Fix PackageArtifactResponse missing sha256 and version fields

- Add sha256 field to list_package_artifacts response (artifact ID is SHA256)
- Add version field to PackageArtifactResponse schema
- Add version field to frontend PackageArtifact type
- Update getArtifactVersion to prefer direct version field

backend/app/routes.py

@@ -4817,9 +4817,13 @@ def list_package_artifacts(
         artifact_responses.append(
             PackageArtifactResponse(
                 id=artifact.id,
+                sha256=artifact.id,  # Artifact ID is the SHA256 hash
                 size=artifact.size,
                 content_type=artifact.content_type,
                 original_name=artifact.original_name,
+                checksum_md5=artifact.checksum_md5,
+                checksum_sha1=artifact.checksum_sha1,
+                s3_etag=artifact.s3_etag,
                 created_at=artifact.created_at,
                 created_by=artifact.created_by,
                 format_metadata=artifact.format_metadata,

backend/app/schemas.py

@@ -256,6 +256,7 @@ class PackageArtifactResponse(BaseModel):
     created_at: datetime
     created_by: str
     format_metadata: Optional[Dict[str, Any]] = None
+    version: Optional[str] = None  # Version from PackageVersion if exists
 
     class Config:
         from_attributes = True

frontend/src/pages/PackagePage.tsx

@@ -313,9 +313,9 @@ function PackagePage() {
     }
   };
 
-  // Helper to get version from artifact metadata
+  // Helper to get version from artifact - prefer direct version field, fallback to metadata
   const getArtifactVersion = (a: PackageArtifact): string | null => {
-    return (a.format_metadata?.version as string) || null;
+    return a.version || (a.format_metadata?.version as string) || null;
   };
 
   // Helper to get download ref - prefer version, fallback to artifact ID

frontend/src/types.ts

@@ -58,6 +58,7 @@ export interface PackageArtifact {
   created_at: string;
   created_by: string;
   format_metadata?: Record<string, unknown> | null;
+  version?: string | null;  // Version from PackageVersion if exists
 }
 
 export interface PackageVersion {