补齐 HTTP 层：实现用户模块、路由与中间件接线、COS 上传及优雅启动

- 新增用户与上传错误码文件及 Recovery 中间件
- 修复 router.go 导入与中间件链，注册用户路由并补 handler 错误码导入
- 补充用户状态常量与 UserGetByWechatOpenID 查询，修订刷新令牌 dto
- 移除 upload 包 OTel 调用，新增 FileUploadCos 上传封装
- 实现 UserService 微信登录/刷新令牌/我的信息/改资料/上传头像
- 裁剪 main.go 配置段并移除 OTel 桥接，补启动与优雅退出
- 新增 configs 示例配置、global 配置结构及 go.mod 依赖

internal/middleware/lzcwyjwt.go

@@ -0,0 +1,75 @@
+package middleware
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"strings"
+
+	"git.lzcwy.cn/zhengchiliu/zt-online-game-backend/pkg/app"
+	"git.lzcwy.cn/zhengchiliu/zt-online-game-backend/pkg/errcode"
+	"git.lzcwy.cn/zhengchiliu/zt-online-game-backend/pkg/lzcwyjwt"
+	"github.com/gin-gonic/gin"
+)
+
+type ctxKey string
+
+const (
+	userIDKey ctxKey = "userID"
+)
+
+func JWTAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		response := app.NewResponse(c)
+
+		// 1. 从 Authorization 头取 token：Bearer xxx.yyy.zzz
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			slog.WarnContext(c.Request.Context(), "jwt auth: authorization header missing",
+				"method", c.Request.Method, "path", c.Request.URL.Path, "ip", c.ClientIP())
+			response.ToErrorResponse(errcode.UnauthorizedTokenMissing)
+			c.Abort()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			slog.WarnContext(c.Request.Context(), "jwt auth: invalid authorization format",
+				"method", c.Request.Method, "path", c.Request.URL.Path, "ip", c.ClientIP())
+			response.ToErrorResponse(errcode.UnauthorizedTokenError.WithDetails("invalid Authorization format"))
+			c.Abort()
+			return
+		}
+
+		// 2. 解析 token
+		claims, err := lzcwyjwt.ParseAccessToken(parts[1])
+		if err != nil {
+			switch {
+			case errors.Is(err, lzcwyjwt.ErrTokenExpired):
+				slog.InfoContext(c.Request.Context(), "jwt auth: token expired", "path", c.Request.URL.Path)
+				response.ToErrorResponse(errcode.UnauthorizedTokenTimeout)
+			case errors.Is(err, lzcwyjwt.ErrTokenWrongType):
+				slog.WarnContext(c.Request.Context(), "jwt auth: token type mismatch", "path", c.Request.URL.Path)
+				response.ToErrorResponse(errcode.UnauthorizedTokenError.WithDetails("token type mismatch"))
+			default:
+				slog.WarnContext(c.Request.Context(), "jwt auth: parse token failed",
+					"path", c.Request.URL.Path, "ip", c.ClientIP(), "error", err)
+				response.ToErrorResponse(errcode.UnauthorizedTokenError.WithDetails(err.Error()))
+			}
+			c.Abort()
+			return
+		}
+
+		// 4. 把 userID注入 context
+		ctx := context.WithValue(c.Request.Context(), userIDKey, claims.UserID)
+		c.Request = c.Request.WithContext(ctx)
+
+		c.Next()
+	}
+}
+
+// GetUserID 从 context 取登录用户 ID（在 handler 里用）
+func GetUserID(ctx context.Context) (int64, bool) {
+	uid, ok := ctx.Value(userIDKey).(int64)
+	return uid, ok
+}