fix: merchant-user-detail page derives role from user.role instead of owned_merchants_count

The User Type status card used owned_merchants_count to determine
Owner vs Team Member. Now uses user.role directly. Label changed
from "User Type" to "Role".

The other owned_merchants_count references (delete guards in
user-edit.js and user-detail.js, count display card, debug log)
are correct — they use the actual count for business logic, not
role derivation.

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

app/modules/tenancy/templates/tenancy/admin/merchant-user-detail.html

@@ -51,17 +51,17 @@
         <!-- User Type -->
         <div class="flex items-center p-4 bg-white rounded-lg shadow-xs dark:bg-gray-800">
             <div class="p-3 mr-4 rounded-full"
-                 :class="merchantUser?.owned_merchants_count > 0
+                 :class="merchantUser?.role === 'merchant_owner'
                      ? 'text-orange-500 bg-orange-100 dark:text-orange-100 dark:bg-orange-500'
                      : 'text-blue-500 bg-blue-100 dark:text-blue-100 dark:bg-blue-500'">
-                <span x-html="$icon(merchantUser?.owned_merchants_count > 0 ? 'office-building' : 'user-group', 'w-5 h-5')"></span>
+                <span x-html="$icon(merchantUser?.role === 'merchant_owner' ? 'office-building' : 'user-group', 'w-5 h-5')"></span>
             </div>
             <div>
                 <p class="mb-2 text-sm font-medium text-gray-600 dark:text-gray-400">
-                    User Type
+                    Role
                 </p>
                 <p class="text-lg font-semibold text-gray-700 dark:text-gray-200"
-                   x-text="merchantUser?.owned_merchants_count > 0 ? 'Owner' : 'Team Member'">
+                   x-text="merchantUser?.role === 'merchant_owner' ? 'Merchant Owner' : 'Store Member'">
                     -
                 </p>
             </div>