feat: 初始化后端服务骨架，包含配置加载、数据库连接、Redis集成及消息队列任务处理。

cmd/server/main.go

@@ -5,7 +5,6 @@ import (
 	"log"
 	"os"
 	"path/filepath"
-	"time"
 
 	"accounting-app/internal/cache"
 	"accounting-app/internal/config"
@@ -125,8 +124,8 @@ func main() {
 			ctx,
 			redisClient.Client(),
 			db,
-			5*time.Second, // Poll interval: 检查延迟任务的间隔
-			2,             // Worker count: 并发处理任务的数量
+			cfg.MQPollInterval, // Poll interval from config
+			cfg.MQWorkerCount,  // Worker count from config
 		)
 		if err != nil {
 			log.Printf("Warning: Failed to initialize recurring task system: %v", err)

internal/config/config.go

@@ -58,6 +58,10 @@ type Config struct {
 	MaxImageSize      int64
 	AllowedImageTypes string
 	MaxImagesPerTx    int
+
+	// Task Queue configuration
+	MQWorkerCount  int
+	MQPollInterval time.Duration
 }
 
 // Load loads configuration from environment variables
@@ -113,6 +117,10 @@ func Load() *Config {
 		MaxImageSize:      getEnvInt64("MAX_IMAGE_SIZE", 10*1024*1024), // 10MB
 		AllowedImageTypes: getEnv("ALLOWED_IMAGE_TYPES", "image/jpeg,image/png,image/heic"),
 		MaxImagesPerTx:    getEnvInt("MAX_IMAGES_PER_TX", 9),
+
+		// Task Queue
+		MQWorkerCount:  getEnvInt("MQ_WORKER_COUNT", 2),
+		MQPollInterval: getEnvDuration("MQ_POLL_INTERVAL", 5*time.Second),
 	}
 
 	// Ensure data directory exists

internal/mq/logger.go

@@ -0,0 +1,67 @@
+package mq
+
+import (
+	"fmt"
+	"log"
+)
+
+// LogLevel 日志级别
+type LogLevel string
+
+const (
+	LevelInfo  LogLevel = "INFO"
+	LevelError LogLevel = "ERROR"
+	LevelWarn  LogLevel = "WARN"
+)
+
+// Logger 简单的结构化日志封装
+// 格式: [Component] [Level] Message key1=value1 key2=value2
+type Logger struct {
+	Component string
+}
+
+func NewLogger(component string) *Logger {
+	return &Logger{Component: component}
+}
+
+func (l *Logger) Info(msg string, keysAndValues ...interface{}) {
+	l.log(LevelInfo, msg, keysAndValues...)
+}
+
+func (l *Logger) Warn(msg string, keysAndValues ...interface{}) {
+	l.log(LevelWarn, msg, keysAndValues...)
+}
+
+func (l *Logger) Error(msg string, keysAndValues ...interface{}) {
+	l.log(LevelError, msg, keysAndValues...)
+}
+
+func (l *Logger) log(level LogLevel, msg string, args ...interface{}) {
+	// 构建 key=value 字符串
+	var kvStr string
+	for i := 0; i < len(args); i += 2 {
+		key := args[i]
+		var val interface{} = ""
+		if i+1 < len(args) {
+			val = args[i+1]
+		}
+		if kvStr != "" {
+			kvStr += " "
+		}
+		kvStr += logFormatKV(key, val)
+	}
+
+	if kvStr != "" {
+		log.Printf("[%s] [%s] %s %s", l.Component, level, msg, kvStr)
+	} else {
+		log.Printf("[%s] [%s] %s", l.Component, level, msg)
+	}
+}
+
+func logFormatKV(key, val interface{}) string {
+	return logStr(key) + "=" + logStr(val)
+}
+
+func logStr(v interface{}) string {
+	return fmt.Sprint(v)
+}