fix(form-core): validate fields without components when setFieldValue…

[techcodie]

… is called

• Fix validateField to run form-level validation for fields without field instances
• Add test cases to verify validation works for fields without components
• Resolves issue where setFieldValue didn't trigger validation for fields without <form.Field> components

Fixes: Form validation not working for fields without associated components

🎯 Changes

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

[changeset-bot]

⚠️ No Changeset found

Latest commit: 96f6d69

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 96f6d69

Command	Status	Duration	Result
nx affected --targets=test:sherif,test:knip,tes...	✅ Succeeded	1m 21s	View ↗
nx run-many --target=build --exclude=examples/**	✅ Succeeded	32s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-11-25 08:12:58 UTC

[pkg-pr-new]

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commit: 96f6d69

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.24%. Comparing base (6892ed0) to head (96f6d69).
⚠️ Report is 62 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1873      +/-   ##
==========================================
- Coverage   90.35%   90.24%   -0.12%     
==========================================
  Files          38       41       +3     
  Lines        1752     1855     +103     
  Branches      444      469      +25     
==========================================
+ Hits         1583     1674      +91     
- Misses        149      162      +13     
+ Partials       20       19       -1     

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