fix(react): exclude lazy component type from stable

[orionmiz]

Summary by CodeRabbit

릴리스 노트

• Refactor
  • Activity 컴포넌트 타입 시스템을 정리했습니다.
  • 컴포넌트 타입 선언을 더욱 명시적으로 개선했습니다.
  • 내부 구조를 정렬하여 코드 유지보수성을 향상시켰습니다.

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[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Refactor
  • Consolidated activity component type exports to a stable location and clarified public API.
  • Strengthened type constraints for activity component types to improve type safety and inference.
  • No runtime behavior changes; existing usage should remain compatible aside from stricter type checking.

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Walkthrough

Adjusts TypeScript type exports and import paths: adds a stable ActivityComponentType alias, tightens generic constraints across several internal activity component type declarations, updates stable/future index exports, and changes one loader import to the new local type path; no runtime changes.

Changes

Cohort / File(s)	Summary
Stable type alias integrations/react/src/stable/ActivityComponentType.tsx	Adds exported type alias ActivityComponentType<T extends { [K in keyof T]: any } = {}> = StaticActivityComponentType<T> (type-only addition).
Stable index export integrations/react/src/stable/index.ts	Replaces prior alias export with export * from "./ActivityComponentType" to publish the new stable type.
Future index re-export integrations/react/src/future/index.ts	Adds export * from "../__internal__/MonolithicActivityComponentType" to future exports (type re-export).
Loader import path integrations/react/src/future/loader/loaderPlugin.tsx	Updates import of ActivityComponentType from ../../__internal__/ActivityComponentType to ../ActivityComponentType (import source only).
Internal generic constraint updates integrations/react/src/__internal__/ActivityComponentType.ts, integrations/react/src/__internal__/LazyActivityComponentType.ts, integrations/react/src/__internal__/MonolithicActivityComponentType.ts, integrations/react/src/__internal__/StaticActivityComponentType.ts	Tightens generic parameter constraint from T extends {} to T extends { [K in keyof T]: any } across internal type aliases (type signatures changed; no runtime logic changes).

Sequence Diagram(s)

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	❓ Inconclusive	No description was provided by the author, making it impossible to assess alignment with the changeset.	Add a pull request description explaining the rationale for tightening generic constraints and reorganizing type exports across modules.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: refactoring to exclude lazy component types from the stable API surface and reorganize type exports.

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✨ Finishing touches

• 📝 Generate docstrings

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