[Web] Fix delayTimeout type FlingGestureHandler

[m-bert]

Description

Leftover from #4381: the web handlers' timeout fields were changed to ReturnType<typeof setTimeout>. FlingGestureHandler was the one that PR missed.

Test plan

yarn ts-check passes

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

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Run ID: a523a222-1b5f-4e94-84fd-a1ce15bdc71d

📥 Commits

Reviewing files that changed from the base of the PR and between f22d3bd and bffced9.

📒 Files selected for processing (1)

• packages/react-native-gesture-handler/src/web/handlers/FlingGestureHandler.ts

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Improved timer compatibility across supported environments by correcting timeout handling for fling gestures.

Walkthrough

The web fling gesture handler updates its private delayTimeout declaration to allow undefined while retaining the environment-specific ReturnType<typeof setTimeout> type.

Changes

Fling timeout typing

Layer / File(s)	Summary
Update timeout handle type packages/react-native-gesture-handler/src/web/handlers/FlingGestureHandler.ts	The private delayTimeout property now allows undefined and uses ReturnType<typeof setTimeout>.

Merge Risk: ⚪ Minimal · up to bffce

This localized type-only fix is merge-ready after normal checks and review; no actionable merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the web FlingGestureHandler change and the delayTimeout type fix.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[Copilot]

Pull request overview

Fixes a TypeScript typing inconsistency in the web implementation of FlingGestureHandler by updating its timeout field type to match the ReturnType<typeof setTimeout> approach introduced in #4381, improving compatibility for consumers whose TS programs include @types/node.

Changes:

• Update FlingGestureHandler’s delayTimeout field type from number to ReturnType<typeof setTimeout>.

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