i18n: Translate all Chinese to English across the codebase

Translate Chinese comments, log/error messages, validator labels and
Swagger annotations to English throughout the source code, generated
Swagger docs, config files and CI workflows.

Make the English README primary: README.md now holds the English docs
and README_EN.md holds the Chinese version, with cross-language links
updated accordingly.

Note: the generated docs/ swagger files were translated in place; run
`go generate ./...` (swag init) to regenerate them from the now-English
annotations when a Go toolchain is available.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

http/middleware/admin.go

@@ -6,11 +6,11 @@ import (
 	"github.com/lejianwen/rustdesk-api/v2/service"
 )
 
-// BackendUserAuth 后台权限验证中间件
+// BackendUserAuth backend permission verification middleware
 func BackendUserAuth() gin.HandlerFunc {
 	return func(c *gin.Context) {
 
-		//测试先关闭
+		//disabled for testing
 		token := c.GetHeader("api-token")
 		if token == "" {
 			response.Fail(c, 403, response.TranslateMsg(c, "NeedLogin"))
@@ -34,7 +34,7 @@ func BackendUserAuth() gin.HandlerFunc {
 
 		c.Set("curUser", user)
 		c.Set("token", token)
-		//如果时间小于1天,token自动续期
+		// if the remaining time is less than 1 day, the token is auto-renewed
 		service.AllService.UserService.AutoRefreshAccessToken(ut)
 
 		c.Next()

http/middleware/cors.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 )
 
-// Cors 跨域
+// Cors CORS
 func Cors() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		origin := c.GetHeader("Origin")

http/middleware/jwt.go

@@ -9,7 +9,7 @@ import (
 
 func JwtAuth() gin.HandlerFunc {
 	return func(c *gin.Context) {
-		//测试先关闭
+		//disabled for testing
 		token := c.GetHeader("api-token")
 		if token == "" {
 			response.Fail(c, 403, response.TranslateMsg(c, "NeedLogin"))
@@ -31,7 +31,7 @@ func JwtAuth() gin.HandlerFunc {
 		user := service.AllService.UserService.InfoById(uid)
 		//user := &model.User{
 		//	Id:       uid,
-		//	Username: "测试用户",
+		//	Username: "test user",
 		//}
 		if user.Id == 0 {
 			response.Fail(c, 403, response.TranslateMsg(c, "NeedLogin"))

http/middleware/logger.go

@@ -6,7 +6,7 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-// Logger 日志中间件
+// Logger logging middleware
 func Logger() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		global.Logger.WithFields(

http/middleware/rustauth.go

@@ -9,7 +9,7 @@ import (
 func RustAuth() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		//fmt.Println(c.Request.URL, c.Request.Header)
-		//获取HTTP_AUTHORIZATION
+		//getHTTP_AUTHORIZATION
 		token := c.GetHeader("Authorization")
 		if token == "" {
 			c.JSON(401, gin.H{
@@ -25,13 +25,13 @@ func RustAuth() gin.HandlerFunc {
 			c.Abort()
 			return
 		}
-		//提取token，格式是Bearer {token}
-		//这里只是简单的提取
+		//extracttoken, format is Bearer {token}
+		//this is just a simple extraction
 		token = token[7:]
 
-		//验证token
+		// verify the token
 
-		//检查是否设置了jwt key
+		//check whether it is set jwt key
 		if len(global.Jwt.Key) > 0 {
 			uid, _ := service.AllService.UserService.VerifyJWT(token)
 			if uid == 0 {