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>

service/loginLog.go

@@ -8,7 +8,7 @@ import (
 type LoginLogService struct {
 }
 
-// InfoById 根据用户id取用户信息
+// InfoById gets the login log info by id
 func (us *LoginLogService) InfoById(id uint) *model.LoginLog {
 	u := &model.LoginLog{}
 	DB.Where("id = ?", id).First(u)
@@ -29,7 +29,7 @@ func (us *LoginLogService) List(page, pageSize uint, where func(tx *gorm.DB)) (r
 	return
 }
 
-// Create 创建
+// Create create
 func (us *LoginLogService) Create(u *model.LoginLog) error {
 	res := DB.Create(u).Error
 	return res
@@ -38,7 +38,7 @@ func (us *LoginLogService) Delete(u *model.LoginLog) error {
 	return DB.Delete(u).Error
 }
 
-// Update 更新
+// Update update
 func (us *LoginLogService) Update(u *model.LoginLog) error {
 	return DB.Model(u).Updates(u).Error
 }