Fix Cloudflare Pages deployment - switch to Cloudflare adapter

Changes:
- Replace @astrojs/node adapter with @astrojs/cloudflare
- Add Cloudflare platformProxy configuration
- Update site URL to https://strangewater.xyz

The Node.js adapter doesn't work on Cloudflare Pages for SSR applications.
This change enables proper SSR support on Cloudflare's platform.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: rexkirshner

astro.config.mjs

@@ -1,14 +1,16 @@
 import { defineConfig } from 'astro/config';
 import tailwindcss from '@tailwindcss/vite';
 import { fileURLToPath } from 'url';
-import node from '@astrojs/node';
+import cloudflare from '@astrojs/cloudflare';
 
 // https://astro.build/config
 export default defineConfig({
-  site: 'https://my-podcast.com',
+  site: 'https://strangewater.xyz',
   output: 'server',
-  adapter: node({
-    mode: 'standalone'
+  adapter: cloudflare({
+    platformProxy: {
+      enabled: true
+    }
   }),
   vite: {
     plugins: [tailwindcss()],