fix: restore articles to taxonomy pages and fix i18n headings

Fixed two critical bugs in taxonomy layouts:

1. Pinned/unpinned filter was silently hiding all articles. The filter
   only matched pages that explicitly set pinned=false, dropping all
   articles that omitted the parameter (most articles have nil, not false).
   Added the nil/empty fallback from _default/list.html.

2. Missing i18n keys caused blank headings on some taxonomy pages:
   - Added 'tag' key for /tags/term/ pages
   - Added 'categories' key for /categories/ list page

3. Harmonized spacing with main article list for visual consistency:
   Changed from space-y-2 max-w-2xl to space-y-6 max-w-3xl

Changes:
- i18n/en.yaml: Added 'tag' and 'categories' keys
- i18n/it.yaml: Added 'tag' and 'categories' keys
- taxonomy/list.html: Added nil fallback + spacing fix
- taxonomy/term.html: Added nil fallback + spacing fix

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

4 files changed, 22 insertions, 2 deletions

diff --git a/i18n/en.yaml b/i18n/en.yaml
index 2bcf579..2a90f2b 100644
--- a/i18n/en.yaml
+++ b/i18n/en.yaml
@@ -21,6 +21,8 @@ readingTime: "reading time"
 min: "min"
 author: "Author"
 category: "Category"
+categories: "Categories"
+tag: "Tag"
 tags: "Tags"
 relatedPosts: "Related articles"
 noRelated: "No related articles."
diff --git a/i18n/it.yaml b/i18n/it.yaml
index e22c0c5..9fd729e 100644
--- a/i18n/it.yaml
+++ b/i18n/it.yaml
@@ -21,6 +21,8 @@ readingTime: "tempo di lettura"
 min: "min"
 author: "Autore"
 category: "Categoria"
+categories: "Categorie"
+tag: "Tag"
 tags: "Tag"
 relatedPosts: "Articoli correlati"
 noRelated: "Nessun articolo correlato."
diff --git a/themes/danix-xyz-hacker/layouts/taxonomy/list.html b/themes/danix-xyz-hacker/layouts/taxonomy/list.html
index fd4b5d9..b923aba 100644
--- a/themes/danix-xyz-hacker/layouts/taxonomy/list.html
+++ b/themes/danix-xyz-hacker/layouts/taxonomy/list.html
@@ -6,10 +6,18 @@
   </h1>
 
   <!-- Articles list -->
-  <div class="space-y-2 max-w-2xl">
+  <div class="space-y-6 max-w-3xl">
     {{ $pinned := where .Pages "Params.pinned" true }}
     {{ $unpinned := where .Pages "Params.pinned" false }}
 
+    <!-- If no unpinned posts found (because param is undefined), get all non-pinned pages -->
+    {{ if eq (len $unpinned) 0 }}
+      {{ $unpinned = where .Pages "Params.pinned" nil }}
+      {{ if eq (len $unpinned) 0 }}
+        {{ $unpinned = where .Pages "Params.pinned" "" }}
+      {{ end }}
+    {{ end }}
+
     <!-- Pinned posts first -->
     {{ range (sort $pinned "Date" "desc") }}
       {{ partial "article-list-item.html" . }}
diff --git a/themes/danix-xyz-hacker/layouts/taxonomy/term.html b/themes/danix-xyz-hacker/layouts/taxonomy/term.html
index 5353715..5858f64 100644
--- a/themes/danix-xyz-hacker/layouts/taxonomy/term.html
+++ b/themes/danix-xyz-hacker/layouts/taxonomy/term.html
@@ -13,10 +13,18 @@
   </p>
 
   <!-- Articles list -->
-  <div class="space-y-2 max-w-2xl">
+  <div class="space-y-6 max-w-3xl">
     {{ $pinned := where .Pages "Params.pinned" true }}
     {{ $unpinned := where .Pages "Params.pinned" false }}
 
+    <!-- If no unpinned posts found (because param is undefined), get all non-pinned pages -->
+    {{ if eq (len $unpinned) 0 }}
+      {{ $unpinned = where .Pages "Params.pinned" nil }}
+      {{ if eq (len $unpinned) 0 }}
+        {{ $unpinned = where .Pages "Params.pinned" "" }}
+      {{ end }}
+    {{ end }}
+
     <!-- Pinned posts first -->
     {{ range (sort $pinned "Date" "desc") }}
       {{ partial "article-list-item.html" . }}