Fix circular dependency resolution by switching to artifact-centric display

- Add artifact: prefix handling in resolve_dependencies for direct artifact
  ID references, enabling dependency resolution for tagless artifacts
- Refactor PackagePage from tag-based to artifact-based data display
- Add PackageArtifact type with tags array for artifact-centric API responses
- Update download URLs to use artifact:ID prefix when no tags exist
- Conditionally show "View Ensure File" only when artifact has tags

frontend/src/api.ts

@@ -3,8 +3,8 @@ import {
   Package,
   Tag,
   TagDetail,
-  Artifact,
   ArtifactDetail,
+  PackageArtifact,
   UploadResponse,
   PaginatedResponse,
   ListParams,
@@ -276,10 +276,10 @@ export async function listPackageArtifacts(
   projectName: string,
   packageName: string,
   params: ArtifactListParams = {}
-): Promise<PaginatedResponse<Artifact & { tags: string[] }>> {
+): Promise<PaginatedResponse<PackageArtifact>> {
   const query = buildQueryString(params as Record<string, unknown>);
   const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/artifacts${query}`);
-  return handleResponse<PaginatedResponse<Artifact & { tags: string[] }>>(response);
+  return handleResponse<PaginatedResponse<PackageArtifact>>(response);
 }
 
 // Upload