feat: Add reusable tag cloud partial with A11y and dark/light mode support

- Create tag-cloud.html partial with flexible dict interface:
  * showCount (bool): Toggle count badges
  * wrapInWidget (bool): Sidebar widget wrapper with .sidebar-widget class
  * maxTags (int): Limit shown tags (used for sidebar: 15 max)
  * headingLevel (h2|h3): Configurable heading element

- Implement visual tier scaling by frequency (3 tiers):
  * low: 0.75rem, 0.75 opacity — uncommon tags
  * medium: 0.875rem, 0.88 opacity — moderate frequency
  * high: 1rem, 1 opacity, accent border — popular tags

- Add .tag-cloud and .tag-tier-* CSS classes (main.css):
  * Uses CSS variables (--accent, --border, --text-dim) for dark/light compatibility
  * Focus ring matches site standard (outline-offset: 2px)
  * Hover state: accent border + subtle bg tint
  * prefers-reduced-motion: transitions disabled

- Integrate in 3 locations:
  * Homepage (layouts/index.html): Full cloud with counts
  * Article sidebar (layouts/partials/sidebar.html): Compact widget, 15 max, no counts
  * 404 pages (404.en.html, 404.it.html): Full cloud between recent articles and nav

- A11y implementation:
  * <section aria-labelledby> landmark (non-sidebar mode)
  * <nav aria-label="Browse by topic"> named navigation
  * Each link aria-label includes count text even when visual badge hidden
  * <span aria-hidden="true"> on count badge to avoid duplication
  * Proper heading hierarchy (h2 homepage, h3 on 404)

- Add i18n keys (en.yaml, it.yaml):
  * tagCloud: "Explore Topics" / "Esplora gli argomenti"
  * exploreTopics: "Browse by topic" / "Sfoglia per argomento"

- URL handling: Use .Page.RelPermalink from OrderedTaxonomyEntry — no manual /tags/ construction, language-aware paths work automatically

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/themes/danix-xyz-hacker/assets/css/main.min.css b/themes/danix-xyz-hacker/assets/css/main.min.css
index 8604392..236b11c 100644
--- a/themes/danix-xyz-hacker/assets/css/main.min.css
+++ b/themes/danix-xyz-hacker/assets/css/main.min.css
@@ -1448,6 +1448,65 @@ button,
   margin-bottom: 1.5rem;
 }
 
+/* =====================
+     Tag Cloud Component
+     ===================== */
+
+.tag-cloud {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  align-items: baseline;
+}
+
+.tag-cloud-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.375rem;
+  padding: 0.25rem 0.625rem;
+  border: 1px solid var(--border);
+  border-radius: 0.25rem;
+  font-family: var(--font-mono, 'JetBrains Mono', monospace);
+  font-size: 0.75rem;
+  color: var(--text-dim);
+  text-decoration: none;
+  transition: border-color 150ms ease-out, color 150ms ease-out, background-color 150ms ease-out;
+  white-space: nowrap;
+  line-height: 1.4;
+}
+
+.tag-cloud-link:hover {
+  border-color: rgba(var(--accent-rgb), 0.5);
+  color: var(--accent);
+  background-color: rgba(var(--accent-rgb), 0.06);
+}
+
+.tag-cloud-link:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: 2px;
+  border-radius: 0.25rem;
+}
+
+.tag-cloud-count {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0 0.375rem;
+  border-radius: 9999px;
+  font-size: 0.65em;
+  font-weight: 600;
+  background-color: rgba(var(--accent-rgb), 0.12);
+  color: var(--accent);
+  line-height: 1.6;
+  min-width: 1.2em;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .tag-cloud-link {
+    transition: none;
+  }
+}
+
 .share-grid {
   display: grid;
   grid-template-columns: repeat(3, 50px);