nil {
 		c.JSON(200, gin.H{
@@ -49,7 +48,7 @@ func ResetModelRatio(c *gin.Context) {
 		})
 		return
 	}
-	err = common.UpdateModelRatioByJSONString(defaultStr)
+	err = setting.UpdateModelRatioByJSONString(defaultStr)
 	if err != nil {
 		c.JSON(200, gin.H{
 			"success": false,