feat: update interests templates for category-based data model

Interests are now grouped by category (matching skills pattern).
Updated cv-interests.njk to iterate categories, cv.js fallback to {},
and cv.njk hasCvData check to include interests.

_data/cv.js

@@ -30,7 +30,7 @@ export default function () {
       skillTypes: {},
       languages: [],
       education: [],
-      interests: [],
+      interests: {},
       interestTypes: {},
     };
   }

_includes/components/sections/cv-interests.njk

@@ -1,21 +1,29 @@
 {#
-  CV Interests Section - interest tags
+  CV Interests Section - interests grouped by category
   Data fetched from /cv/data.json via homepage plugin
 #}
 
-{% if cv and cv.interests and cv.interests.length %}
+{% if cv and cv.interests and (cv.interests | dictsort | length) %}
 <section class="mb-8 sm:mb-12" id="interests">
   <h2 class="text-xl sm:text-2xl font-bold text-surface-900 dark:text-surface-100 mb-4 sm:mb-6">
     {{ section.config.title or "Interests" }}
   </h2>
 
-  {% set hasTypeData = cv.interestTypes and (cv.interestTypes | dictsort | length > 0) %}
-  <div class="flex flex-wrap gap-2">
-    {% for interest in cv.interests %}
-    {% if not filterType or (hasTypeData and cv.interestTypes[interest] == filterType) or not hasTypeData %}
-    <span class="px-3 py-1.5 bg-white dark:bg-surface-800 border border-surface-200 dark:border-surface-700 rounded-full text-sm text-surface-700 dark:text-surface-300 hover:border-primary-400 dark:hover:border-primary-600 transition-colors">
+  <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
+    {% for category, items in cv.interests | dictsort %}
+    {% if not filterType or (cv.interestTypes and cv.interestTypes[category] == filterType) or not cv.interestTypes or not cv.interestTypes[category] %}
+    <div class="p-4 bg-white dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700">
+      <h3 class="font-semibold text-sm uppercase tracking-wide text-surface-600 dark:text-surface-400 mb-2">
+        {{ category }}
+      </h3>
+      <div class="flex flex-wrap gap-1.5">
+        {% for interest in items %}
+        <span class="text-xs px-2 py-1 bg-primary-50 dark:bg-primary-900/30 text-primary-700 dark:text-primary-300 rounded-full">
           {{ interest }}
         </span>
+        {% endfor %}
+      </div>
+    </div>
     {% endif %}
     {% endfor %}
   </div>

cv.njk

@@ -10,7 +10,8 @@ pagefindIgnore: true
 
 {% set hasCvData = (cv.experience and cv.experience.length) or
       (cv.projects and cv.projects.length) or
-      (cv.skills and ((cv.skills or {}) | dictsort | length)) %}
+      (cv.skills and ((cv.skills or {}) | dictsort | length)) or
+      (cv.interests and ((cv.interests or {}) | dictsort | length)) %}
 
 {% if hasCvData %}