Description

Title: feat: Allow spreading of manifest options in NextFederationPlugin

Refactors how the manifest configuration is built in NextFederationPlugin so that user-provided manifest options are merged with the plugin’s defaults instead of being ignored.

Previously, the plugin only set a conditional manifest object with filePath based on isServer (empty string for server, /static/chunks for client). Any manifest options passed into the plugin were not used.

Changes:

• The plugin now always passes a manifest object into the underlying configuration.
• User options from this._options.manifest are spread first: ...(this._options.manifest ?? {}).
• The plugin’s filePath is set after the spread so the existing behavior is preserved: filePath: isServer ? '' : '/static/chunks'.

This lets users pass custom manifest options (e.g. name, publicPath) while the plugin still controls filePath based on server vs client. The change is non-breaking and follows the same merge pattern used for shared, remotes, and exposes.

Related Issue

#4333

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the documentation.