[MAIN] STERICMS-896 Enhance facet list functionality with no-results message…

[Mao8a]

… and topic filtering

Summary

STERICMS-896 — Resource Center topic pages show the entire library instead of filtering by topic
https://herodigital.atlassian.net/browse/STERICMS-896

Root cause

blocks/facet-list/facet-list.js never constrained results by the current page's topic — only by the configured sheet and manually-checked facets, so topic pages behaved identically to the main resource-center listing.

Fix

Added getPageTopic()/normalizeTopicValue() to blocks/facet-list/facet-list.js, wired as a base filter in getResults(), updateResults(), and getFacets(). Topic identity defaults to the URL slug and is also authorable via a topic block-config row. Added an empty-state message for topics with no matches.

function getPageTopic() {
  if (PAGE_TOPIC_OVERRIDE) {
    return PAGE_TOPIC_OVERRIDE;
  }
  if (PAGE_LOCALE === 'fr-ca') {
    return null;
  }
  const { pathname } = window.location;
  const match = pathname.match(/\/topics\/([^/]+)/);
  return match ? match[1] : null;
}

Test URLs

Before

• https://main--shred-it--stericycle.aem.page/en-us/resource-center/topics/data-security

After

• https://feature-stericms-896-topic-filter--shred-it--stericycle.aem.page/en-us/resource-center/topics/data-security

Reference (unaffected page)

• https://main--shred-it--stericycle.aem.page/en-us/resource-center

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Commits

• e37a39f ✅ (latest)
• 88f8531 ✅

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/en-us/resource-center/topics/data-security
🖥️	/en-us/resource-center/topics/data-security