DF-1099: Notification banner component#405

Draft

alexluckett wants to merge 13 commits into

mainfrom

feature/notification-banner-component

Commits on May 18, 2026

feat: add NotificationBanner content component
alexluckett
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feat: add NotificationBanner Nunjucks template
alexluckett
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chore: add NotificationBanner demo page to simple-form
alexluckett
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feat: render notification banner content via markdown parser
alexluckett
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fix: use Nunjucks markdown filter for banner content rendering
alexluckett
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test: use markdown content in NotificationBanner test fixture
alexluckett
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feat: add heading option and fix template whitespace on notification banner
alexluckett
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fix: wrap banner markdown content in app-prose-scope for correct paragraph styling
alexluckett
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fix: remove trailing margin from last child in app-prose-scope
alexluckett
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chore: update demo link to defra.gov.uk
alexluckett
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refactor: inline test setup into individual NotificationBanner tests
alexluckett
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feat: support markdown in notification banner heading via app-prose-scope
alexluckett
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refactor: flatten NotificationBanner tests, remove single-test describe blocks
alexluckett
committed