add stable media support and sync skillhub UI

internal/server/artifact_upload_test.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
+	"io"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
@@ -21,6 +22,9 @@ func TestArtifactUploadCreatesReadableArtifactForSourceArtifactID(t *testing.T)
 	if err != nil {
 		t.Fatalf("NewWithConfig: %v", err)
 	}
+	srv := httptest.NewServer(server.Handler())
+	defer srv.Close()
+	server.cfg.PublicBaseURL = srv.URL
 
 	sessionToken, _, ok, err := server.store.createSession("sk-upload-user")
 	if err != nil {
@@ -80,9 +84,34 @@ func TestArtifactUploadCreatesReadableArtifactForSourceArtifactID(t *testing.T)
 	if envelope.Data.ID == "" {
 		t.Fatalf("expected artifact id, got %#v", envelope.Data)
 	}
+	if envelope.Data.MediaID == "" {
+		t.Fatalf("expected media id, got %#v", envelope.Data)
+	}
 	if envelope.Data.ContentType != "image/png" {
 		t.Fatalf("expected image/png, got %q", envelope.Data.ContentType)
 	}
+	if envelope.Data.URL == "" {
+		t.Fatalf("expected stable artifact url, got %#v", envelope.Data)
+	}
+	if envelope.Data.StorageStatus != "ready" {
+		t.Fatalf("expected storage status ready, got %#v", envelope.Data.StorageStatus)
+	}
+
+	contentResp, err := http.Get(envelope.Data.URL)
+	if err != nil {
+		t.Fatalf("GET media content: %v", err)
+	}
+	defer contentResp.Body.Close()
+	if contentResp.StatusCode != http.StatusOK {
+		t.Fatalf("expected media content 200, got %d", contentResp.StatusCode)
+	}
+	streamed, err := io.ReadAll(contentResp.Body)
+	if err != nil {
+		t.Fatalf("read media content: %v", err)
+	}
+	if !bytes.Equal(streamed, imageBytes) {
+		t.Fatal("expected stable media url to serve uploaded bytes")
+	}
 
 	editRef, err := server.resolveImageToImageReference(context.Background(), &job{
 		UserID:      current.User.ID,