v1.2.0 - Fix product selection, cart pricing, admin tabs + CI/CD

Fix three critical bugs that persisted through v1.1.11-v1.1.14:

- Product selection always empty: meta_query checked _product_type in
  postmeta, but WooCommerce uses the product_type taxonomy. Replaced
  with correct tax_query using NOT IN operator.
- Cart price always 0.00: composable_price_calculated flag persisted
  in session, preventing recalculation on page loads. Removed flag;
  static variable already handles per-request dedup.
- Admin tabs both visible on load: JS now triggers WooCommerce native
  tab click instead of manually toggling panel visibility.

Add Gitea CI/CD release workflow triggered on v* tags.

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

includes/Cart_Handler.php

@@ -200,7 +200,7 @@ class Cart_Handler {
             return;
         }
 
-        // Use static flag to prevent multiple executions
+        // Use static flag to prevent multiple executions within the same request
         static $already_calculated = false;
         if ($already_calculated) {
             return;
@@ -208,13 +208,10 @@ class Cart_Handler {
 
         foreach ($cart->get_cart() as $cart_item_key => $cart_item) {
             if (isset($cart_item['data']) && $cart_item['data']->get_type() === 'composable') {
-                if (isset($cart_item['composable_products']) && !isset($cart_item['composable_price_calculated'])) {
+                if (isset($cart_item['composable_products'])) {
                     $product = $cart_item['data'];
                     $price = $product->calculate_composed_price($cart_item['composable_products']);
                     $cart_item['data']->set_price($price);
-
-                    // Mark as calculated to prevent re-calculation by other plugins
-                    $cart->cart_contents[$cart_item_key]['composable_price_calculated'] = true;
                 }
             }
         }