feat: Implement group-restricted Live Sessions & IP Monitoring and 1-click Admin Email Confirmation

backend/apps/users/models.py

@@ -86,3 +86,21 @@ class GuestClaimToken(models.Model):
 
     def __str__(self):
         return f"Claim Token for {self.guest_name} ({self.token})"
+
+class UserActivity(models.Model):
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, null=True, blank=True, related_name='activities')
+    guest_name = models.CharField(max_length=150, null=True, blank=True)
+    session_key = models.CharField(max_length=255, db_index=True)
+    ip_address = models.CharField(max_length=50, blank=True, default='')
+    user_agent = models.CharField(max_length=255, blank=True, default='')
+    last_path = models.CharField(max_length=255, blank=True, default='')
+    last_seen = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ['-last_seen']
+        verbose_name = 'Benutzer-Aktivität / Sitzung'
+        verbose_name_plural = 'Benutzer-Aktivitäten / Sitzungen'
+
+    def __str__(self):
+        name = self.user.get_display_name() if self.user else (self.guest_name or "Gast")
+        return f"{name} ({self.ip_address}) - {self.last_seen}"