已完成用户APP首期功能开发

交付用户端首期页面、配套接口、后台资源及测试文档。用户APP构建、静态分析和三个管理后台构建通过；完整测试仍有2项失败，后端模型注释检查未通过，详见交付记录。

backend/api/internal/logic/client/user/content_detail.go

@@ -0,0 +1,31 @@
+// 功能：公开安全内容详情，仅允许读取已启用发布的图文内容；版本：1.0.0。
+package user
+
+import (
+	"errors"
+	"git.apinb.com/bsm-sdk/core/errcode"
+	"git.apinb.com/bsm-sdk/core/infra"
+	"git.apinb.com/heqiapp/platforms/backend/api/internal/impl"
+	"git.apinb.com/heqiapp/platforms/backend/api/internal/logic/common"
+	"git.apinb.com/heqiapp/platforms/backend/api/internal/models"
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+// PublicSafetyContent 按公开标识重新校验发布状态，旧链接不能访问草稿和下架内容。
+func PublicSafetyContent(ctx *gin.Context) {
+	var content models.CmsContent
+	err := impl.DBService.Where("identity = ? AND status = ? AND publish_status = ? AND content_type IN ?",
+		ctx.Param("identity"), common.StatusEnable, "published", []string{"notice", "safety_article", "law"}).Take(&content).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			infra.Response.Error(ctx, errcode.ErrRecordNotFound)
+		} else {
+			infra.Response.Error(ctx, err)
+		}
+		return
+	}
+	// 白名单输出正文所需字段，避免内部主键及未来管理字段泄露。
+	infra.Response.Success(ctx, gin.H{"identity": content.Identity, "title": content.Title,
+		"body": content.Body, "content_type": content.ContentType, "version_no": content.VersionNo})
+}