refactor: Introduce pre-consume quota and unify relay handlers

This commit introduces a major architectural refactoring to improve quota management, centralize logging, and streamline the relay handling logic.

Key changes:
- **Pre-consume Quota:** Implements a new mechanism to check and reserve user quota *before* making the request to the upstream provider. This ensures more accurate quota deduction and prevents users from exceeding their limits due to concurrent requests.

- **Unified Relay Handlers:** Refactors the relay logic to use generic handlers (e.g., `ChatHandler`, `ImageHandler`) instead of provider-specific implementations. This significantly reduces code duplication and simplifies adding new channels.

- **Centralized Logger:** A new dedicated `logger` package is introduced, and all system logging calls are migrated to use it, moving this responsibility out of the `common` package.

- **Code Reorganization:** DTOs are generalized (e.g., `dalle.go` -> `openai_image.go`) and utility code is moved to more appropriate packages (e.g., `common/http.go` -> `service/http.go`) for better code structure.

model/user.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"one-api/common"
 	"one-api/dto"
+	"one-api/logger"
 	"strconv"
 	"strings"
 
@@ -75,7 +76,7 @@ func (user *User) GetSetting() dto.UserSetting {
 	if user.Setting != "" {
 		err := json.Unmarshal([]byte(user.Setting), &setting)
 		if err != nil {
-			common.SysError("failed to unmarshal setting: " + err.Error())
+			logger.SysError("failed to unmarshal setting: " + err.Error())
 		}
 	}
 	return setting
@@ -84,7 +85,7 @@ func (user *User) GetSetting() dto.UserSetting {
 func (user *User) SetSetting(setting dto.UserSetting) {
 	settingBytes, err := json.Marshal(setting)
 	if err != nil {
-		common.SysError("failed to marshal setting: " + err.Error())
+		logger.SysError("failed to marshal setting: " + err.Error())
 		return
 	}
 	user.Setting = string(settingBytes)
@@ -274,7 +275,7 @@ func inviteUser(inviterId int) (err error) {
 func (user *User) TransferAffQuotaToQuota(quota int) error {
 	// 检查quota是否小于最小额度
 	if float64(quota) < common.QuotaPerUnit {
-		return fmt.Errorf("转移额度最小为%s！", common.LogQuota(int(common.QuotaPerUnit)))
+		return fmt.Errorf("转移额度最小为%s！", logger.LogQuota(int(common.QuotaPerUnit)))
 	}
 
 	// 开始数据库事务
@@ -324,16 +325,16 @@ func (user *User) Insert(inviterId int) error {
 		return result.Error
 	}
 	if common.QuotaForNewUser > 0 {
-		RecordLog(user.Id, LogTypeSystem, fmt.Sprintf("新用户注册赠送 %s", common.LogQuota(common.QuotaForNewUser)))
+		RecordLog(user.Id, LogTypeSystem, fmt.Sprintf("新用户注册赠送 %s", logger.LogQuota(common.QuotaForNewUser)))
 	}
 	if inviterId != 0 {
 		if common.QuotaForInvitee > 0 {
 			_ = IncreaseUserQuota(user.Id, common.QuotaForInvitee, true)
-			RecordLog(user.Id, LogTypeSystem, fmt.Sprintf("使用邀请码赠送 %s", common.LogQuota(common.QuotaForInvitee)))
+			RecordLog(user.Id, LogTypeSystem, fmt.Sprintf("使用邀请码赠送 %s", logger.LogQuota(common.QuotaForInvitee)))
 		}
 		if common.QuotaForInviter > 0 {
 			//_ = IncreaseUserQuota(inviterId, common.QuotaForInviter)
-			RecordLog(inviterId, LogTypeSystem, fmt.Sprintf("邀请用户赠送 %s", common.LogQuota(common.QuotaForInviter)))
+			RecordLog(inviterId, LogTypeSystem, fmt.Sprintf("邀请用户赠送 %s", logger.LogQuota(common.QuotaForInviter)))
 			_ = inviteUser(inviterId)
 		}
 	}
@@ -517,7 +518,7 @@ func IsAdmin(userId int) bool {
 	var user User
 	err := DB.Where("id = ?", userId).Select("role").Find(&user).Error
 	if err != nil {
-		common.SysError("no such user " + err.Error())
+		logger.SysError("no such user " + err.Error())
 		return false
 	}
 	return user.Role >= common.RoleAdminUser
@@ -572,7 +573,7 @@ func GetUserQuota(id int, fromDB bool) (quota int, err error) {
 		if shouldUpdateRedis(fromDB, err) {
 			gopool.Go(func() {
 				if err := updateUserQuotaCache(id, quota); err != nil {
-					common.SysError("failed to update user quota cache: " + err.Error())
+					logger.SysError("failed to update user quota cache: " + err.Error())
 				}
 			})
 		}
@@ -610,7 +611,7 @@ func GetUserGroup(id int, fromDB bool) (group string, err error) {
 		if shouldUpdateRedis(fromDB, err) {
 			gopool.Go(func() {
 				if err := updateUserGroupCache(id, group); err != nil {
-					common.SysError("failed to update user group cache: " + err.Error())
+					logger.SysError("failed to update user group cache: " + err.Error())
 				}
 			})
 		}
@@ -639,7 +640,7 @@ func GetUserSetting(id int, fromDB bool) (settingMap dto.UserSetting, err error)
 		if shouldUpdateRedis(fromDB, err) {
 			gopool.Go(func() {
 				if err := updateUserSettingCache(id, setting); err != nil {
-					common.SysError("failed to update user setting cache: " + err.Error())
+					logger.SysError("failed to update user setting cache: " + err.Error())
 				}
 			})
 		}
@@ -669,7 +670,7 @@ func IncreaseUserQuota(id int, quota int, db bool) (err error) {
 	gopool.Go(func() {
 		err := cacheIncrUserQuota(id, int64(quota))
 		if err != nil {
-			common.SysError("failed to increase user quota: " + err.Error())
+			logger.SysError("failed to increase user quota: " + err.Error())
 		}
 	})
 	if !db && common.BatchUpdateEnabled {
@@ -694,7 +695,7 @@ func DecreaseUserQuota(id int, quota int) (err error) {
 	gopool.Go(func() {
 		err := cacheDecrUserQuota(id, int64(quota))
 		if err != nil {
-			common.SysError("failed to decrease user quota: " + err.Error())
+			logger.SysError("failed to decrease user quota: " + err.Error())
 		}
 	})
 	if common.BatchUpdateEnabled {
@@ -750,7 +751,7 @@ func updateUserUsedQuotaAndRequestCount(id int, quota int, count int) {
 		},
 	).Error
 	if err != nil {
-		common.SysError("failed to update user used quota and request count: " + err.Error())
+		logger.SysError("failed to update user used quota and request count: " + err.Error())
 		return
 	}
 
@@ -767,14 +768,14 @@ func updateUserUsedQuota(id int, quota int) {
 		},
 	).Error
 	if err != nil {
-		common.SysError("failed to update user used quota: " + err.Error())
+		logger.SysError("failed to update user used quota: " + err.Error())
 	}
 }
 
 func updateUserRequestCount(id int, count int) {
 	err := DB.Model(&User{}).Where("id = ?", id).Update("request_count", gorm.Expr("request_count + ?", count)).Error
 	if err != nil {
-		common.SysError("failed to update user request count: " + err.Error())
+		logger.SysError("failed to update user request count: " + err.Error())
 	}
 }
 
@@ -785,7 +786,7 @@ func GetUsernameById(id int, fromDB bool) (username string, err error) {
 		if shouldUpdateRedis(fromDB, err) {
 			gopool.Go(func() {
 				if err := updateUserNameCache(id, username); err != nil {
-					common.SysError("failed to update user name cache: " + err.Error())
+					logger.SysError("failed to update user name cache: " + err.Error())
 				}
 			})
 		}