* feat: external only Source Phase imports support

* docs

* fixup

* fix: update source phase test configs to match error output

Add missing url fields and fix message text to match the updated
logSourcePhaseFormatUnsupported and logNonExternalSourcePhaseImport
functions in src/utils/logs.ts.

* Remove unnecessary fields

* Improve coverage

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* chore(deps): lock file maintenance

* Resolve audit

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fix(deps): update swc monorepo

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* chore(deps): update dependency typescript to v6

* Prevent TypeScript updates until all dependencies support it

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… (#6274) (#6286)

* fix: skip dropping side-effects on namespaceReexportsByName cache hit (#6274)

When multiple entries reference the same variable via a namespace re-export,
the `namespaceReexportsByName` cache was returning early. This prevented
`getVariableFromNamespaceReexports` from capturing the side-effect
dependencies for the subsequent importers, leading to dropped side effects
(such as CSS imports).

This fix explicitly re-invokes `getVariableFromNamespaceReexports` when
the cache is hit and an `importerForSideEffects` is provided, utilizing
its traversal to correctly link side effects to the new importer, while
ignoring the return value.

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

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* refactor: cache side-effect metadata to avoid re-traversal on namespaceReexportsByName cache hit

Replace the re-traversal approach with a parallel `namespaceSideEffectsByName` cache
that stores the collected side-effect modules and cyclic reexporters on first resolution.
Cache hits now replay the stored metadata for each importer directly, avoiding redundant
graph traversal while preserving correct side-effect tracking across multiple importers.

Update the test to cover the multi-entry scenario where two entries resolve the same
export through the namespace reexport cache.

* Simplify implementation and add missing tests

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