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

club/migrations/0026_memberrequirementstatus_is_bypassed_and_more.py

@@ -0,0 +1,35 @@
+# Generated by Django 6.0.6 on 2026-08-17 11:39
+
+import club.models
+import rosterchief.storage
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('club', '0025_onboardingrequirement_memberrequirementstatus_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='memberrequirementstatus',
+            name='is_bypassed',
+            field=models.BooleanField(default=False, verbose_name='bypassed'),
+        ),
+        migrations.AddField(
+            model_name='onboardingrequirement',
+            name='blocked_event_kinds',
+            field=models.JSONField(blank=True, default=list, help_text="Event kinds a member can't be invited to or selected for while this is open. Empty means purely informational.", verbose_name='blocks selection for'),
+        ),
+        migrations.AlterField(
+            model_name='clubrole',
+            name='role',
+            field=models.CharField(choices=[('admin', 'admin'), ('member', 'member'), ('editor', 'editor'), ('member_admin', 'member admin')], default='member', max_length=250, verbose_name='role'),
+        ),
+        migrations.AlterField(
+            model_name='memberrequirementstatus',
+            name='document',
+            field=models.FileField(blank=True, help_text="Stored privately -- readable only through this member's own page, never a direct link.", storage=rosterchief.storage.PrivateStorage(location='/Users/bernard/Code/PycharmProjects/RosterChief/private_media'), upload_to=club.models.onboarding_document_path, verbose_name='document'),
+        ),
+    ]