new model fields & migrations for apps.epic & apps.lyric; new FTs, ITs & UTs passing

; some styling changes effected primarily to _gatekeetper.html modal

src/apps/epic/models.py

@@ -93,13 +93,30 @@ def create_gate_slots(sender, instance, created, **kwargs):
             GateSlot.objects.create(room=instance, slot_number=i)
 
 
+def select_token(user):
+    if user.is_staff:
+        pass_token = user.tokens.filter(token_type=Token.PASS).first()
+        if pass_token:
+            return pass_token
+    coin = user.tokens.filter(token_type=Token.COIN, current_room__isnull=True).first()
+    if coin:
+        return coin
+    free = user.tokens.filter(
+        token_type=Token.FREE,
+        expires_at__gt=timezone.now(),
+    ).order_by("expires_at").first()
+    if free:
+        return free
+    return user.tokens.filter(token_type=Token.TITHE).first()
+
+
 def debit_token(user, slot, token):
     if token.token_type == Token.COIN:
         token.current_room = slot.room
         period = slot.room.renewal_period or timedelta(days=7)
         token.next_ready_at = timezone.now() + period
         token.save()
-    else:
+    elif token.token_type != Token.PASS:
         token.delete()
     slot.gamer = user
     slot.status = GateSlot.FILLED