fix(types): add hotUpdateCallback to auto-resolver handleHotUpdate

[posva]

Declare the optional hotUpdateCallback that the generated vue-router/auto-resolver module already accepts and calls with the new resolver.

Summary by CodeRabbit

• New Features
  • Hot-update handling now accepts an optional callback that receives the router’s updated resolver, allowing applications to respond when the resolver changes.
• TypeScript
  • Added type checks for the resolver callback, including validation of its accepted argument type.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: vuejs/router/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: e0e7944c-b519-465c-8d30-53d5f054fcc3

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📥 Commits

Reviewing files that changed from the base of the PR and between 8acc2bb and c690fba.

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📒 Files selected for processing (3)

• packages/router/test-dts/auto-resolver.test-d.ts
• packages/router/test-dts/tsconfig.experimental.json
• packages/router/vue-router-auto-resolver.d.mts

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📝 Walkthrough

Walkthrough

The auto-resolver declaration adds an optional hot-update callback that receives the new resolver. TypeScript tests check the exported resolver type and callback signature.

Changes

Auto-resolver types

Layer / File(s)	Summary
Hot-update callback declaration packages/router/vue-router-auto-resolver.d.mts	handleHotUpdate now accepts an optional callback that receives the new resolver. The declaration documentation describes callback timing and includes an example.
Resolver type checks packages/router/test-dts/tsconfig.experimental.json, packages/router/test-dts/auto-resolver.test-d.ts	The experimental TypeScript configuration maps and includes the auto-resolver type test. The test checks the exported resolver type and verifies accepted and rejected callback types.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

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Merge Risk: ⚪ Minimal · up to c690f

No actionable issue remains in the supplied review evidence; this change is mergeable after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding the optional hotUpdateCallback type to auto-resolver's handleHotUpdate.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

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[pkg-pr-new]

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pnpm add https://pkg.pr.new/vue-router@2836

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commit: c690fba

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.27%. Comparing base (8acc2bb) to head (c690fba).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2836   +/-   ##
=======================================
  Coverage   88.27%   88.27%           
=======================================
  Files          78       78           
  Lines        6305     6305           
  Branches     2047     2047           
=======================================
  Hits         5566     5566           
  Misses        650      650           
  Partials       89       89           

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