# 2026-04-04 Accordion HTML Escape Fix and Filter Label Style

> **Session date:** 2026-04-04
> **Agents used:** Forge, Pixel
> **ClickUp tickets:** none
> **Branch:** [current branch]

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## Summary

Two unrelated bugs were fixed in the Naomi 2025 theme. First, a double-escape regression in the accordion paragraph preprocess hook was causing `<summary>` labels to render raw HTML as literal text instead of styled markup. Second, the custom "by author" label on the Stories listing exposed filter was visually mismatched compared to BEF fieldset legends, which was corrected with a SCSS rule.

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## Work Completed

### Forge — Accordion summary double-escape regression

**What was done:**
The `naomi_2025_preprocess_field__advanced_header_field()` hook in `preprocess-field.php` was applying `Html::escape()` to field items whose `#value` was already a safe `Markup` object. This caused the accordion `<summary>` element to render literal `<SPAN>AWARDS</SPAN>` text rather than styled HTML. The fix adds an early-return guard to skip the preprocess hook entirely when the active field formatter is `s360_layout_builder_accordion_summary`, since that formatter (`S360LayoutBuilderAccordionSummaryFormatter`) constructs its own safe `Markup` value and does not require span-wrapping or escaping.

The `Html::escape()` call is deliberately retained for all other formatters, as it provides XSS protection for plain-text title values that do not arrive as `Markup` objects.

**Files changed:**
- `web/themes/custom/naomi_2025/theme-hooks/preprocess-field.php` — Added early-return guard to skip the hook when formatter is `s360_layout_builder_accordion_summary`

**Decisions made:**
- The guard targets the formatter ID rather than inspecting the value type, because checking `instanceof Markup` would silently suppress escaping for any future formatter that happens to return `Markup`. Targeting by formatter ID is explicit and reviewable.
- `Html::escape()` was intentionally retained for all other code paths to preserve the XSS protection that was the original intent of the function.

**Root cause:**
The regression was introduced in commit `85cd9c51` (titled "ci: update to latest v2 copilot instructions"), which inadvertently re-added `Html::escape()` after it had been deliberately removed in commit `4dc352f9`. The commit title gave no indication that application logic was being changed, making it easy to overlook in review.

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### Pixel — "By author" filter label style

**What was done:**
The author-select `<label>` on the Stories listing page (`/tangent`) was inheriting `%text-style-label` (larger text, `font-size: ms(1)`) via a `label:has(+ div)` rule in the base `_form.scss` partial. BEF checkboxes group labels use `<legend>` elements which receive `%text-style-small-copy` (`font-size: ms(-1)`), creating a visible size mismatch. A targeted rule was added to `.form--views-exposed-form` to align the custom label with the BEF legend style.

**Files changed:**
- `web/themes/custom/naomi_2025/ui/src/templates/form/views-exposed-form/component/views-exposed-form.scss` — Added `.form__label--by-author` rule using `@extend %text-style-small-copy`, `display: block`, and `margin-bottom: 1em`; added `@use "@naomi-2025/ui-core/text-styles"` import

**Decisions made:**
- The fix is scoped to `.form--views-exposed-form .form__label--by-author` rather than broadly changing the `label:has(+ div)` rule in `_form.scss`, to avoid unintended side-effects on other forms.
- Assets were compiled with webpack after the SCSS change.

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## Testing

- [ ] Accordion paragraph `<summary>` labels render correctly as styled HTML (no raw tag text visible)
- [ ] All other usages of `naomi_2025_preprocess_field__advanced_header_field()` continue to render correctly
- [ ] "By author" label on `/tangent` Stories listing matches BEF fieldset legend size
- [ ] No visual regressions on other form labels site-wide
- [ ] PHPCS passed
- [ ] Webpack build succeeded with no errors

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## Notes for Future Developers

- **`preprocess-field.php` is formatter-aware.** The `naomi_2025_preprocess_field__advanced_header_field()` hook contains a guard list of formatter IDs that must be skipped. If a new formatter is added to `advanced_header_field` that produces its own safe `Markup`, it should be added to this exclusion check.
- **Watch for "ci:" or "chore:" commits that touch PHP files.** The `85cd9c51` regression occurred because a commit labelled as a CI/tooling update silently reverted an application-level fix. If commits with non-functional labels touch theme hooks, they should be reviewed carefully.
- **`s360_layout_builder_accordion_summary` formatter is self-contained.** `S360LayoutBuilderAccordionSummaryFormatter` builds and escapes its own output. It does not require any additional escaping in preprocess.
