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

app/api/webhooks/stripe/route.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { stripe } from '@/lib/stripe';
-import { supabaseAdmin } from '@/lib/supabase-admin';
+import { db } from '@/lib/db';
 
 const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET!;
 
@@ -36,15 +36,14 @@ export async function POST(req: NextRequest) {
 
 async function handlePaymentSucceeded(paymentIntent: any) {
     // 1. Update status in our DB
-    const { data: transaction, error: updateError } = await supabaseAdmin
-        .from('transactions')
-        .update({ status: 'succeeded' })
-        .eq('stripe_pi_id', paymentIntent.id)
-        .select('*')
-        .single();
+    const result = await db.query(
+        'UPDATE transactions SET status = $1 WHERE stripe_pi_id = $2 RETURNING *',
+        ['succeeded', paymentIntent.id]
+    );
+    const transaction = result.rows[0];
 
-    if (updateError) {
-        console.error('Error updating transaction success:', updateError);
+    if (!transaction) {
+        console.error('Transaction not found for success webhook:', paymentIntent.id);
         return;
     }
 
@@ -78,12 +77,8 @@ async function handlePaymentSucceeded(paymentIntent: any) {
 }
 
 async function handlePaymentFailed(paymentIntent: any) {
-    const { error } = await supabaseAdmin
-        .from('transactions')
-        .update({ status: 'failed' })
-        .eq('stripe_pi_id', paymentIntent.id);
-
-    if (error) {
-        console.error('Error updating transaction failure:', error);
-    }
+    await db.query(
+        'UPDATE transactions SET status = $1 WHERE stripe_pi_id = $2',
+        ['failed', paymentIntent.id]
+    );
 }