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

app/api/mock-complete-payment/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { supabaseAdmin } from '@/lib/supabase-admin';
+import { db } from '@/lib/db';
 
 export async function POST(req: NextRequest) {
     try {
@@ -9,20 +9,11 @@ export async function POST(req: NextRequest) {
             return NextResponse.json({ error: 'Mock payments are disabled' }, { status: 403 });
         }
 
-        // Update transaction in Supabase
-        const { error } = await supabaseAdmin
-            .from('transactions')
-            .update({
-                status,
-                customer_name,
-                customer_phone
-            })
-            .eq('stripe_pi_id', clientSecret); // In mock mode, we use clientSecret as the ID
-
-        if (error) {
-            console.error('Mock update DB error:', error);
-            return NextResponse.json({ error: error.message }, { status: 500 });
-        }
+        // Update transaction in Postgres
+        await db.query(
+            'UPDATE transactions SET status = $1, customer_name = $2, customer_phone = $3 WHERE stripe_pi_id = $4',
+            [status, customer_name, customer_phone, clientSecret]
+        );
 
         return NextResponse.json({ success: true });
     } catch (err: any) {