fix(FileUploadField): don't render empty dom node

[logonoff]

What: Closes #12235

Summary by CodeRabbit

• Bug Fixes
  • Improved file upload field rendering logic to better handle loading states and text preview display together, ensuring the details section appears appropriately based on active states.

[coderabbitai]

Walkthrough

Restructured conditional rendering in FileUploadField component to wrap file details area in a single container that activates when a loading state is active or preview is enabled. The loading spinner and TextArea preview are now rendered together inside this conditional block, consolidating the render flow.

Changes

Cohort / File(s)	Summary
FileUpload component layout restructuring packages/react-core/src/components/FileUpload/FileUploadField.tsx	Consolidated conditional rendering logic by wrapping file details in a single container that renders when loading state is active or preview is enabled. Loading spinner moved into the same conditional block alongside the TextArea preview, changing from always rendering the details section to conditionally rendering it.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Suggested reviewers

• dlabaj
• thatblindgeye
• kmcfaul

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: preventing empty DOM node rendering in FileUploadField, which directly addresses the extra bottom space issue.
Linked Issues check	✅ Passed	The code changes align with issue #12235 by conditionally rendering the file details container only when needed, eliminating the empty DOM node that caused the extra bottom space.
Out of Scope Changes check	✅ Passed	All changes in FileUploadField.tsx are directly scoped to fixing the empty DOM node rendering issue mentioned in issue #12235, with no extraneous modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[patternfly-build]

Preview: https://pf-react-pr-12236.surge.sh

A11y report: https://pf-react-pr-12236-a11y.surge.sh

[wise-king-sullyman]

Change looks great, thanks!

[patternfly-build]

Your changes have been released in:

• @patternfly/react-code-editor@6.5.0-prerelease.33
• @patternfly/react-core@6.5.0-prerelease.30
• @patternfly/react-docs@7.5.0-prerelease.35
• @patternfly/react-drag-drop@6.5.0-prerelease.30
• demo-app-ts@6.5.0-prerelease.59
• @patternfly/react-table@6.5.0-prerelease.31
• @patternfly/react-templates@6.5.0-prerelease.30

Thanks for your contribution! 🎉