Checkpoint: management app redesign, onboarding/signup workflow, and events calendar backend

Large uncommitted body of work accumulated across sessions on this branch --
committing as a checkpoint so it's tracked and future worktree-isolated agents
see the real codebase instead of a stale ancestor commit. Covers the
management app's dedicated Tailwind theme and templates, the club onboarding
requirement/signup workflow (club/services/onboarding.py, requirement/status
models, sign-up dashboard), fee/status auto-activation decoupling, referee
management, and the new events calendar grid service layer.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ECGMEwrc2k4D8VQuwjstj9

features/migrations/0003_jobrun.py

@@ -0,0 +1,34 @@
+# Generated by Django 6.0.6 on 2026-08-16 14:01
+
+import uuid
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('features', '0002_maintenance'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='JobRun',
+            fields=[
+                ('created', models.DateTimeField(auto_now_add=True, verbose_name='created')),
+                ('modified', models.DateTimeField(auto_now=True, verbose_name='modified')),
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('task_id', models.CharField(max_length=255, unique=True, verbose_name='task id')),
+                ('name', models.CharField(help_text='Dotted Celery task name, e.g. billing.tasks.renew_subscriptions.', max_length=255, verbose_name='task name')),
+                ('status', models.CharField(choices=[('started', 'Started'), ('success', 'Success'), ('failure', 'Failed')], default='started', max_length=10, verbose_name='status')),
+                ('started_at', models.DateTimeField(verbose_name='started at')),
+                ('finished_at', models.DateTimeField(blank=True, null=True, verbose_name='finished at')),
+                ('detail', models.TextField(blank=True, help_text='What the task returned, on success.', verbose_name='detail')),
+                ('error', models.TextField(blank=True, help_text='What the task raised, on failure.', verbose_name='error')),
+            ],
+            options={
+                'verbose_name': 'job run',
+                'verbose_name_plural': 'job runs',
+                'ordering': ['-started_at'],
+            },
+        ),
+    ]