vite: package imports are stubbed as missing optional dependencies #11564

@nativescript/vite 8.0.17 with Octane 0.10.2 fails during iOS dev boot with Cannot find module '#octane/dist/signal-actions/graph' (also #octane/dist/signal-actions/bindings), despite valid package.json imports-map entries. The same guard is present on current main (1fe745085).

createOptionalDependencyStubEsbuildPlugin treats # specifiers as bare dependencies and probes them with a project-scoped createRequire(...).resolve(id, { paths: [dirname(importer)] }). The paths option does not change the package imports scope, so valid dependency-internal imports fail the probe and become throwing ns-optional-dep-stub modules.

Minimal reproduction: create node_modules/fixture/package.json with imports: { "#internal": "./internal.js" }, export value = 42 from internal.js, and import it from the fixture entry. Bundle through the actual optional-dependency plugin with esbuild and evaluate the output: it throws Cannot find module '#internal'.

Letting # specifiers fall through to esbuild resolves them using the importer's package scope. A regression test can also verify a genuinely absent optional dependency still throws inside try/catch and preserves the fallback. No simulator is needed.