[Health] Add AppColourMode wrapper to multi-preview annotations

[adi-gnm]

Description

Adds an AppColourMode preview wrapper to the existing @PreviewPhoneBothMode and @PreviewTabletBothMode annotations. Also adds a new @PreviewAllDeviceBothMode annotation since we now can't apply both phone and tablet annotations to the same preview.

This change means that we now don't need to wrap our previews with AppColourMode. The multi preview annotations will automatically do it.

This change also means that the screenshot tests will need to wrap their content with AppColourMode since the preview under test no longer does that.

Related changes:

1. Updated Compose BOM to 2026.08.00 that allows preview wrappers on multi preview annotations
2. Upgraded Gradle wrapper, AGP, compileSdk and Kotlinter to match minimum Compose requirements

Checklist

• Changes have been checked by the developer
• Changes have been checked by the reviewers
• Unit tested

[Copilot]

Pull request overview

Adds an AppColourMode wrapper at the multi-preview annotation level (via Compose @PreviewWrapper) so that previews using AppColour.current render correctly in day/night previews without each preview function manually wrapping itself. This is applied across Source components, Paparazzi tests, and sample previews, alongside a Compose BOM bump.

Changes:

• Introduces AppColourWrapper : PreviewWrapperProvider and applies it to multi-preview annotations (PreviewPhoneBothMode, PreviewTabletBothMode, PreviewAllDeviceBothMode).
• Removes per-preview AppColourMode { ... } wrappers from many preview composables and updates Paparazzi tests to wrap snapshots explicitly.
• Updates Compose BOM version and detekt baselines for newly surfaced rules.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
android/source/src/test/kotlin/com/gu/source/components/promosticker/PromoStickerTest.kt	Wraps Paparazzi snapshots in AppColourMode.
android/source/src/test/kotlin/com/gu/source/components/pager/PagerProgressBarTest.kt	Wraps Paparazzi snapshot in AppColourMode.
android/source/src/test/kotlin/com/gu/source/components/buttons/SourceIconButtonTest.kt	Wraps Paparazzi snapshots in AppColourMode.
android/source/src/test/kotlin/com/gu/source/components/buttons/SourceButtonTest.kt	Wraps Paparazzi snapshots in AppColourMode.
android/source/src/test/kotlin/com/gu/source/components/buttons/PlainSourceButtonTest.kt	Wraps Paparazzi snapshot in AppColourMode.
android/source/src/test/kotlin/com/gu/source/components/banner/SourceAlertBannerTest.kt	Wraps Paparazzi snapshot in AppColourMode.
android/source/src/main/kotlin/com/gu/source/utils/PreviewAnnotations.kt	Adds @PreviewWrapper(AppColourWrapper::class) to multi-preview annotations; expands/clarifies preview sets.
android/source/src/main/kotlin/com/gu/source/utils/AppColourWrapper.kt	New wrapper provider that applies AppColourMode to previews.
android/source/src/main/kotlin/com/gu/source/components/rating/SourceRating.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/promosticker/PromoSticker.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/pager/PagerProgressButtons.kt	Switches to @PreviewAllDeviceBothMode; removes preview-local AppColourMode wrapper.
android/source/src/main/kotlin/com/gu/source/components/pager/PagerProgressBar.kt	Switches to @PreviewAllDeviceBothMode; removes preview-local AppColourMode wrapper in one preview but not all.
android/source/src/main/kotlin/com/gu/source/components/chips/SourceChip.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/chips/SourceBaseChip.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/buttons/SourceTextButton.kt	Switches preview annotation to @PreviewAllDeviceBothMode; retains preview-local AppColourMode.
android/source/src/main/kotlin/com/gu/source/components/buttons/SourceIconButton.kt	Removes preview-local AppColourMode wrappers in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/buttons/SourceButton.kt	Removes preview-local AppColourMode wrappers in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/buttons/PlainSourceButton.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/src/main/kotlin/com/gu/source/components/banner/SourceAlertBanner.kt	Removes preview-local AppColourMode wrapper in favor of annotation wrapper.
android/source/detekt-baseline.xml	Adds new baseline entries surfaced by the preview changes.
android/sample/src/main/kotlin/com/gu/source/previews/TextButtonPreview.kt	Switches to @PreviewAllDeviceBothMode and removes explicit AppColourMode wrapper.
android/sample/src/main/kotlin/com/gu/source/previews/ImagePagerWithProgressIndicator.kt	Switches to @PreviewAllDeviceBothMode and removes explicit AppColourMode wrapper.
android/sample/src/main/kotlin/com/gu/source/Home.kt	Removes explicit AppColourMode wrapper from HomePreview.
android/sample/detekt-baseline.xml	Adds new baseline entries for preview functions.
android/gradle/libs.versions.toml	Updates Compose BOM version.

Suppressed comments (1)

android/source/src/main/kotlin/com/gu/source/components/pager/PagerProgressBar.kt:221

• AnimatedPreview still wraps its content in AppColourMode, but @PreviewAllDeviceBothMode already applies @PreviewWrapper(AppColourWrapper::class) (which wraps in AppColourMode). This double-wrap causes redundant isSystemInDarkTheme() evaluation for previews.

Suggested resolution: remove the inner AppColourMode { ... } from this preview and also delete the (then-unused) AppColourMode import.

@PreviewAllDeviceBothMode
@Composable
private fun AnimatedPreview() {
    AppColourMode {
        val pagerState = rememberPagerState(0) { 10 }

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[gu-gradle-library-release]

@adi-gnm has published a preview version of this PR with release workflow run #259, based on commit ee69ad5:

10.1.0-PREVIEW.abhealthmulti-preview-app-colour-wrapper.2026-08-13T1610.ee69ad5e

Want to make another preview release?

Click 'Run workflow' in the GitHub UI, specifying the ab/health/multi-preview-app-colour-wrapper branch, or use the GitHub CLI command:

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