[jasonkuhrt]

Summary

Reading task or tool settings from vite.config.* currently runs Vite's full config-resolution pipeline. A plugin's config or configResolved hook can therefore fail a metadata read, and Vite resolves dev-server options that the metadata consumer never uses.

Issue #2845 traced this path to the read of pnpm's node_modules/.modules.yaml. Automatic task input tracking originally made changes to installation timestamps and machine-specific paths invalidate cached tasks. Current main already contains vite-task#850, which fingerprints only the manifest's existence. This change removes the unnecessary resolution path itself.

Use Vite's public loadConfigFromFile inside the existing metadata-resolution guard. Preserve config discovery, workspace traversal, the loaded config path, async/function configs, and the existing build / development evaluation defaults. Preserve NODE_ENV initialization, including Vite Task's tracked environment lookup. Return the user config instead of a fully resolved Vite config.

The public resolveConfig export and dev/build/preview paths retain full resolution. Metadata fields supplied by plugin hooks will no longer be populated on this path.

Validation

• pnpm -F vite-plus build: passed, including JS/declarations and the native binding.
• vp test run packages/cli: 90 files passed; 2,370 tests passed, one skipped.
• pnpm test:unit: 113 files passed; 2,557 tests passed, one skipped.
• vp check and pnpm tsgo: passed.
• Eight new cases cover skipped plugin hooks, equal metadata across equivalent pnpm manifest states, async-config environment defaults, missing configs, workspace traversal, and full resolution after metadata loading.
• The two central regressions fail with the original loader and pass with this change. Full-resolution controls still run plugin hooks and include each installation's virtual-store path in server.fs.allow.

Oxlint and Oxfmt need a separate Oxc change: their shared loader calls the public resolveConfig export directly and does not use this internal helper.

Refs #2845