fix: minor fixes and template updates

- seed_demo.py: Change company owner role from "user" to "vendor"
- header.html: Update header partial styling/content
- marketplace.js: Minor JS updates
- marketplace.html: Template updates

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

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

app/templates/admin/marketplace.html

@@ -5,10 +5,6 @@
 
 {% block alpine_data %}adminMarketplace(){% endblock %}
 
-{% block extra_scripts %}
-<script src="/static/admin/js/marketplace.js"></script>
-{% endblock %}
-
 {% block content %}
 <!-- Page Header -->
 <div class="flex items-center justify-between my-6">
@@ -180,7 +176,7 @@
                         German CSV
                     </button>
                 </div>
-                <p class="mt-1 text-xs text-gray-500 dark:text-gray-400" x-show="!selectedVendor?.letzshop_csv_url_fr && !selectedVendor?.letzshop_csv_url_en && !selectedVendor?.letzshop_csv_url_de">
+                <p class="mt-1 text-xs text-red-600 dark:text-red-400" x-show="!selectedVendor?.letzshop_csv_url_fr && !selectedVendor?.letzshop_csv_url_en && !selectedVendor?.letzshop_csv_url_de">
                     This vendor has no Letzshop CSV URLs configured
                 </p>
             </div>
@@ -511,3 +507,7 @@
     </div>
 </div>
 {% endblock %}
+
+{% block extra_scripts %}
+<script src="{{ url_for('static', path='admin/js/marketplace.js') }}"></script>
+{% endblock %}

app/templates/admin/partials/header.html

@@ -24,12 +24,8 @@
             <li class="flex">
                 <button class="rounded-md focus:outline-none focus:shadow-outline-purple"
                         @click="toggleTheme" aria-label="Toggle color mode">
-                    <template x-if="!dark">
-                        <span x-html="$icon('moon', 'w-5 h-5')"></span>
-                    </template>
-                    <template x-if="dark">
-                        <span x-html="$icon('sun', 'w-5 h-5')"></span>
-                    </template>
+                    <span x-show="!dark" x-html="$icon('moon', 'w-5 h-5')"></span>
+                    <span x-show="dark" x-html="$icon('sun', 'w-5 h-5')"></span>
                 </button>
             </li>