server: Go 服务器（REST+WSS 网关+JWT+Argon2+配对+素材直链+任务状态机）；修复并发下线 send-on-closed-channel、下发查询 SQL 优先级、配对码原子占用、上传体积上限、JWT 默认密钥告警

server/internal/api/handlers/notify.go

@@ -0,0 +1,25 @@
+package handlers
+
+import (
+	"gorm.io/gorm"
+
+	"everypublish/server/internal/models"
+)
+
+// Notify 写入站内通知（批量用户）
+func Notify(db *gorm.DB, wsid uint64, userIDs []uint64, kind, title, content string) error {
+	if len(userIDs) == 0 {
+		return nil
+	}
+	rows := make([]models.Notification, 0, len(userIDs))
+	for _, uid := range userIDs {
+		rows = append(rows, models.Notification{
+			WorkspaceID: wsid,
+			UserID:      uid,
+			Kind:        kind,
+			Title:       title,
+			Content:     content,
+		})
+	}
+	return db.Create(&rows).Error
+}