fix: fall back to local storage when HF dataset upload fails

Instead of returning an error when HF upload fails, the publish
pipeline now falls through to local storage. This ensures publish
always works even when the dataset hasn't been created yet.

Made-with: Cursor

backend/src/publisher/index.ts

@@ -136,7 +136,7 @@ export async function publishDocument(docName: string, token?: string): Promise<
     }
   }
 
-  // Upload to HF dataset
+  // Try uploading to HF dataset
   if (isHfStorageEnabled()) {
     try {
       const urls = await uploadPublishedAssets(docName, {
@@ -147,18 +147,11 @@ export async function publishDocument(docName: string, token?: string): Promise<
       }, token);
       return { ...urls, success: true };
     } catch (err) {
-      console.error("[publish] Upload failed:", err);
-      return {
-        htmlUrl: null,
-        pdfUrl: null,
-        thumbUrl: null,
-        success: false,
-        error: (err as Error).message,
-      };
+      console.warn("[publish] HF upload failed, falling back to local storage:", (err as Error).message);
     }
   }
 
-  // Local-only: save to data/published/
+  // Local storage (primary when HF disabled, fallback when HF fails)
   const { writeFileSync, mkdirSync } = await import("fs");
   const publishDir = join(DATA_DIR, "published", docName.replace(/[^a-zA-Z0-9_-]/g, "_"));
   mkdirSync(publishDir, { recursive: true });