style: standardize string formatting and improve readability across multiple files

- Refactored string formatting in various files to use consistent double quotes.
- Improved readability by adding newlines in function definitions and method calls.
- Cleaned up unnecessary imports and ensured proper spacing for better code clarity.
- Updated management commands and context processors for consistent formatting.
- Enhanced the overall maintainability of the codebase by adhering to PEP 8 guidelines.
- Applied Ruff linting and formatting

src/pkmntrade_club/accounts/models.py

@@ -3,24 +3,28 @@ from django.db import models
 from django.core.exceptions import ValidationError
 import re
 
+
 def validate_friend_code(value):
     """Validate that friend code follows the format XXXX-XXXX-XXXX-XXXX where X is a digit."""
-    if not re.match(r'^\d{4}-\d{4}-\d{4}-\d{4}$', value):
+    if not re.match(r"^\d{4}-\d{4}-\d{4}-\d{4}$", value):
         raise ValidationError(
-            'Friend code must be in format XXXX-XXXX-XXXX-XXXX where X is a digit.'
+            "Friend code must be in format XXXX-XXXX-XXXX-XXXX where X is a digit."
         )
 
+
 class CustomUser(AbstractUser):
-    default_friend_code = models.ForeignKey("FriendCode", on_delete=models.SET_NULL, null=True, blank=True)
+    default_friend_code = models.ForeignKey(
+        "FriendCode", on_delete=models.SET_NULL, null=True, blank=True
+    )
     show_friend_code_on_link_previews = models.BooleanField(
         default=False,
         verbose_name="Show Friend Code on Link Previews",
-        help_text="This will primarily affect share link previews on X, Discord, etc."
+        help_text="This will primarily affect share link previews on X, Discord, etc.",
     )
     enable_email_notifications = models.BooleanField(
         default=True,
         verbose_name="Enable Email Notifications",
-        help_text="Receive trade notifications via email."
+        help_text="Receive trade notifications via email.",
     )
     reputation_score = models.IntegerField(default=0)
 
@@ -47,10 +51,13 @@ class CustomUser(AbstractUser):
             self.default_friend_code = other_codes.first()
             self.save(update_fields=["default_friend_code"])
 
+
 class FriendCode(models.Model):
     friend_code = models.CharField(max_length=19, validators=[validate_friend_code])
     in_game_name = models.CharField(max_length=14, null=False, blank=False)
-    user = models.ForeignKey(CustomUser, on_delete=models.PROTECT, related_name='friend_codes')
+    user = models.ForeignKey(
+        CustomUser, on_delete=models.PROTECT, related_name="friend_codes"
+    )
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
 
@@ -67,4 +74,4 @@ class FriendCode(models.Model):
             self.user.save(update_fields=["default_friend_code"])
 
     def __str__(self):
-        return self.friend_code
+        return self.friend_code