feat(migration): complete WordPress migration and UX refinements

- Migrate historical posts, localized assets, and 103 comments
- Colocate media into posts/<slug>/images/ and remove wp-content
- Add native bilingual support for ai-can-change post (English default, /zh variant)
- Support clean taxonomy routing (/category/:category and /tag/:tag)
- Dynamically populate categories and tags in sitemap.xml
- Fix header scroll padding/margin offsets for anchor and reference links
- Constrain image and media widths to prevent content overflow
- Redesign homepage recent posts to 4 compact editorial cards
- Restore valid binary favicon.ico and high-res icon assets
- Remove placeholder content and sample test comments

views/pages/blogs.ejs

@@ -28,10 +28,14 @@
       <% }) %>
     </div>
 
-    <% if (totalPages > 1) { %>
+    <% if (totalPages > 1) { 
+      const filterBaseUrl = activeFilter 
+        ? (activeFilter.type === 'category' ? `/category/${encodeURIComponent(activeFilter.value)}` : `/tag/${encodeURIComponent(activeFilter.value)}`)
+        : '/blogs';
+    %>
       <nav class="pagination-editorial" aria-label="Blog pagination">
         <% if (currentPage > 1) { %>
-          <a href="/blogs?page=<%= currentPage - 1 %><%= activeFilter ? `&${activeFilter.type}=${encodeURIComponent(activeFilter.value)}` : '' %>" class="editorial-nav-link">
+          <a href="<%= filterBaseUrl %>?page=<%= currentPage - 1 %>" class="editorial-nav-link">
             &larr; Previous Page
           </a>
         <% } %>
@@ -41,7 +45,7 @@
         </span>
 
         <% if (currentPage < totalPages) { %>
-          <a href="/blogs?page=<%= currentPage + 1 %><%= activeFilter ? `&${activeFilter.type}=${encodeURIComponent(activeFilter.value)}` : '' %>" class="editorial-nav-link">
+          <a href="<%= filterBaseUrl %>?page=<%= currentPage + 1 %>" class="editorial-nav-link">
             Next Page &rarr;
           </a>
         <% } %>