Features: 1) Add avatar_url property to User model.

Fixes: 1) Restore correct imports order in `engine/vibes_auth/models.py`.

Extra: 1) Adjust formatting and grouping for clarity in imports section.

engine/vibes_auth/models.py

@@ -6,20 +6,21 @@ from django.contrib.auth.models import Group as BaseGroup
 from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.db.models import (
-    BooleanField,
-    CharField,
-    EmailField,
-    ImageField,
-    JSONField,
-    UUIDField,
-    ForeignKey,
-    TextField,
-    DateTimeField,
-    Index,
     CASCADE,
     SET_NULL,
+    BooleanField,
+    CharField,
+    DateTimeField,
+    EmailField,
+    ForeignKey,
+    ImageField,
+    Index,
+    JSONField,
+    TextField,
+    UUIDField,
 )
 from django.utils import timezone
+from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 from rest_framework_simplejwt.token_blacklist.models import (
     BlacklistedToken as BaseBlacklistedToken,
@@ -29,10 +30,10 @@ from rest_framework_simplejwt.token_blacklist.models import (
 )
 
 from engine.core.abstract import NiceModel
+from engine.payments.models import Balance
 from engine.vibes_auth.choices import SenderType, ThreadStatus
 from engine.vibes_auth.managers import UserManager
 from engine.vibes_auth.validators import validate_phone_number
-from engine.payments.models import Balance
 
 
 class User(AbstractUser, NiceModel):  # type: ignore [django-manager-missing]
@@ -98,6 +99,10 @@ class User(AbstractUser, NiceModel):  # type: ignore [django-manager-missing]
     # noinspection PyClassVar
     objects = UserManager()  # type: ignore [misc, assignment]
 
+    @cached_property
+    def avatar_url(self):
+        return self.avatar.url
+
     def add_to_recently_viewed(self, product_uuid):
         recently_viewed = self.recently_viewed
         if product_uuid not in recently_viewed: