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/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"))