Feature: new "report a bug" modal (#13530)

* WIP: report a bug api/ui

* fix lint

* add USER_USERNAME

* extend sendTxn tests / checks + fix bug report email

* fix lint

* add more checks to sendTxn - fix bug-report variables

* fix lint / ci

* fix test: reset email config url

* fix test stub

* fix tests

* refactor the variables checks

* lint.

* move bug-report page as a modal

* send user_email to the email

* show true/false instead 1/0

* fix issues

* fix footer report bug email if not logged in

* fix styles/margins

* prefill user's email

* show facebook email if local email not existing

* bugReportSuccessModal.vue

* add BROWSER_UA to mail properties

* extract bugReportLogic to its own lib file for unit test

* test api validators

* fix lint

website/client/src/components/appFooter.vue

@@ -82,9 +82,17 @@
                 {{ $t('hall') }}
               </router-link>
             </li>
-            <li>
+            <li v-if="user">
               <a
-                :href="bugReportMailto"
+                @click.prevent="openBugReportModal()"
+                target="_blank"
+              >
+                {{ $t('reportBug') }}
+              </a>
+            </li>
+            <li v-else>
+              <a
+                href="mailto:admin@habitica.com?subject=Habitica Web Bug Report"
                 target="_blank"
               >
                 {{ $t('reportBug') }}