Add a Declined chip to the bench attendance sheet, drop silent's yellow tint

Silent and declined are both left out of the default "Responded" view, but
only silent had its own chip to review -- declined now gets one too. The
silent-row background tint is gone; nothing else on this screen tints rows,
and the chip itself already says which bucket you're looking at.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

mobile/coach_views.py

@@ -169,8 +169,9 @@ class CoachAttendanceView(CoachScopeMixin, LoginRequiredMixin, TemplateView):
     #: param) means "Responded" (IN_STATUSES: present/selected/maybe), the
     #: default view. A coach doesn't need to check in someone silent or
     #: declined -- neither is expected to show up -- so those are left out of
-    #: the default rather than needing to be filtered away each time.
-    FILTERS = {"silent"}
+    #: the default rather than needing to be filtered away each time; each
+    #: still gets its own chip to review who's in either bucket.
+    FILTERS = {"silent", "declined"}
 
     def get_event(self):
         if self.active_team is None:
@@ -195,6 +196,8 @@ class CoachAttendanceView(CoachScopeMixin, LoginRequiredMixin, TemplateView):
             filter_param = ""
         if filter_param == "silent":
             rows = [row for row in attendances if row.is_silent]
+        elif filter_param == "declined":
+            rows = [row for row in attendances if row.status in OUT_STATUSES]
         else:
             rows = [row for row in attendances if row.status in IN_STATUSES]
 
@@ -204,6 +207,7 @@ class CoachAttendanceView(CoachScopeMixin, LoginRequiredMixin, TemplateView):
             total_count=len(attendances),
             responded_count=sum(1 for row in attendances if row.status in IN_STATUSES),
             silent_count=sum(1 for row in attendances if row.is_silent),
+            declined_count=sum(1 for row in attendances if row.status in OUT_STATUSES),
             checked_in_count=sum(1 for row in attendances if row.showed_up is not None),
             filter_param=filter_param,
             **kwargs,