Fix one-off issue for monthly subs (#14643)

* Fix initial plan.consecutive.offset for 1 month subs

* fix initial values for group plan subs

* Make perkMonthCount editable in admin panel

* Add aditional info to admin panel

* Implement automatic fix for affected users

* fix(lint): exclusive test, code style

* fixes

* fix issue with initialization

---------

Co-authored-by: SabreCat <sabe@habitica.com>

website/client/src/components/admin-panel/user-support/subscriptionAndPerks.vue

@@ -17,10 +17,18 @@
           Payment schedule ("basic-earned" is monthly):
           <strong>{{ hero.purchased.plan.planId }}</strong>
         </div>
+        <div v-if="hero.purchased.plan.planId == 'group_plan_auto'">
+          Group plan ID:
+          <strong>{{ hero.purchased.plan.owner }}</strong>
+        </div>
         <div v-if="hero.purchased.plan.dateCreated">
           Creation date:
           <strong>{{ dateFormat(hero.purchased.plan.dateCreated) }}</strong>
         </div>
+        <div v-if="hero.purchased.plan.dateCurrentTypeCreated">
+          Start date for current subscription type:
+          <strong>{{ dateFormat(hero.purchased.plan.dateCurrentTypeCreated) }}</strong>
+        </div>
         <div>
           Termination date:
           <strong
@@ -46,9 +54,16 @@
           Perk offset months:
           <strong>{{ hero.purchased.plan.consecutive.offset }}</strong>
         </div>
-        <div>
+        <div class="form-inline">
           Perk month count:
-          <strong>{{ hero.purchased.plan.perkMonthCount }}</strong>
+          <input
+              v-model="hero.purchased.plan.perkMonthCount"
+              class="form-control"
+              type="number"
+              min="0"
+              max="2"
+              step="1"
+            >
         </div>
         <div>
           Next Mystic Hourglass: