新增: AI工单处理工作台 v1.0

- Go Gin 后端 (19个源文件): 认证、工单CRUD、GLM AI分析、状态流转、备注、操作日志
- Arco Design Vue 前端: 登录、工单列表/详情/创建、AI分析触发与确认
- MySQL 5表: ticket_user/ticket_info/ticket_ai_analysis/ticket_operation_log/ticket_note
- 部署: tk.1216.top HTTPS, Nginx反代

backend/internal/service/auth_service.go

@@ -0,0 +1,46 @@
+package service
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+
+	"github.com/casehub/ticket-workbench/internal/model"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+var sessions = make(map[string]*model.TicketUser)
+
+func MD5Hash(text string) string {
+	hash := md5.Sum([]byte(text))
+	return hex.EncodeToString(hash[:])
+}
+
+func Login(db *gorm.DB, account, password string) (*model.TicketUser, string, error) {
+	var user model.TicketUser
+	err := db.Where("account = ? AND status = 1", account).First(&user).Error
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return nil, "", fmt.Errorf("账号或密码错误")
+		}
+		return nil, "", err
+	}
+
+	if user.Password != MD5Hash(password) {
+		return nil, "", fmt.Errorf("账号或密码错误")
+	}
+
+	sessionID := uuid.New().String()
+	sessions[sessionID] = &user
+
+	return &user, sessionID, nil
+}
+
+func Logout(sessionID string) {
+	delete(sessions, sessionID)
+}
+
+func GetUserBySession(sessionID string) *model.TicketUser {
+	return sessions[sessionID]
+}