Fix product images, add-to-cart, and add Sub Categories filter

- Add display:block to .product-card-image so padding-top aspect ratio works on anchor tags
- Add Cache-Control: no-transform header to disable Cloudflare Rocket Loader (was deferring main.js and breaking add-to-cart click handlers)
- Add Sub Categories filter row on shop page using product_types table
- Show category · sub-category on product cards
- Add Sub Categories section to footer
- Preserve subcat param across category/sort filter links

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

assets/css/style.css

@@ -338,6 +338,7 @@ img {
 }
 
 .product-card-image {
+    display: block;
     position: relative;
     padding-top: 100%;
     overflow: hidden;

includes/footer.php

@@ -24,6 +24,17 @@
                     </ul>
                 </div>
 
+                <div>
+                    <h4>Sub Categories</h4>
+                    <ul class="footer-links">
+                        <?php
+                        $footerTypes = db()->fetchAll("SELECT type_id, name FROM product_types WHERE is_active=1 ORDER BY sort_order ASC");
+                        foreach ($footerTypes as $ft): ?>
+                            <li><a href="/shop.php?subcat=<?= urlencode($ft['type_id']) ?>"><?= htmlspecialchars($ft['name']) ?></a></li>
+                        <?php endforeach; ?>
+                    </ul>
+                </div>
+                
                 <div>
                     <h4>Company</h4>
                     <ul class="footer-links">

includes/header.php

@@ -6,6 +6,7 @@
 if (session_status() === PHP_SESSION_NONE) {
     session_start();
 }
+header('Cache-Control: no-store, no-cache, must-revalidate, no-transform');
 
 require_once __DIR__ . '/db.php';
 require_once __DIR__ . '/../config/config.php';

shop.php

@@ -8,6 +8,7 @@ require_once __DIR__ . '/includes/functions.php';
 
 // Get filters
 $category = $_GET['category'] ?? '';
+$subcat = $_GET['subcat'] ?? '';
 $search = $_GET['search'] ?? '';
 $sort = $_GET['sort'] ?? 'newest';
 $page = max(1, intval($_GET['page'] ?? 1));
@@ -21,6 +22,11 @@ if ($category) {
     $params['category'] = $category;
 }
 
+if ($subcat) {
+    $where[] = 'product_type_id = :subcat';
+    $params['subcat'] = $subcat;
+}
+
 if ($search) {
     $where[] = '(name LIKE :search OR description LIKE :search)';
     $params['search'] = '%' . $search . '%';
@@ -42,7 +48,7 @@ $pagination = paginate($totalProducts, $page, 12);
 
 // Get products
 $products = db()->fetchAll(
-    "SELECT * FROM products WHERE {$whereClause} ORDER BY {$orderBy} LIMIT :limit OFFSET :offset",
+    "SELECT p.*, pt.name AS type_name, pt.type_id AS type_slug FROM products p LEFT JOIN product_types pt ON p.product_type_id = pt.type_id WHERE {$whereClause} ORDER BY {$orderBy} LIMIT :limit OFFSET :offset",
     array_merge($params, ['limit' => $pagination['per_page'], 'offset' => $pagination['offset']])
 );
 
@@ -71,15 +77,29 @@ $productTypesList = db()->fetchAll("SELECT type_id, name, slug FROM product_type
 <section class="section">
     <div class="container">
         <!-- Filters Bar -->
-        <div style="display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem;">
+        <div style="display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem;">
-            <div style="display: flex; gap: 1rem; flex-wrap: wrap;">
+            <div style="display: flex; flex-direction: column; gap: 0.75rem;">
-                <a href="/shop.php" class="btn <?= !$category ? 'btn-primary' : 'btn-secondary' ?>">All</a>
+                <div style="display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center;">
-                <?php foreach ($categories as $cat): ?>
+                    <a href="/shop.php<?= $subcat ? '?subcat=' . urlencode($subcat) : '' ?>" class="btn <?= !$category ? 'btn-primary' : 'btn-secondary' ?>">All</a>
-                    <a href="/shop.php?category=<?= urlencode($cat['category']) ?>" 
+                    <?php foreach ($categories as $cat): ?>
-                       class="btn <?= $category === $cat['category'] ? 'btn-primary' : 'btn-secondary' ?>">
+                        <a href="/shop.php?category=<?= urlencode($cat['category']) ?><?= $subcat ? '&subcat=' . urlencode($subcat) : '' ?>"
-                        <?= htmlspecialchars(ucfirst($cat['category'])) ?>
+                           class="btn <?= $category === $cat['category'] ? 'btn-primary' : 'btn-secondary' ?>">
-                    </a>
+                            <?= htmlspecialchars(ucfirst($cat['category'])) ?>
-                <?php endforeach; ?>
+                        </a>
+                    <?php endforeach; ?>
+                </div>
+                <?php if (!empty($productTypesList)): ?>
+                <div style="display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center;">
+                    <span class="text-muted" style="font-size: 0.85rem; font-weight: 600; white-space: nowrap;">Sub Categories:</span>
+                    <a href="/shop.php<?= $category ? '?category=' . urlencode($category) : '' ?>" class="btn btn-sm <?= !$subcat ? 'btn-primary' : 'btn-secondary' ?>">All</a>
+                    <?php foreach ($productTypesList as $pt): ?>
+                        <a href="/shop.php?subcat=<?= urlencode($pt['type_id']) ?><?= $category ? '&category=' . urlencode($category) : '' ?>"
+                           class="btn btn-sm <?= $subcat === $pt['type_id'] ? 'btn-primary' : 'btn-secondary' ?>">
+                            <?= htmlspecialchars($pt['name']) ?>
+                        </a>
+                    <?php endforeach; ?>
+                </div>
+                <?php endif; ?>
             </div>
             
             <div style="display: flex; gap: 1rem; align-items: center;">
@@ -87,24 +107,39 @@ $productTypesList = db()->fetchAll("SELECT type_id, name, slug FROM product_type
                     <?php if ($category): ?>
                         <input type="hidden" name="category" value="<?= htmlspecialchars($category) ?>">
                     <?php endif; ?>
+                    <?php if ($subcat): ?>
+                        <input type="hidden" name="subcat" value="<?= htmlspecialchars($subcat) ?>">
+                    <?php endif; ?>
                     <input type="text" name="search" class="form-input" placeholder="Search..."
                            value="<?= htmlspecialchars($search) ?>" style="width: 200px;">
                     <button type="submit" class="btn btn-secondary"><i class="fas fa-search"></i></button>
                 </form>
-                
+                <?php
+                    $filterQs = http_build_query(array_filter(['category' => $category, 'subcat' => $subcat]));
+                    $filterQs = $filterQs ? '&' . $filterQs : '';
+                ?>
                 <select onchange="window.location.href=this.value" class="form-select" style="width: auto;">
-                    <option value="/shop.php?sort=newest<?= $category ? '&category=' . urlencode($category) : '' ?>" <?= $sort === 'newest' ? 'selected' : '' ?>>Newest</option>
+                    <option value="/shop.php?sort=newest<?= $filterQs ?>" <?= $sort === 'newest' ? 'selected' : '' ?>>Newest</option>
-                    <option value="/shop.php?sort=price_low<?= $category ? '&category=' . urlencode($category) : '' ?>" <?= $sort === 'price_low' ? 'selected' : '' ?>>Price: Low to High</option>
+                    <option value="/shop.php?sort=price_low<?= $filterQs ?>" <?= $sort === 'price_low' ? 'selected' : '' ?>>Price: Low to High</option>
-                    <option value="/shop.php?sort=price_high<?= $category ? '&category=' . urlencode($category) : '' ?>" <?= $sort === 'price_high' ? 'selected' : '' ?>>Price: High to Low</option>
+                    <option value="/shop.php?sort=price_high<?= $filterQs ?>" <?= $sort === 'price_high' ? 'selected' : '' ?>>Price: High to Low</option>
-                    <option value="/shop.php?sort=name<?= $category ? '&category=' . urlencode($category) : '' ?>" <?= $sort === 'name' ? 'selected' : '' ?>>Name</option>
+                    <option value="/shop.php?sort=name<?= $filterQs ?>" <?= $sort === 'name' ? 'selected' : '' ?>>Name</option>
                 </select>
             </div>
         </div>
         
         <!-- Results count -->
+        <?php
+            $subcatName = '';
+            if ($subcat) {
+                foreach ($productTypesList as $pt) {
+                    if ($pt['type_id'] === $subcat) { $subcatName = $pt['name']; break; }
+                }
+            }
+        ?>
         <p class="text-muted" style="margin-bottom: 1.5rem;">
             Showing <?= count($products) ?> of <?= $totalProducts ?> products
             <?= $category ? ' in ' . htmlspecialchars(ucfirst($category)) : '' ?>
+            <?= $subcatName ? ' &middot; ' . htmlspecialchars($subcatName) : '' ?>
         </p>
         
         <!-- Product Grid -->
@@ -132,8 +167,13 @@ $productTypesList = db()->fetchAll("SELECT type_id, name, slug FROM product_type
                             <?php endif; ?>
                         </a>
                         <div class="product-card-body">
-                            <?php if ($product['category']): ?>
+                            <?php if ($product['category'] || !empty($product['type_name'])): ?>
-                                <div class="product-card-category"><?= htmlspecialchars($product['category']) ?></div>
+                                <div class="product-card-category">
+                                    <?= htmlspecialchars($product['category'] ?? '') ?>
+                                    <?php if (!empty($product['type_name'])): ?>
+                                        <?= $product['category'] ? ' &middot; ' : '' ?><?= htmlspecialchars($product['type_name']) ?>
+                                    <?php endif; ?>
+                                </div>
                             <?php endif; ?>
                             <h3 class="product-card-title">
                                 <a href="/product.php?id=<?= $product['product_id'] ?>"><?= htmlspecialchars($product['name']) ?></a>