fix: show Products tab without vendor filter

Remove x-if="selectedVendor" condition from Products tab button and panel
so products are visible when no vendor is selected.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/templates/admin/marketplace-letzshop.html

@@ -122,9 +122,7 @@
 
     <!-- Tabs -->
     {% call tabs_nav(tab_var='activeTab') %}
-        <template x-if="selectedVendor">
-            <span>{{ tab_button('products', 'Products', tab_var='activeTab', icon='cube') }}</span>
-        </template>
+        {{ tab_button('products', 'Products', tab_var='activeTab', icon='cube') }}
         {{ tab_button('orders', 'Orders', tab_var='activeTab', icon='shopping-cart', count_var='orderStats.pending') }}
         {{ tab_button('exceptions', 'Exceptions', tab_var='activeTab', icon='exclamation-circle', count_var='exceptionStats.pending') }}
         <template x-if="selectedVendor">
@@ -135,12 +133,10 @@
         </template>
     {% endcall %}
 
-    <!-- Products Tab (Import + Export) - Vendor only -->
-    <template x-if="selectedVendor">
-        {{ tab_panel('products', tab_var='activeTab') }}
-            {% include 'admin/partials/letzshop-products-tab.html' %}
-        {{ endtab_panel() }}
-    </template>
+    <!-- Products Tab -->
+    {{ tab_panel('products', tab_var='activeTab') }}
+        {% include 'admin/partials/letzshop-products-tab.html' %}
+    {{ endtab_panel() }}
 
     <!-- Orders Tab -->
     {{ tab_panel('orders', tab_var='activeTab') }}