Vite resolver conditions exclude Svelte-only package exports #235

Summary

Stack54's generated Vite config currently sets resolver conditions to only browser and default:

resolve: { conditions: ["browser", "default"] }

This breaks packages whose exports map exposes an entry only through the svelte condition, such as @inertiajs/svelte@2.3.23.

Reproduction

In a Stack54 app using Svelte and Inertia:

import { createInertiaApp } from "@inertiajs/svelte";

Run:

pnpm run build

Actual result

Vite fails during SSR build:

Failed to resolve entry for package "@inertiajs/svelte". The package may have incorrect main/module/exports specified in its package.json: No known conditions for "." specifier in "@inertiajs/svelte" package

The installed @inertiajs/svelte package has this root export:

{
  "exports": {
    ".": {
      "types": "./dist/index.d.ts",
      "svelte": "./dist/index.js"
    }
  }
}

Because Stack54 overrides Vite resolver conditions without including svelte, Vite has no matching runtime condition for the package root.

Expected result

Stack54 should allow Svelte package export conditions to resolve by default.

Workaround verified locally

Adding a project-level alias works:

import { fileURLToPath } from "node:url";

const inertiaSvelteEntry = fileURLToPath(
  new URL("./node_modules/@inertiajs/svelte/dist/index.js", import.meta.url),
);

export default defineConfig({
  vite: {
    resolve: {
      alias: {
        "@inertiajs/svelte": inertiaSvelteEntry,
      },
    },
  },
});

With this alias, pnpm run build passes under Node 25.

Possible fix

Include svelte in Stack54's default Vite resolver conditions, or merge with Vite/Svelte defaults instead of replacing them:

resolve: { conditions: ["svelte", "browser", "default"] }

The relevant code appears to be in dist/core/utils/vite.js / source equivalent, inside make_vite_config.