fix(react-tags): decouple useTagGroupBase_unstable from Tabster

[mainframev]

Stack

This PR is part of a 3-PR stack. Review and merge bottom-up:

1. 👉 fix(react-tags): decouple useTagGroupBase_unstable from Tabster #36228 — feat(react-tags): decouple useTagGroupBase_unstable from Tabster + export contexts (base: master) — merge first
2. test(react-tags): add hook regression tests for Tag family #36229 — test(react-tags): add hook regression tests for Tag family (base: fix(react-tags): decouple useTagGroupBase_unstable from Tabster #36228) — depends on fix(react-tags): decouple useTagGroupBase_unstable from Tabster #36228
3. feat(react-headless-components-preview): add Tag family #36230 — feat(react-headless-components-preview): add Tag family (base: test(react-tags): add hook regression tests for Tag family #36229) — merge last; depends on test(react-tags): add hook regression tests for Tag family #36229

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Summary

• Decouples useTagGroupBase_unstable from @fluentui/react-tabster and @fluentui/react-shared-contexts. Arrow-key navigation and post-dismiss focus restoration are now pluggable via a new optional UseTagGroupBaseOptions argument (arrowNavigationProps, onAfterTagDismiss), mirroring the useMenuTriggerBase_unstable pattern. The styled useTagGroup_unstable keeps full behaviour by supplying Tabster-backed implementations through that options bag.
• Adds package-entry exports for the Tag contexts so headless consumers can produce context values readable by the canonical base hooks: TagGroupContextProvider / useTagGroupContext_unstable, InteractionTagContextProvider / useInteractionTagContext_unstable, and the TagGroupContextValue / InteractionTagContextValue types. Also re-exports the previously-missing TagContextValues type.

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: entire library	1.293 MB 324.817 kB	1.293 MB 324.792 kB	-103 B -25 B
react-tag-picker @fluentui/react-tag-picker - package	173.435 kB 54.047 kB	173.332 kB 54.002 kB	-103 B -45 B
react-tags TagGroup	69.871 kB 21.442 kB	69.754 kB 21.41 kB	-117 B -32 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	66.328 kB 19.02 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	226.19 kB 67.909 kB
react-components react-components: FluentProvider & webLightTheme	39.525 kB 13.113 kB
react-headless-components-preview react-headless-components-preview: entire library	157.538 kB 44.675 kB
react-portal-compat PortalCompatProvider	5.567 kB 2.237 kB
react-tags InteractionTag	12.464 kB 4.95 kB
react-tags Tag	28.389 kB 8.911 kB
react-timepicker-compat TimePicker	104.049 kB 34.748 kB

_{🤖 This report was generated against 6cdfd5198fa185e7e229fd426805bcdbb35c3109}

[github-actions]

Pull request demo site: URL

[layershifter]

Let's avoid UseTagGroupBaseOptions & options param to keep our hooks consistent

[Hotell]

left some comments - needs changes/justification if there is no other way. ty

[layershifter]

@mainframev did you push the changes? I don't see any updates

[Hotell]

this PR introduces BREAKING CHANGE in v9, these changes need to be reverted