First commit of claude's rework in django + vanillajs fronted

apps/tools/migrations/0002_shotgroup_ammo_batch.py

@@ -0,0 +1,20 @@
+# Generated by Django 4.2.16 on 2026-03-24 13:42
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gears', '0003_ammo_brass_bullet_powder_primer_alter_bipod_options_and_more'),
+        ('tools', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='shotgroup',
+            name='ammo_batch',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='shot_groups', to='gears.reloadedammobatch', verbose_name='reloaded ammo batch'),
+        ),
+    ]