fix(core): apply named function pattern to useEffect calls

[eunwoo-levi]

Overview

Apply the named function pattern to useEffect callbacks across multiple hooks to comply with the project's coding standards.

Summary

CLAUDE.md explicitly requires named functions in useEffect:

Named functions in useEffect — Improves stack traces and readability

useEffect(function handleResize() { ... }, []);  // ✅
useEffect(() => { ... }, []);                     // ❌

Changes

• usePreservedCallback — function syncCallbackRef()
• useInterval — function runImmediateCallback(), function startInterval()
• useDebounce — function cancelDebouncedOnUnmount()
• useDebouncedCallback — function clearDebouncedOnUnmount()
• useLoading — function trackMountedState()

Checklist

• Did you write the test code?
• Have you run yarn run fix to format and lint the code and docs?
• Have you run yarn run test:coverage to make sure there is no uncovered line?
• Did you write the JSDoc?

[zztnrudzz13]

This is a great PR — we’re planning to merge it soon. Could you please add a changeset?

[eunwoo-levi]

@zztnrudzz13 Added a changeset! Thank you for the review :)

[zztnrudzz13]

Great! Thank you for contributing!

[Copilot]

Pull request overview

This PR updates several core hooks to use named function expressions for useEffect callbacks, aligning with the project standard documented in CLAUDE.md and improving stack traces/readability.

Changes:

• Replaced anonymous arrow callbacks in useEffect with named functions across multiple hooks.
• Preserved existing effect logic while improving debuggability.
• Added a patch changeset documenting the behavioral-neutral internal refactor.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/hooks/usePreservedCallback/usePreservedCallback.ts	Replaces useEffect arrow callback with a named function to improve stack traces.
packages/core/src/hooks/useLoading/useLoading.ts	Uses a named function for the mounted-state tracking effect.
packages/core/src/hooks/useInterval/useInterval.ts	Names the immediate-run and interval-start effects for clearer stack traces.
packages/core/src/hooks/useDebouncedCallback/useDebouncedCallback.ts	Converts the unmount cleanup effect to a named function.
packages/core/src/hooks/useDebounce/useDebounce.ts	Converts the unmount cancel effect to a named function.
.changeset/pretty-candles-wink.md	Adds a patch changeset entry describing the refactor.

[eunwoo-levi]

@kimyouknow Rebased onto latest main after PR #345 was merged:) Thanks for the review!