fix(publish): 补齐实体键唯一索引的测试覆盖与守卫消息

internal/repository/entity_key_unique_integration_test.go

@@ -74,4 +74,18 @@ func TestStreetEntityKeyUnique(t *testing.T) {
 	if _, err := repo.CreateStreetSnapWithImages(ctx, dup, []model.StreetSnapImage{{Image: "uniq-b.jpg", SortOrder: 1}}); err == nil {
 		t.Fatalf("同一实体键的第二行应被唯一索引拒绝，实际插入成功")
 	}
+
+	// 软删首行后，实体键不再占用（与 is_deleted = 0 的部分索引口径一致）。
+	if err := db.Model(&model.StreetSnap{}).Where("id = ?", id).Update("is_deleted", 1).Error; err != nil {
+		t.Fatalf("软删失败: %v", err)
+	}
+	again := &model.StreetSnap{JobID: 1, Title: "uniq", Year: year, City: city, Status: model.StatusPending}
+	newID, err := repo.CreateStreetSnapWithImages(ctx, again, []model.StreetSnapImage{{Image: "uniq-c.jpg", SortOrder: 1}})
+	if err != nil {
+		t.Fatalf("软删后应可再插入同实体键: %v", err)
+	}
+	t.Cleanup(func() {
+		db.Exec("DELETE FROM street_snap_images WHERE snap_id = ?", newID)
+		db.Exec("DELETE FROM street_snaps WHERE id = ?", newID)
+	})
 }