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.

main.go

@@ -8,6 +8,7 @@ import (
 	"one-api/common"
 	"one-api/constant"
 	"one-api/controller"
+	"one-api/logger"
 	"one-api/middleware"
 	"one-api/model"
 	"one-api/router"
@@ -35,22 +36,22 @@ func main() {
 
 	err := InitResources()
 	if err != nil {
-		common.FatalLog("failed to initialize resources: " + err.Error())
+		logger.FatalLog("failed to initialize resources: " + err.Error())
 		return
 	}
 
-	common.SysLog("New API " + common.Version + " started")
+	logger.SysLog("New API " + common.Version + " started")
 	if os.Getenv("GIN_MODE") != "debug" {
 		gin.SetMode(gin.ReleaseMode)
 	}
 	if common.DebugEnabled {
-		common.SysLog("running in debug mode")
+		logger.SysLog("running in debug mode")
 	}
 
 	defer func() {
 		err := model.CloseDB()
 		if err != nil {
-			common.FatalLog("failed to close database: " + err.Error())
+			logger.FatalLog("failed to close database: " + err.Error())
 		}
 	}()
 
@@ -59,18 +60,18 @@ func main() {
 		common.MemoryCacheEnabled = true
 	}
 	if common.MemoryCacheEnabled {
-		common.SysLog("memory cache enabled")
-		common.SysError(fmt.Sprintf("sync frequency: %d seconds", common.SyncFrequency))
+		logger.SysLog("memory cache enabled")
+		logger.SysError(fmt.Sprintf("sync frequency: %d seconds", common.SyncFrequency))
 
 		// Add panic recovery and retry for InitChannelCache
 		func() {
 			defer func() {
 				if r := recover(); r != nil {
-					common.SysError(fmt.Sprintf("InitChannelCache panic: %v, retrying once", r))
+					logger.SysError(fmt.Sprintf("InitChannelCache panic: %v, retrying once", r))
 					// Retry once
 					_, _, fixErr := model.FixAbility()
 					if fixErr != nil {
-						common.FatalLog(fmt.Sprintf("InitChannelCache failed: %s", fixErr.Error()))
+						logger.FatalLog(fmt.Sprintf("InitChannelCache failed: %s", fixErr.Error()))
 					}
 				}
 			}()
@@ -89,14 +90,14 @@ func main() {
 	if os.Getenv("CHANNEL_UPDATE_FREQUENCY") != "" {
 		frequency, err := strconv.Atoi(os.Getenv("CHANNEL_UPDATE_FREQUENCY"))
 		if err != nil {
-			common.FatalLog("failed to parse CHANNEL_UPDATE_FREQUENCY: " + err.Error())
+			logger.FatalLog("failed to parse CHANNEL_UPDATE_FREQUENCY: " + err.Error())
 		}
 		go controller.AutomaticallyUpdateChannels(frequency)
 	}
 	if os.Getenv("CHANNEL_TEST_FREQUENCY") != "" {
 		frequency, err := strconv.Atoi(os.Getenv("CHANNEL_TEST_FREQUENCY"))
 		if err != nil {
-			common.FatalLog("failed to parse CHANNEL_TEST_FREQUENCY: " + err.Error())
+			logger.FatalLog("failed to parse CHANNEL_TEST_FREQUENCY: " + err.Error())
 		}
 		go controller.AutomaticallyTestChannels(frequency)
 	}
@@ -110,7 +111,7 @@ func main() {
 	}
 	if os.Getenv("BATCH_UPDATE_ENABLED") == "true" {
 		common.BatchUpdateEnabled = true
-		common.SysLog("batch update enabled with interval " + strconv.Itoa(common.BatchUpdateInterval) + "s")
+		logger.SysLog("batch update enabled with interval " + strconv.Itoa(common.BatchUpdateInterval) + "s")
 		model.InitBatchUpdater()
 	}
 
@@ -119,13 +120,13 @@ func main() {
 			log.Println(http.ListenAndServe("0.0.0.0:8005", nil))
 		})
 		go common.Monitor()
-		common.SysLog("pprof enabled")
+		logger.SysLog("pprof enabled")
 	}
 
 	// Initialize HTTP server
 	server := gin.New()
 	server.Use(gin.CustomRecovery(func(c *gin.Context, err any) {
-		common.SysError(fmt.Sprintf("panic detected: %v", err))
+		logger.SysError(fmt.Sprintf("panic detected: %v", err))
 		c.JSON(http.StatusInternalServerError, gin.H{
 			"error": gin.H{
 				"message": fmt.Sprintf("Panic detected, error: %v. Please submit a issue here: https://github.com/Calcium-Ion/new-api", err),
@@ -155,7 +156,7 @@ func main() {
 	}
 	err = server.Run(":" + port)
 	if err != nil {
-		common.FatalLog("failed to start HTTP server: " + err.Error())
+		logger.FatalLog("failed to start HTTP server: " + err.Error())
 	}
 }
 
@@ -164,14 +165,14 @@ func InitResources() error {
 	// This is a placeholder function for future resource initialization
 	err := godotenv.Load(".env")
 	if err != nil {
-		common.SysLog("未找到 .env 文件，使用默认环境变量，如果需要，请创建 .env 文件并设置相关变量")
-		common.SysLog("No .env file found, using default environment variables. If needed, please create a .env file and set the relevant variables.")
+		logger.SysLog("未找到 .env 文件，使用默认环境变量，如果需要，请创建 .env 文件并设置相关变量")
+		logger.SysLog("No .env file found, using default environment variables. If needed, please create a .env file and set the relevant variables.")
 	}
 
 	// 加载环境变量
 	common.InitEnv()
 
-	common.SetupLogger()
+	logger.SetupLogger()
 
 	// Initialize model settings
 	ratio_setting.InitRatioSettings()
@@ -183,7 +184,7 @@ func InitResources() error {
 	// Initialize SQL Database
 	err = model.InitDB()
 	if err != nil {
-		common.FatalLog("failed to initialize database: " + err.Error())
+		logger.FatalLog("failed to initialize database: " + err.Error())
 		return err
 	}