fix: fallback to FilePath when FullPackagePath is empty

When old versions don't have full_package_path set, use file_path instead

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/internal/router/admin/versions.go

@@ -349,9 +349,15 @@ func handleCreateVersionGlobal(c *gin.Context) {
 			Order("id DESC").First(&lastFullVersion).Error; err == nil {
 			version.BaseVersionID = &lastFullVersion.ID
 
+			// 获取基础版本的全量包路径，如果没有则使用 FilePath
+			baseFullPackagePath := lastFullVersion.FullPackagePath
+			if baseFullPackagePath == "" {
+				baseFullPackagePath = lastFullVersion.FilePath
+			}
+
 			// 合并生成新的全量包
 			fullPkgPath, fullPkgSize, fullPkgHash, err := MergePatchWithFullPackage(
-				lastFullVersion.FullPackagePath,
+				baseFullPackagePath,
 				req.FilePath,
 				req.ApplicationID,
 			)