centralized tocs and paginations loading in Corpus Store @ app init

src/components/nav/HeaderMenu.vue

@@ -1,6 +1,6 @@
 <template>
   <nav id="header-menu">
-    <ul>
+    <ul v-if="corpusLoaded">
       <li><router-link to="/corpus">Corpus</router-link></li>
       <li>
         <span>Indexs</span>
@@ -23,11 +23,18 @@
 
 <script>
 
+import { mapState } from 'vuex'
+
 export default {
   name: 'HeaderMenu',
   data: () => ({
 
-  })
+  }),
+  computed: {
+    ...mapState({
+      corpusLoaded: state => state.Corpus.corpusLoaded
+    })
+  }
 }
 
 </script>

src/components/nav/Search.vue

@@ -1,6 +1,6 @@
 <template>
   <div id="search" class="col-11">
-    <form class="search-form row">
+    <form v-if="corpusLoaded" class="search-form row">
       <fieldset class="search">
         <div>
           <label for="keys">Search</label>
@@ -100,7 +100,8 @@ export default {
       searchTypeOptions: state => state.Search.searchTypeOptions,
       searchTypeValue: state => state.Search.searchTypeValue,
       filters: state => state.Search.filters,
-      activeFilters: state => state.Search.activeFilters
+      activeFilters: state => state.Search.activeFilters,
+      corpusLoaded: state => state.Corpus.corpusLoaded
     }),
     personsOptions () {
       return this.filters.persons.filter(option => !this.activeFilters.persons.includes(option))