fix(webpack-bundler-runtime): preserve share scopes on repeated init

[2heal1]

Reuse an existing non-default share scope when repeated container init receives an incomplete host shareScopeMap instead of overwriting it with an empty scope or the wrong fallback.

Add a regression test covering repeated init with empty and missing custom share-scope entries, and keep the related initContainerEntry array/non-array test suites green.

Description

Related Issue

#4691

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.

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commit: 47dccec

[github-actions]

Bundle Size Report

11 package(s) changed, 28 unchanged.

Package dist + ESM entry

Package	Total dist (raw)	Delta	ESM gzip	Delta
@module-federation/cli	26.3 kB	no change	786 B	no change
@module-federation/core	39.1 kB	no change	173 B	no change
@module-federation/devtools	487.9 kB	no change	3.9 kB	no change
@module-federation/enhanced	806.6 kB	no change	672 B	no change
@module-federation/managers	69.8 kB	no change	334 B	no change
@module-federation/manifest	136.1 kB	no change	182 B	no change
@module-federation/metro-plugin-rnc-cli	0 B	no change	314 B	no change
@module-federation/node	193.4 kB	no change	217 B	no change
@module-federation/storybook-addon	77.6 kB	no change	100 B	no change
@module-federation/utilities	110.6 kB	no change	328 B	no change
@module-federation/webpack-bundler-runtime	95.4 kB	+1.5 kB (+1.6%)	405 B	no change

Bundle targets

Package	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta
@module-federation/cli	2.3 kB	-30 B (-1.3%)	2.3 kB	-30 B (-1.3%)
@module-federation/core	1.1 kB	-30 B (-2.7%)	1.0 kB	-29 B (-2.7%)
@module-federation/devtools	21.3 kB	-25 B (-0.1%)	21.3 kB	-25 B (-0.1%)
@module-federation/enhanced	2.6 kB	-42 B (-1.5%)	2.6 kB	-42 B (-1.5%)
@module-federation/managers	2.4 kB	-25 B (-1.0%)	2.4 kB	-25 B (-1.0%)
@module-federation/manifest	6.1 kB	-38 B (-0.6%)	6.1 kB	-38 B (-0.6%)
@module-federation/metro-plugin-rnc-cli	411 B	-25 B (-5.7%)	411 B	-25 B (-5.7%)
@module-federation/node	9.2 kB	-26 B (-0.3%)	9.2 kB	-26 B (-0.3%)
@module-federation/storybook-addon	1.9 kB	-21 B (-1.1%)	1.7 kB	-22 B (-1.2%)
@module-federation/utilities	2.6 kB	-30 B (-1.1%)	2.6 kB	-30 B (-1.1%)
@module-federation/webpack-bundler-runtime	4.1 kB	+113 B (+2.7%)	4.1 kB	+113 B (+2.7%)

Tree-shakable entrypoints

Package	Export	Entry gzip	Delta	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta	Gap (node-web)	Delta
@module-federation/webpack-bundler-runtime	./bundler	151 B	no change	4.1 kB	+113 B (+2.7%)	4.1 kB	+113 B (+2.7%)	0 B	0 B

Consumer scenarios

Scenario	Web output (gzip)	Delta	Node output (gzip)	Delta	Gap (node-web)	Delta
Enhanced remoteEntry	19.8 kB	+84 B (+0.4%)	20.9 kB	+89 B (+0.4%)	+1.0 kB	+5 B

Total dist (raw): 6.20 MB (+1.5 kB (+0.0%))
Total ESM gzip: 73.8 kB (no change)
Total web bundle (gzip): 177.6 kB (-179 B (-0.1%))
Total node bundle (gzip): 178.0 kB (-179 B (-0.1%))
Tracked ./bundler entry gzip: 556 B (no change)
Tracked ./bundler web bundle (gzip): 4.9 kB (+113 B (+2.3%))
Tracked ./bundler node bundle (gzip): 4.9 kB (+113 B (+2.3%))

Bundle sizes are generated with rslib (Rspack). Package-root metrics preserve the historical report. Tracked subpath exports such as ./bundler are measured separately so ENV_TARGET-driven tree-shaking is visible. Bare imports are externalized to keep package-level sizes consistent, and assets are emitted as resources.