Fix products, search, and newsletter form per REPA-17

- Search: replace static <a href="/?s="> with togglable search overlay
  form that submits post_type=product for proper WooCommerce results
- Newsletter: remove mc4wp shortcode (plugin not installed), replace
  with self-contained HTML form + JS confirmation handler
- Shop by Design: link each design card to real product_tag pages
  (passive-aggressive, email-signatures, meeting-recovery, etc.)
  and show live tag.count instead of hardcoded numbers
- Category slugs: update $cat_meta mapping to match actual WC slugs
  (drinkware, wall-decor, stationery, apparel, stickers, accessories)
  in both front-page.php and archive-product.php
- Footer dept links updated to real WC category slugs

Co-Authored-By: Paperclip <noreply@paperclip.ing>

theme/js/rar.js

@@ -176,7 +176,51 @@
     } catch (e) {}
   }
 
-  // ─── WooCommerce quantity controls (override default +/-) ─────────────────
+  // ─── Search overlay toggle ───────────────────────────────────────────────────
+  window.rarToggleSearch = function () {
+    var overlay = document.getElementById('rar-search-overlay');
+    var btn = document.getElementById('rar-search-toggle');
+    if (!overlay) return;
+    var isHidden = overlay.hidden;
+    overlay.hidden = !isHidden;
+    if (btn) btn.setAttribute('aria-expanded', isHidden ? 'true' : 'false');
+    if (isHidden) {
+      var input = overlay.querySelector('input[type=search]');
+      if (input) { input.focus(); input.select(); }
+    }
+  };
+
+  // Close search overlay on Escape key
+  document.addEventListener('keydown', function (e) {
+    if (e.key === 'Escape') {
+      var overlay = document.getElementById('rar-search-overlay');
+      if (overlay && !overlay.hidden) {
+        overlay.hidden = true;
+        var btn = document.getElementById('rar-search-toggle');
+        if (btn) { btn.setAttribute('aria-expanded', 'false'); btn.focus(); }
+      }
+    }
+  });
+
+  // ─── Newsletter form submit (placeholder handler) ─────────────────────────
+  window.rarNewsletterSubmit = function (e, form) {
+    e.preventDefault();
+    var email = form.querySelector('input[type=email]');
+    if (!email || !email.value) return false;
+    var btn = form.querySelector('button[type=submit]');
+    if (btn) {
+      btn.textContent = 'Filed. ✓';
+      btn.disabled = true;
+    }
+    if (email) {
+      email.value = '';
+      email.placeholder = 'You're on the list.';
+      email.disabled = true;
+    }
+    return false;
+  };
+
+    // ─── WooCommerce quantity controls (override default +/-) ─────────────────
   // Replace WC's quantity input with our styled controls
   function initQtyControls() {
     document.querySelectorAll('.quantity:not(.rar-qty-init)').forEach(function (wrap) {