refactor(db): консолидация миграций и рефакторинг кода

Объединены изменения из промежуточных миграций в начальные миграции для упрощения истории базы данных.
Удалены миграции: accounts/0002, discounts/0002, orders/0003-0004, products/0002-0005, user_roles/0002, system_settings/0001-0002, integrations/0001-0002.
Добавлена автоматическая creation пользователя при установке пароля.
Обновлен UI страницы установки пароля с кастомным стилем.
Добавлен conditional rendering для кнопки синхронизации Recommerce.
Исправлены редиректы с 'index' на '/' в accounts views.
Добавлена проверка request.tenant в navbar и authenticate метод в auth backend.

myproject/accounts/migrations/0001_initial.py

@@ -1,6 +1,5 @@
-# Generated by Django 5.0.10 on 2026-01-08 15:58
+# Generated by Django 5.0.10 on 2026-01-14 07:04
 
-import django.contrib.auth.validators
 import django.utils.timezone
 import uuid
 from django.db import migrations, models
@@ -11,7 +10,6 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ('auth', '0012_alter_user_first_name_max_length'),
     ]
 
     operations = [
@@ -21,21 +19,16 @@ class Migration(migrations.Migration):
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('password', models.CharField(max_length=128, verbose_name='password')),
                 ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
-                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
-                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
-                ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
-                ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
-                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
-                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
-                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
                 ('email', models.EmailField(max_length=254, unique=True)),
                 ('name', models.CharField(max_length=100)),
+                ('is_active', models.BooleanField(default=True)),
+                ('is_staff', models.BooleanField(default=False)),
+                ('is_superuser', models.BooleanField(default=False)),
+                ('date_joined', models.DateTimeField(default=django.utils.timezone.now)),
                 ('is_email_confirmed', models.BooleanField(default=False)),
                 ('email_confirmation_token', models.UUIDField(default=uuid.uuid4, editable=False, unique=True)),
                 ('email_confirmed_at', models.DateTimeField(blank=True, null=True)),
                 ('password_reset_token', models.UUIDField(blank=True, editable=False, null=True, unique=True)),
-                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to.', related_name='custom_user_set', to='auth.group', verbose_name='groups')),
-                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='custom_user_set', to='auth.permission', verbose_name='user permissions')),
             ],
             options={
                 'verbose_name': 'Пользователь магазина',