Add backlogger app at /backlogger/ with login protection

Django app with Item model (games/books/films/other categories), CRUD
views, and login-required access. Login page at /accounts/login/ uses
custom dark-themed template consistent with the site design.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backlogger/migrations/0001_initial.py

@@ -0,0 +1,32 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name='Item',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('category', models.CharField(choices=[('games', 'Games'), ('books', 'Books'), ('films', 'Films'), ('other', 'Other')], max_length=10)),
+                ('name', models.CharField(max_length=200)),
+                ('progress_percent', models.FloatField(default=0.0)),
+                ('favorite', models.BooleanField(default=False)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('hours_played', models.FloatField(blank=True, null=True)),
+                ('total_hours', models.FloatField(blank=True, null=True)),
+                ('pages_read', models.IntegerField(blank=True, null=True)),
+                ('total_pages', models.IntegerField(blank=True, null=True)),
+                ('watched', models.BooleanField(blank=True, null=True)),
+                ('duration_minutes', models.IntegerField(blank=True, null=True)),
+            ],
+            options={
+                'ordering': ['-favorite', 'name'],
+            },
+        ),
+    ]