Fix: Resolve build and rendering errors

The build process is encountering issues with large chunks and a Vercel deployment error related to the number of serverless functions. This commit aims to address these problems by optimizing code splitting and potentially reducing the number of serverless functions.

Author: lovable-dev[bot]

api/stripe.js

@@ -0,0 +1,60 @@
+// Fonction API unifiée pour toutes les opérations Stripe
+export default async function handler(req, res) {
+  const { method } = req;
+  const { action, setupIntentId } = req.query;
+
+  if (!['POST', 'GET'].includes(method)) {
+    return res.status(405).json({ error: 'Method not allowed' });
+  }
+
+  try {
+    const firebaseBaseUrl = 'https://us-central1-refspring-project.cloudfunctions.net';
+    
+    // Router vers la bonne fonction Firebase selon l'action
+    const endpointMap = {
+      'check-setup': `${firebaseBaseUrl}/stripeCheckSetup`,
+      'connect-webhook': `${firebaseBaseUrl}/stripeConnectWebhook`,
+      'create-account-link': `${firebaseBaseUrl}/stripeCreateAccountLink`,
+      'create-connect-account': `${firebaseBaseUrl}/stripeCreateConnectAccount`,
+      'create-invoice': `${firebaseBaseUrl}/stripeCreateInvoice`,
+      'create-payment-link': `${firebaseBaseUrl}/stripeCreatePaymentLink`,
+      'create-setup': `${firebaseBaseUrl}/stripeCreateSetup`,
+      'create-transfer': `${firebaseBaseUrl}/stripeCreateTransfer`,
+      'delete-payment-method': `${firebaseBaseUrl}/stripeDeletePaymentMethod`,
+      'get-payment-methods': `${firebaseBaseUrl}/stripeGetPaymentMethods`,
+      'set-default-payment-method': `${firebaseBaseUrl}/stripeSetDefaultPaymentMethod`
+    };
+
+    const endpoint = endpointMap[action];
+    if (!endpoint) {
+      return res.status(400).json({ error: 'Invalid action' });
+    }
+
+    let url = endpoint;
+    let fetchOptions = {
+      method: method,
+      headers: {
+        'Content-Type': 'application/json',
+      }
+    };
+
+    // Pour GET avec paramètres (comme check-setup)
+    if (method === 'GET' && setupIntentId) {
+      url += `?setupIntentId=${encodeURIComponent(setupIntentId)}`;
+    } else if (method === 'POST') {
+      fetchOptions.body = JSON.stringify(req.body);
+    }
+
+    const response = await fetch(url, fetchOptions);
+    const data = await response.json();
+    
+    if (!response.ok) {
+      return res.status(response.status).json(data);
+    }
+
+    res.json(data);
+  } catch (error) {
+    console.error('Stripe API error:', error);
+    res.status(500).json({ error: 'Internal server error' });
+  }
+}