fix: load .env in local development

backend/cmd/main.go

@@ -12,9 +12,16 @@ import (
 	"os"
 	"strconv"
 	"time"
+
+	"github.com/joho/godotenv"
 )
 
 func main() {
+	// 加载 .env（本地开发）
+	if err := godotenv.Load(); err != nil {
+		log.Println(".env not found; continuing")
+	}
+
 	// 加载配置
 	configPath := os.Getenv("CONFIG_PATH")
 	if configPath == "" {

backend/go.mod

@@ -3,9 +3,11 @@ module feedsystem_video_go
 go 1.24.5
 
 require (
+	github.com/alicebob/miniredis/v2 v2.37.0
 	github.com/gin-gonic/gin v1.11.0
 	github.com/go-sql-driver/mysql v1.8.1
 	github.com/golang-jwt/jwt/v5 v5.3.0
+	github.com/joho/godotenv v1.5.1
 	github.com/rabbitmq/amqp091-go v1.10.0
 	github.com/redis/go-redis/v9 v9.17.2
 	golang.org/x/crypto v0.40.0
@@ -14,10 +16,7 @@ require (
 	gorm.io/gorm v1.31.1
 )
 
-require (
-	github.com/alicebob/miniredis/v2 v2.37.0 // indirect
-	github.com/yuin/gopher-lua v1.1.1 // indirect
-)
+require github.com/yuin/gopher-lua v1.1.1 // indirect
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect

backend/go.sum

@@ -48,6 +48,8 @@ github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=