Fix dev server not listening on 127.0.0.1

Vite's default host resolves "localhost" to the IPv6 loopback (::1)
on this machine, so it never actually bound 127.0.0.1 -- but that's
the exact address Supabase Auth's email confirmation links redirect
to (config.toml uses 127.0.0.1 throughout). Binding explicitly to
127.0.0.1 fixes confirmation links without needing to hand-edit them.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017DUU6CnxECCDeqDNYJgr5x

vite.config.ts

@@ -8,7 +8,14 @@ export default defineConfig({
   // Pinned (rather than Vite's default floating port) so local Supabase
   // Auth's redirect allow-list (supabase/config.toml) stays valid instead of
   // silently breaking if 5173 happens to be busy and Vite picks another one.
+  // Host is explicit too: Vite's default "localhost" resolves to the IPv6
+  // loopback (::1) on this machine, so it never actually listens on
+  // 127.0.0.1 — but that's exactly the address Supabase Auth's email
+  // confirmation links redirect to (config.toml uses 127.0.0.1 throughout,
+  // matching Supabase's own convention). Binding here to 127.0.0.1 instead
+  // of leaving it to resolve is what makes those links actually work.
   server: {
+    host: '127.0.0.1',
     port: 5173,
     strictPort: true,
   },