feat(deploy): migrate to Cloudflare Pages, integrate Resend email API, and optimize contact form

astro.config.mjs

@@ -3,7 +3,7 @@ import { defineConfig } from 'astro/config';
 
 import react from '@astrojs/react';
 import tailwindcss from '@tailwindcss/vite';
-import vercel from '@astrojs/vercel';
+import cloudflare from '@astrojs/cloudflare';
 import basicSsl from '@vitejs/plugin-basic-ssl';
 import sitemap from '@astrojs/sitemap';
 
@@ -12,7 +12,7 @@ export default defineConfig({
   site: 'https://crischarles.com',
   trailingSlash: 'never',
   output: 'server',
-  adapter: vercel(),
+  adapter: cloudflare(),
   redirects: {
     '/projects/tis-record-management-system': '/projects/tis-rms'
   },