fix(validators): handle additional properties object when no other properties are defined

[mrlubos]

Closes #2196

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🦋 Changeset detected

Latest commit: 2ffb612

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hey-api/openapi-ts	Patch

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Name	Status	Preview	Comments	Updated (UTC)
hey-api-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 20, 2025 11:55am

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commit: 2ffb612

[codecov]

Codecov Report

Attention: Patch coverage is 1.08696% with 91 lines in your changes missing coverage. Please review.

Project coverage is 25.03%. Comparing base (69665af) to head (2ffb612).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/openapi-ts/src/plugins/valibot/plugin.ts	0.00%	69 Missing ⚠️
packages/openapi-ts/src/plugins/zod/plugin.ts	4.34%	22 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2213      +/-   ##
==========================================
- Coverage   25.04%   25.03%   -0.01%     
==========================================
  Files         296      296              
  Lines       27770    27784      +14     
  Branches     1266     1266              
==========================================
+ Hits         6956     6957       +1     
- Misses      20805    20818      +13     
  Partials        9        9              

Flag	Coverage Δ
unittests	25.03% <1.08%> (-0.01%)	⬇️

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