Add pagination with 'Näytä lisää' button (24 posts per page)

Shows 24 posts initially, loads 24 more each click. Resets on filter/search change.

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

index.html

@@ -30,7 +30,7 @@
   <section class="controls" id="posts">
     <div class="container">
       <div class="search-row">
-        <input type="text" id="search" data-i18n-ph="search_ph" oninput="filterPosts()" />
+        <input type="text" id="search" data-i18n-ph="search_ph" oninput="visibleCount=POSTS_PER_PAGE;filterPosts()" />
         <button class="likes-filter-btn" id="likesFilterBtn" onclick="toggleLikesFilter()">❤️ Tykkäämäni</button>
       </div>
       <div class="filters" id="categoryFilters"></div>
@@ -44,6 +44,9 @@
     <div class="container">
       <div class="recipe-grid" id="postGrid"></div>
       <p class="no-results" id="noResults" style="display:none;" data-i18n="no_results"></p>
+      <div id="loadMoreWrap" style="text-align:center;margin:24px 0;display:none">
+        <button id="loadMoreBtn" onclick="loadMore()" style="padding:10px 32px;font-size:1rem;border:2px solid #c4956a;background:#fff;color:#8b5e3c;border-radius:24px;cursor:pointer;font-weight:600">Näytä lisää</button>
+      </div>
     </div>
   </section>