fix(build): resolve stripeCustomer import - remove .ts extension, use eval('import') to prevent client bundling

- Replace 'await import(./stripeCustomer.ts)' with eval('import') pattern
- Apply same fix to serviceResolver.ts payments import
- Prevents webpack/esbuild from including server-only Stripe code in client bundle
- Resolves Netlify build failures (exit code 2)
- Fixes TypeScript allowImportingTsExtensions constraint

Refs: PR #10 fix from chore/netlify-build-fixes branch

Author: apex-ai-net

lib/supabase/serviceResolver.ts

@@ -20,7 +20,7 @@ import * as matchesService from './services/matches';
 // trying to resolve './services/payments' (and its Stripe dependencies) in the browser.
 type PaymentsServiceModule = typeof import('./services/payments');
 async function loadPaymentsService(): Promise<PaymentsServiceModule> {
-  return await import('./services/payments');
+  return await (0, eval)("import")('./services/payments') as PaymentsServiceModule;
 }
 import * as messagesService from './services/messages';
 import * as chatbotService from './services/chatbot';

lib/supabase/services/payments.ts

@@ -460,9 +460,10 @@ export async function createStudentCheckoutSession(
   // Get or create Stripe customer for this user
   let stripeCustomerId: string | undefined;
   try {
-    // Dynamically import server-only helper to avoid bundling in client code.
-    // Use explicit extension to satisfy certain bundlers/runtimes during production builds.
-    const { getOrCreateCustomer } = await import('./stripeCustomer.ts');
+    // Dynamically import server-only helper to avoid bundler static analysis in client builds.
+    // Using eval('import') prevents webpack/esbuild from pre-resolving this in the client bundle.
+    const stripeCustomerModule = await (0, eval)("import")('./stripeCustomer') as typeof import('./stripeCustomer');
+    const { getOrCreateCustomer } = stripeCustomerModule;
     stripeCustomerId = await getOrCreateCustomer(
       supabase,
       userId,