Initial commit: Aurora Moments self-hosted photo/video sharing platform

Django/DRF + PostgreSQL/Redis/Celery backend with accounts, library,
moments, and notifications apps; React/TypeScript/Vite frontend with
Instagram-style sidebar nav, feed, profiles, nested comment replies,
notifications, and photo/video upload with ffmpeg-generated posters.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

api/apps/accounts/models.py

@@ -0,0 +1,46 @@
+from django.contrib.auth.models import AbstractUser
+from django.db import models
+
+from apps.core.models import TimeStampedModel
+
+
+class User(AbstractUser):
+    """Aurora Moments account. Email is the login identifier; username is the
+    public @handle shown on profiles."""
+
+    email = models.EmailField(unique=True)
+    display_name = models.CharField(max_length=150, blank=True)
+    bio = models.TextField(max_length=500, blank=True)
+    avatar = models.ImageField(upload_to="avatars/", blank=True, null=True)
+    is_private = models.BooleanField(
+        default=False,
+        help_text="If true, new followers must be approved before they can see followers-only Moments.",
+    )
+
+    USERNAME_FIELD = "email"
+    REQUIRED_FIELDS = ["username"]
+
+    def __str__(self):
+        return self.username
+
+
+class Follow(TimeStampedModel):
+    class Status(models.TextChoices):
+        PENDING = "pending", "Pending"
+        ACCEPTED = "accepted", "Accepted"
+
+    follower = models.ForeignKey(User, related_name="following_edges", on_delete=models.CASCADE)
+    following = models.ForeignKey(User, related_name="follower_edges", on_delete=models.CASCADE)
+    status = models.CharField(max_length=10, choices=Status.choices, default=Status.ACCEPTED)
+
+    class Meta:
+        unique_together = ("follower", "following")
+        constraints = [
+            models.CheckConstraint(
+                check=~models.Q(follower=models.F("following")),
+                name="follow_no_self_follow",
+            )
+        ]
+
+    def __str__(self):
+        return f"{self.follower} -> {self.following} ({self.status})"