fix(value-editor): restore the border on JSON values

[talissoncosta]

Thanks for submitting a PR! Please check the boxes below:

• I have read the Contributing Guide.
• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Changes

Removes a stale, bare .json { border: none } rule in _hljs.scss that overrides the .hljs border on the value editor's <code class="json">, so JSON values render without the box shown for .txt / .xml / .toml / .yaml.

The selector is unscoped (it also matches the .json language tab) and same-specificity as .hljs, so being declared later it wins and strips the border. Removing it lets JSON use the same .hljs border as the other languages. .json is the only affected language; there are no other bare language-class selectors.

How did you test this code?

Manually:

1. Open a feature value editor (or an identity override) and enter a value.
2. Switch the language between .txt, .xml, .toml, .yaml, .json.
3. Before: .json shows no bordered box; the others do.
4. After: .json renders the same bordered box as the other languages.

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Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview	Aug 13, 2026 1:55pm
flagsmith-frontend-staging	Ready	Preview	Aug 13, 2026 1:55pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Aug 13, 2026 1:55pm

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 8f41166e-6c24-4ed6-ae17-8bc3a8249ac8

📥 Commits

Reviewing files that changed from the base of the PR and between dc99d65 and ab56362.

📒 Files selected for processing (1)

• frontend/web/styles/3rdParty/_hljs.scss

💤 Files with no reviewable changes (1)

• frontend/web/styles/3rdParty/_hljs.scss

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📝 Walkthrough

Walkthrough

The change removes the .json style rule that set border: none in the syntax highlighting stylesheet. All other styles remain unchanged.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Mergeability Score: ⚪ Minimal · up to ab563

This localized stylesheet change restores the JSON value editor border to match the other supported formats, with no actionable merge-blocking risk remaining after normal checks and review.

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