feat: add Отчество field to admin user detail page

- Add middle_name input to the edit form (3-column name grid)
- Save middle_name in the edit handler
- Show role selector for admin role (previously system-only)

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

web/routes/admin.py

@@ -296,6 +296,7 @@ async def admin_edit_user(user_id: int, request: Request, db: Session = Depends(
 
     user.first_name = data["first_name"]
     user.last_name = data["last_name"]
+    user.middle_name = data.get("middle_name") or None
     if data.get("email"):
         user.email = data["email"]
     if data.get("phone"):

web/templates/admin/user_detail.html

@@ -137,7 +137,7 @@
     <div class="card">
       <div class="card-title" style="margin-bottom:14px;">Редактировать</div>
       <form method="post" action="/admin/users/{{ target.id }}/edit">
-        <div style="display:grid;grid-template-columns:1fr 1fr;gap:12px;">
+        <div style="display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;">
           <div class="form-row">
             <label class="form-lbl" for="first_name">Имя</label>
             <input class="inp" type="text" id="first_name" name="first_name" value="{{ target.first_name }}" required>
@@ -146,6 +146,10 @@
             <label class="form-lbl" for="last_name">Фамилия</label>
             <input class="inp" type="text" id="last_name" name="last_name" value="{{ target.last_name }}" required>
           </div>
+          <div class="form-row">
+            <label class="form-lbl" for="middle_name">Отчество</label>
+            <input class="inp" type="text" id="middle_name" name="middle_name" value="{{ target.middle_name or '' }}">
+          </div>
         </div>
         <div class="form-row">
           <label class="form-lbl" for="email">Email</label>
@@ -155,7 +159,7 @@
           <label class="form-lbl" for="phone">Телефон</label>
           <input class="inp" type="tel" id="phone" name="phone" value="{{ target.phone }}">
         </div>
-        {% if user.role == 'system' %}
+        {% if user.role in ('system', 'admin') %}
         <div class="form-row">
           <label class="form-lbl" for="role">Роль</label>
           <select class="inp" id="role" name="role">