Fix assignment relationship and add reviewer route

Implement database migration to add foreign key constraint and index for product reviews. Update the admin assignment page query to correctly reference the foreign key. Add the missing route for the reviewer due reviews page.

Author: lovable-dev[bot]

src/App.tsx

@@ -52,6 +52,7 @@ import CompanyProductsManager from "./pages/company/ProductsManager";
 import ReviewerDashboard from "./pages/reviewer/Dashboard";
 import ReviewerGuide from "./pages/reviewer/ReviewerGuide";
 import ReviewerPreferences from "./pages/reviewer/Preferences";
+import DueReviews from "./pages/reviewer/DueReviews";
 
 // Admin Review Pages
 import ReviewRounds from "./pages/admin/ReviewRounds";
@@ -191,6 +192,11 @@ const App = () => (
                   <ReviewerDashboard />
                 </ProtectedRoute>
               } />
+              <Route path="/reviewer/due-reviews" element={
+                <ProtectedRoute allowedRoles={['reviewer', 'admin']}>
+                  <DueReviews />
+                </ProtectedRoute>
+              } />
               <Route path="/reviewer/guide" element={
                 <ProtectedRoute allowedRoles={['reviewer', 'admin']}>
                   <ReviewerGuide />

src/pages/admin/ReviewAssignment.tsx

@@ -101,7 +101,7 @@ export default function ReviewAssignment() {
       .from('product_reviews')
       .select(`
         *,
-        reviewer:profiles!assigned_to(first_name, last_name)
+        reviewer:profiles!product_reviews_assigned_to_fkey(first_name, last_name, email)
       `)
       .order('deadline', { ascending: true, nullsFirst: false });
 

supabase/migrations/20251107201521_2f82fdf4-81fe-4d5b-a567-5c6afe0552f5.sql

@@ -0,0 +1,21 @@
+-- Clean up any invalid assigned_to references
+UPDATE product_reviews pr
+SET assigned_to = NULL
+WHERE assigned_to IS NOT NULL
+  AND NOT EXISTS (SELECT 1 FROM profiles p WHERE p.id = pr.assigned_to);
+
+-- Add foreign key constraint from product_reviews.assigned_to to profiles.id
+DO $$ BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'product_reviews_assigned_to_fkey'
+  ) THEN
+    ALTER TABLE public.product_reviews
+      ADD CONSTRAINT product_reviews_assigned_to_fkey
+      FOREIGN KEY (assigned_to) REFERENCES public.profiles(id)
+      ON DELETE SET NULL;
+  END IF;
+END $$;
+
+-- Add index for better join performance
+CREATE INDEX IF NOT EXISTS idx_product_reviews_assigned_to
+ON public.product_reviews(assigned_to);