feat(tenancy): add profile editing in merchant team edit modal

Edit modal now has editable first_name, last_name, email fields with
a "Save Profile" button, alongside the existing per-store role management.

New:
- PUT /merchants/account/team/members/{user_id}/profile endpoint
- MerchantTeamProfileUpdate schema
- update_team_member_profile() service method with ownership validation
- 2 new i18n keys across 4 locales (personal_info, save_profile)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/tenancy/templates/tenancy/merchant/team.html

@@ -271,26 +271,41 @@
 <!-- ==================== EDIT MODAL ==================== -->
 {% call modal('editModal', _('tenancy.team.edit_member'), 'showEditModal', size='md', show_footer=false) %}
     <div x-show="selectedMember" class="space-y-4">
-        <!-- Member info (read-only) -->
-        <div class="flex items-center gap-3 pb-4 border-b border-gray-200 dark:border-gray-700">
-            <div class="w-10 h-10 rounded-full bg-purple-100 dark:bg-purple-900 flex items-center justify-center">
-                <span class="text-sm font-semibold text-purple-600 dark:text-purple-300"
-                      x-text="selectedMember ? getInitials(selectedMember) : ''"></span>
+        <!-- Profile fields -->
+        <div class="space-y-3">
+            <h4 class="text-sm font-medium text-gray-700 dark:text-gray-300">{{ _('tenancy.team.personal_info') }}</h4>
+            <div class="grid grid-cols-2 gap-3">
+                <div>
+                    <label class="block text-xs font-medium text-gray-600 dark:text-gray-400 mb-1">{{ _('tenancy.team.first_name') }}</label>
+                    <input type="text" x-model="selectedMember.first_name"
+                           class="w-full px-3 py-2 text-sm text-gray-700 dark:text-gray-300 bg-white dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none focus:ring focus:ring-purple-300 dark:focus:ring-purple-600"
+                           placeholder="{{ _('tenancy.team.first_name') }}">
+                </div>
+                <div>
+                    <label class="block text-xs font-medium text-gray-600 dark:text-gray-400 mb-1">{{ _('tenancy.team.last_name') }}</label>
+                    <input type="text" x-model="selectedMember.last_name"
+                           class="w-full px-3 py-2 text-sm text-gray-700 dark:text-gray-300 bg-white dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none focus:ring focus:ring-purple-300 dark:focus:ring-purple-600"
+                           placeholder="{{ _('tenancy.team.last_name') }}">
+                </div>
             </div>
             <div>
-                <p class="font-medium text-gray-900 dark:text-white">
-                    <span x-text="selectedMember?.first_name || ''"></span>
-                    <span x-text="selectedMember?.last_name || ''"></span>
-                    <span x-show="!selectedMember?.first_name && !selectedMember?.last_name"
-                          x-text="selectedMember?.email"></span>
-                </p>
-                <p class="text-sm text-gray-500 dark:text-gray-400" x-text="selectedMember?.email"
-                   x-show="selectedMember?.first_name || selectedMember?.last_name"></p>
+                <label class="block text-xs font-medium text-gray-600 dark:text-gray-400 mb-1">{{ _('tenancy.team.email') }}</label>
+                <input type="email" x-model="selectedMember.email"
+                       class="w-full px-3 py-2 text-sm text-gray-700 dark:text-gray-300 bg-white dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none focus:ring focus:ring-purple-300 dark:focus:ring-purple-600"
+                       placeholder="{{ _('tenancy.team.email') }}">
+            </div>
+            <div class="flex justify-end">
+                <button @click="updateMemberProfile(selectedMember.user_id, selectedMember.first_name, selectedMember.last_name, selectedMember.email)"
+                        :disabled="saving"
+                        class="px-3 py-1.5 text-xs font-medium text-white bg-purple-600 rounded-md hover:bg-purple-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors">
+                    <span x-show="saving" x-html="$icon('spinner', 'w-3 h-3 mr-1')"></span>
+                    {{ _('tenancy.team.save_profile') }}
+                </button>
             </div>
         </div>
 
         <!-- Per-store role management -->
-        <div class="space-y-3">
+        <div class="space-y-3 pt-4 border-t border-gray-200 dark:border-gray-700">
             <h4 class="text-sm font-medium text-gray-700 dark:text-gray-300">{{ _('tenancy.team.store_roles') }}</h4>
             <template x-for="store in selectedMember?.stores || []" :key="store.store_id">
                 <div class="flex items-center justify-between p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg">