feat: persistent validation visibility in DimensionsView and selection fixes

src/lib/supabase.ts

@@ -21,6 +21,9 @@ export async function saveRowToSupabase(articleNo: string, rowData: ExcelRow) {
     });
 
     if (!response.ok) {
+        const errorData = await response.json().catch(() => ({}));
+        console.error('Initial PATCH failed:', response.status, errorData);
+
         // If PATCH didn't find the record, try UPSERT
         const upsertResponse = await fetch(`${SUPABASE_URL}/rest/v1/products_sync`, {
           method: 'POST',
@@ -37,7 +40,13 @@ export async function saveRowToSupabase(articleNo: string, rowData: ExcelRow) {
             updated_at: new Date().toISOString()
           })
         });
-        return upsertResponse.ok;
+
+        if (!upsertResponse.ok) {
+          const upsertError = await upsertResponse.json().catch(() => ({}));
+          console.error('UPSERT failed:', upsertResponse.status, upsertError);
+          return false;
+        }
+        return true;
     }
     return true;
   } catch (error) {