fix: Add global Buffer polyfill to vite.config.ts

vite.config.ts

@@ -24,6 +24,18 @@ export default defineConfig({
       }
     }
   ],
+  resolve: {
+    alias: {
+      buffer: 'buffer',
+    }
+  },
+  optimizeDeps: {
+    esbuildOptions: {
+      define: {
+        global: 'globalThis'
+      }
+    }
+  },
   base: '/',  // Always use root, since we're Cloudflare Pages only
   publicDir: 'public',  // ← Explicitly set (should be default)
   build: {
@@ -34,5 +46,6 @@ export default defineConfig({
     '__APP_VERSION__': JSON.stringify(appVersion),
     '__BUILD_HASH__': JSON.stringify(gitHash),
     '__BUILD_TIMESTAMP__': JSON.stringify(new Date().toISOString()),
+    'global': 'globalThis',
   }
 })