feat: Admin 设用户等级并展示徽章于用户页

补齐 SetUserLevel 表单；用户主页/资料页展示徽章并触发 EvaluateAuto；勾选 §H Exp 与防刷。

Co-authored-by: Cursor <cursoragent@cursor.com>

routers/web/home.go

@@ -101,6 +101,7 @@ func Register(r *gin.Engine, deps Deps, authMW *auth.AuthMiddleware) {
 		admin.POST("/users/:id/ban", deps.AdminUserBanPost)
 		admin.POST("/users/:id/verify", deps.AdminUserVerifyPost)
 		admin.POST("/users/:id/points", deps.AdminUserPointsPost)
+		admin.POST("/users/:id/level", deps.AdminUserLevelPost)
 		admin.GET("/badges", deps.AdminBadgesGet)
 		admin.POST("/badges", deps.AdminBadgeCreate)
 		admin.POST("/badges/award", deps.AdminBadgeAwardPost)