Sort subcategories alphabetically with Muut always last

Applied sortSubcategories() to submission form picker, admin category
list, and admin subcategory checkboxes. Added the helper function to
admin.html since it's a standalone file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

script.js

@@ -81,6 +81,18 @@ function applyTranslations() {
   document.querySelectorAll('[data-i18n-ph]').forEach(el => { el.placeholder = t(el.dataset.i18nPh); });
 }
 
+// ===========================
+// HELPERS
+// ===========================
+function sortSubcategories(subs) {
+  return [...subs].sort((a, b) => {
+    const aM = a.fi.toLowerCase() === 'muut' ? 1 : 0;
+    const bM = b.fi.toLowerCase() === 'muut' ? 1 : 0;
+    if (aM !== bM) return aM - bM;
+    return a.fi.localeCompare(b.fi, 'fi');
+  });
+}
+
 // ===========================
 // API
 // ===========================
@@ -256,7 +268,7 @@ function renderSubFilters() {
   if (!container) return;
   if (currentFilter === 'all') { container.innerHTML = ''; return; }
   const cat = APP.categories.find(c => c.id === currentFilter);
-  const subs = (cat?.subcategories || []).filter(s => countPostsInSubcategory(currentFilter, s.id) > 0);
+  const subs = sortSubcategories((cat?.subcategories || []).filter(s => countPostsInSubcategory(currentFilter, s.id) > 0));
   if (!subs.length) { container.innerHTML = ''; return; }
   container.innerHTML =
     `<button class="sub-filter-btn ${currentSubFilter === 'all' ? 'active' : ''}" onclick="setSubFilter('all',this)">Kaikki</button>` +
@@ -453,7 +465,7 @@ function setSubmitType(type) {
 function updateSubcategoryPicker() {
   const catId = document.getElementById('sub-category').value;
   const cat = APP.categories.find(c => c.id === catId);
-  const subs = cat?.subcategories || [];
+  const subs = sortSubcategories(cat?.subcategories || []);
   const group = document.getElementById('sub-subcategory-group');
   const sel = document.getElementById('sub-subcategory');
   if (!subs.length) {