[codex] fix Vitest Node WASM package export

[zxch3n]

Summary

Fix loro-crdt package resolution for Node/Vitest bare imports by adding a node condition before the root import condition. This makes Node test runners resolve to the existing nodejs WASM entry instead of the bundler WASM entry.

The bundler smoke tests now exercise a stronger Loro scenario across generated apps: new Loro(), getMap(), ensureMergeableText(), text insertion, and toJSON() verification. A new vitest-node smoke case covers the issue #1005 path by installing loro-crdt into a temporary Vitest project and importing it by package name from node_modules.

Root Cause

loro-crdt@1.13.0 added conditional exports where ESM import resolved to ./bundler/index.js. Vitest externalizes dependencies in node_modules, so Node loaded the bundler WASM entry directly and hit undefined.memory during WASM startup. The Node-specific package condition should resolve to the Node entry before the generic import condition.

Validation

• node --check examples/bundler-smoke-tests/scripts/run.mjs
• node --check examples/bundler-smoke-tests/scripts/browser-runtime.mjs
• node --check examples/bundler-smoke-tests/scripts/dev-runtime.mjs
• Reproduced failure with LORO_SMOKE_PACKAGE=loro-crdt@1.13.0 pnpm --dir examples/bundler-smoke-tests run test vitest-node
• Simulated the package export fix in the temporary Vitest install and confirmed loro-crdt resolves to nodejs/index.js and the Vitest test passes
• pnpm exec vite build in the generated vite7 smoke project still emits the browser WASM asset
• pnpm --dir examples/bundler-smoke-tests exec node ./scripts/browser-runtime.mjs vite7 passes with {"map":{"text":"mergeable-smoke"}}

[github-actions]

WASM Size Report

• Original size: 3029.88 KB
• Gzipped size: 999.17 KB
• Brotli size: 701.74 KB