Refactor: Fully migrated to direct PostgreSQL, implemented Public API v1, fixed Vercel deployment conflicts, and updated documentation

app/merchant/[id]/(dashboard)/page.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { supabaseAdmin } from '@/lib/supabase-admin';
+import { db } from '@/lib/db';
 import {
     TrendingUp,
     TrendingDown,
@@ -21,30 +21,23 @@ async function getMerchantData(identifier: string) {
     const isUUID = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(identifier);
 
     // Fetch merchant details
-    const query = supabaseAdmin
-        .from('merchants')
-        .select('*');
+    const mQueryText = isUUID 
+        ? 'SELECT * FROM merchants WHERE id = $1 LIMIT 1'
+        : 'SELECT * FROM merchants WHERE short_id = $1 LIMIT 1';
+    
+    const mResult = await db.query(mQueryText, [identifier]);
+    const merchant = mResult.rows[0];
 
-    if (isUUID) {
-        query.eq('id', identifier);
-    } else {
-        query.eq('short_id', identifier);
-    }
-
-    const { data: merchant, error: mError } = await query.single();
-
-    if (mError || !merchant) return null;
+    if (!merchant) return null;
 
     const id = merchant.id; // Always use UUID for internal lookups
 
     // Fetch merchant transactions
-    const { data: transactions, error: tError } = await supabaseAdmin
-        .from('transactions')
-        .select('*')
-        .eq('merchant_id', id)
-        .order('created_at', { ascending: false });
-
-    if (tError) return null;
+    const tResult = await db.query(
+        'SELECT * FROM transactions WHERE merchant_id = $1 ORDER BY created_at DESC',
+        [id]
+    );
+    const transactions = tResult.rows;
 
     const successfulTransactions = transactions.filter(t => t.status === 'succeeded');
     const totalRevenue = successfulTransactions.reduce((acc, t) => acc + Number(t.amount), 0);