Add billing-ending banner, events CRUD, RBIHF import, public API, team photos, and sponsors

A large batch of club-management features built up over one session:

- Club dashboard banner warning admins 1 month before billing ends
- Full Events/EventSeries CRUD (recurrence builder, occurrence lifecycle,
  per-team permissions), with match->game rename and game-specific fields
  (score, competition, live status, external game ID)
- Django-admin competition dropdown, gated per-club by feature flag
- Auto-import of RBIHF fixtures (scrape -> diff -> preview -> confirm),
  with location/opponent dropdowns suggested from existing club data
- Feature-flag-gated Shop/Forms nav sections, reusing the same flag
  machinery for the RBIHF import button
- Team roster now scoped to members active this season or next, sorted and
  grouped by position
- Club sport type (ice hockey / other), shown in the control panel's club
  subtitle
- Per-season team photo upload from the team page
- New public read-only API (Django Ninja) at /api/v1/: news, team rosters,
  upcoming/live/per-team games, and sponsors -- auto-documented via Swagger
  UI, CORS-enabled for a club's own external website
- Club sponsors: admin-only CRUD (logo, URL, active date window) plus a
  date-windowed, optionally randomized API endpoint
- Assorted fixes: NullBooleanField dropdown rendering, cross-club event
  validation timing, searchable-select chip placement, btn-neutral ->
  default button style sweep, calendar-month chart windows

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01R1gj3J1QPfP38XWpnpbFpy

templates/_base.html

@@ -127,6 +127,10 @@
 
                     {% block main %}{% endblock main %}
                 </div>
+
+                <footer class="mx-auto w-full px-8 pb-6 text-center text-xs opacity-60">
+                    &copy; {% now "Y" %} Bernard Siebens &middot; <a class="link link-hover" href="mailto:info@rosterchief.app">info@rosterchief.app</a>
+                </footer>
             </main>
         </div>
 

templates/account/logout.html

@@ -26,7 +26,7 @@
         {{ redirect_field }}
 
         <div class="flex flex-wrap items-center justify-end gap-2">
-            <a class="btn btn-outline btn-neutral gap-2" href="/">{% lucide "arrow-left" size=16 %} {% trans "Cancel" %}</a>
+            <a class="btn btn-outline gap-2" href="/">{% lucide "arrow-left" size=16 %} {% trans "Cancel" %}</a>
             <button class="btn btn-primary gap-2" type="submit">{% lucide "log-out" size=16 %} {% trans "Sign Out" %}</button>
         </div>
     </form>

templates/allauth/elements/button.html

@@ -9,7 +9,7 @@
 {% endcomment %}
 {% comment %} djlint:off {% endcomment %}
 <{% if attrs.href %}a href="{{ attrs.href }}"{% else %}button{% endif %}
-class="btn gap-2 {% if attrs.tags and 'danger' in attrs.tags %}btn-error{% elif attrs.tags and 'link' in attrs.tags %}btn-link{% elif attrs.tags and 'secondary' in attrs.tags %}btn-outline btn-neutral{% elif attrs.tags and 'outline' in attrs.tags %}btn-outline btn-primary{% else %}btn-primary{% endif %}"
+class="btn gap-2 {% if attrs.tags and 'danger' in attrs.tags %}btn-error{% elif attrs.tags and 'link' in attrs.tags %}btn-link{% elif attrs.tags and 'secondary' in attrs.tags %}btn-outline{% elif attrs.tags and 'outline' in attrs.tags %}btn-outline btn-primary{% else %}btn-primary{% endif %}"
 {% if attrs.form %}form="{{ attrs.form }}"{% endif %}
 {% if attrs.id %}id="{{ attrs.id }}"{% endif %}
 {% if attrs.name %}name="{{ attrs.name }}"{% endif %}

templates/mfa/authenticate.html

@@ -33,7 +33,7 @@
         </div>
 
         <div class="flex flex-wrap items-center justify-end gap-2">
-            <button class="btn btn-outline btn-neutral gap-2" type="submit" form="logout-from-stage">{% lucide "x" size=16 %} {% trans "Cancel" %}</button>
+            <button class="btn btn-outline gap-2" type="submit" form="logout-from-stage">{% lucide "x" size=16 %} {% trans "Cancel" %}</button>
             <button class="btn btn-primary gap-2" type="submit">{% lucide "log-in" size=16 %} {% trans "Sign In" %}</button>
         </div>
     </form>