feat: Implement submission reset functionality

src/lib/submissionItemsService.ts

@@ -733,6 +733,45 @@ function resolveDependencies(data: any, dependencyMap: Map<string, string>): any
   return resolved;
 }
 
+/**
+ * Reset rejected items back to pending status
+ */
+export async function resetRejectedItemsToPending(
+  submissionId: string
+): Promise<void> {
+  // Reset rejected submission items to pending
+  const { error: itemsError } = await supabase
+    .from('submission_items')
+    .update({
+      status: 'pending',
+      rejection_reason: null,
+      updated_at: new Date().toISOString()
+    })
+    .eq('submission_id', submissionId)
+    .eq('status', 'rejected');
+
+  if (itemsError) {
+    throw new Error(`Failed to reset items: ${itemsError.message}`);
+  }
+
+  // Reset parent submission to pending
+  const { error: submissionError } = await supabase
+    .from('content_submissions')
+    .update({
+      status: 'pending',
+      reviewed_at: null,
+      reviewer_id: null,
+      reviewer_notes: null,
+      updated_at: new Date().toISOString()
+    })
+    .eq('id', submissionId)
+    .in('status', ['rejected', 'partially_approved']);
+
+  if (submissionError) {
+    throw new Error(`Failed to reset submission: ${submissionError.message}`);
+  }
+}
+
 /**
  * Reject multiple items with optional cascade to dependents
  */