分享码有效期，支持表达式

internal/config/config.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"strconv"
+	"time"
 )
 
 type Config struct {
@@ -17,7 +18,7 @@ type Config struct {
 	S3                 S3Config
 	EnablePersistTask  bool
 	ShareCodeMaxPerMac int
-	ShareCodeTTLMin    int
+	ShareCodeTTL       time.Duration
 }
 
 func Load() (*Config, error) {
@@ -49,6 +50,11 @@ func Load() (*Config, error) {
 	eq := loadEqualize(env)
 	s3cfg := loadS3(env)
 
+	shareCodeTTL, err := parseShareCodeTTL(getEnv("SHARE_CODE_TTL_MIN", "30"))
+	if err != nil {
+		return nil, fmt.Errorf("invalid SHARE_CODE_TTL_MIN: %w", err)
+	}
+
 	return &Config{
 		Env:                env,
 		Host:               getEnv("APP_HOST", "0.0.0.0"),
@@ -60,7 +66,7 @@ func Load() (*Config, error) {
 		S3:                 s3cfg,
 		EnablePersistTask:  getEnv("ENABLE_PERSIST_TASK", "false") == "true",
 		ShareCodeMaxPerMac: getEnvInt("SHARE_CODE_MAX_PER_MAC", 1),
-		ShareCodeTTLMin:    getEnvInt("SHARE_CODE_TTL_MIN", 30),
+		ShareCodeTTL:       shareCodeTTL,
 	}, nil
 }