Korjaa alikategoria-ongelmat

- api.php: getOrInitCategories() päivittää automaattisesti subcategories-kentän
  olemassaolevaan categories.json-tiedostoon ilman manuaalista seedausta
- index.html: alikategoria-valitsin julkaisulomakkeeseen (näkyy kun kategorialla on alikategoriat)
- script.js: subcategory tallennetaan uuteen julkaisuun
- script.js: filterPosts null-turva + hakukenttä etsii myös alikategoria-id:llä
- script.js: updateSubcategoryPicker() päivittää alikategoriat kategorian vaihtuessa

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

api.php

@@ -315,7 +315,21 @@ function getOrInitCategories(): array {
         writeData('categories.json', $cats);
         return $cats;
     }
-    return readData('categories.json', []);
+    $cats = readData('categories.json', []);
+    // Merge in subcategories if existing file doesn't have them yet
+    $defaults = defaultCategories();
+    $defaultMap = [];
+    foreach ($defaults as $d) { $defaultMap[$d['id']] = $d; }
+    $changed = false;
+    foreach ($cats as &$cat) {
+        if (!isset($cat['subcategories']) && isset($defaultMap[$cat['id']]['subcategories'])) {
+            $cat['subcategories'] = $defaultMap[$cat['id']]['subcategories'];
+            $changed = true;
+        }
+    }
+    unset($cat);
+    if ($changed) writeData('categories.json', $cats);
+    return $cats;
 }
 
 // ─── Routing ───────────────────────────────────────────────────

index.html

@@ -109,7 +109,12 @@
 
       <div class="form-group">
         <label>Kategoria</label>
-        <select id="sub-category"></select>
+        <select id="sub-category" onchange="updateSubcategoryPicker()"></select>
+      </div>
+
+      <div class="form-group" id="sub-subcategory-group" style="display:none">
+        <label>Alikategoria</label>
+        <select id="sub-subcategory"></select>
       </div>
 
       <div class="form-group">

script.js

@@ -239,9 +239,10 @@ function filterPosts() {
   cards.forEach(card => {
     const matchesCat = currentFilter === 'all' || card.dataset.category === currentFilter;
     const matchesSub = currentSubFilter === 'all' || card.dataset.subcategory === currentSubFilter;
-    const title = card.querySelector('h3').textContent.toLowerCase();
-    const desc = card.querySelector('p:not(.card-author)').textContent.toLowerCase();
-    const matchesSearch = title.includes(query) || desc.includes(query);
+    const title  = (card.querySelector('h3')?.textContent || '').toLowerCase();
+    const desc   = (card.querySelector('p:not(.card-author)')?.textContent || '').toLowerCase();
+    const subLbl = (card.dataset.subcategory || '').toLowerCase();
+    const matchesSearch = !query || title.includes(query) || desc.includes(query) || subLbl.includes(query);
     const show = matchesCat && matchesSub && matchesSearch;
     card.style.display = show ? '' : 'none';
     if (show) visible++;
@@ -402,10 +403,27 @@ function setSubmitType(type) {
   document.getElementById('sub-typePostBtn').classList.toggle('active', type === 'post');
 }
 
+function updateSubcategoryPicker() {
+  const catId = document.getElementById('sub-category').value;
+  const cat = APP.categories.find(c => c.id === catId);
+  const subs = cat?.subcategories || [];
+  const group = document.getElementById('sub-subcategory-group');
+  const sel = document.getElementById('sub-subcategory');
+  if (!subs.length) {
+    group.style.display = 'none';
+    sel.innerHTML = '';
+  } else {
+    sel.innerHTML = `<option value="">— Valitse alikategoria —</option>` +
+      subs.map(s => `<option value="${s.id}">${s.fi}</option>`).join('');
+    group.style.display = '';
+  }
+}
+
 function openSubmitModal() {
   const cats = APP.categories;
   const sel = document.getElementById('sub-category');
   sel.innerHTML = cats.map(c => `<option value="${c.id}">${c.emoji || ''} ${c.fi}</option>`).join('');
+  updateSubcategoryPicker();
   setSubmitType('recipe');
   document.getElementById('submitOverlay').classList.add('open');
   document.body.style.overflow = 'hidden';
@@ -508,6 +526,7 @@ async function submitPublicPost() {
   }
 
   const category    = document.getElementById('sub-category').value;
+  const subcategory = document.getElementById('sub-subcategory')?.value || '';
   const cat         = APP.categories.find(c => c.id === category);
   const emoji       = cat?.emoji || '📝';
   const author      = document.getElementById('sub-author').value.trim() || 'Vieras';
@@ -520,7 +539,7 @@ async function submitPublicPost() {
 
   const post = {
     id: title.toLowerCase().normalize('NFD').replace(/[\u0300-\u036f]/g,'').replace(/\s+/g,'_').replace(/[^a-z0-9_]/g,'') + '_' + Date.now(),
-    title, emoji, category, author, desc, images,
+    title, emoji, category, subcategory, author, desc, images,
     type: submitType,
   };