fix: paginate getAllSyncedRows to fetch all products beyond the 1000 row Supabase cap

With 1005+ products, the old query returned only the top 1000 by updated_at.
Items edited long ago (like 51016DE) were silently missing from syncedData,
so the merge never applied their saved edits. Now paginate by product_id
until we exhaust the table.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.tsx

@@ -134,9 +134,6 @@ export default function App() {
           
           console.log('Fetching synced data from Supabase...');
           const syncedData = await getAllSyncedRows();
-          // TEMP DIAG
-          const d = syncedData['51016DE'];
-          console.log('[DIAG v2] 51016DE:', d ? `status=${d.status} len=${d.data?.length} [103]=${JSON.stringify(d.data?.[103])}` : 'NOT FOUND');
           
           // Extend headers with virtual columns if the Excel is shorter than the saved data.
           // COLUMNS hardcoded indices (PRODUCT_TYPE=103, ITEM_TO_LOGISTIC=104, etc.) are used

src/lib/supabase.ts

@@ -41,26 +41,35 @@ export interface SyncedRow {
 }
 
 export async function getAllSyncedRows(): Promise<Record<string, SyncedRow>> {
+  const PAGE_SIZE = 1000;
+  const result: Record<string, SyncedRow> = {};
   try {
+    let offset = 0;
+    // Paginate until Supabase returns fewer rows than PAGE_SIZE (no more pages).
+    // Supabase REST caps a single response at 1000 rows, so we must page.
+    // Safety cap at 20 pages (20k products) to avoid infinite loops.
+    for (let page = 0; page < 20; page++) {
       const response = await safeFetch(
-      `${SUPABASE_URL}/rest/v1/products?select=product_id,data,status&order=updated_at.desc&limit=1000`,
+        `${SUPABASE_URL}/rest/v1/products?select=product_id,data,status&order=product_id.asc&limit=${PAGE_SIZE}&offset=${offset}`,
         { cache: 'no-store' }
       );
 
       if (!response.ok) {
         const errText = await response.text();
         console.error('getAllSyncedRows failed:', response.status, errText);
-      return {};
+        return result;
       }
       const rows = await response.json();
-    const result: Record<string, SyncedRow> = {};
       for (const row of rows) {
         result[row.product_id] = { data: row.data, status: row.status };
       }
+      if (rows.length < PAGE_SIZE) break;
+      offset += PAGE_SIZE;
+    }
     return result;
   } catch (error) {
     console.error('Error fetching synced rows from Supabase:', error);
-    return {};
+    return result;
   }
 }