fix: render logic for LoadingAlert and incorrect error title

frontend/app/components/ErrorAlert.vue

@@ -1,6 +1,6 @@
 <template>
     <div>
-        <v-alert density="compact" :text="error" :title="error || 'Chyba'" type="error" class="mb-2 mt-2"></v-alert>
+        <v-alert density="compact" :text="error" :title="title || 'Chyba'" type="error" class="mb-2 mt-2"></v-alert>
     </div>
 </template>
 

frontend/app/pages/dashboard/student/internship/create.vue

@@ -41,7 +41,7 @@ async function handleInternshipRegistration(internship: NewInternship) {
             <br />
 
             <!-- Čakajúca hláška -->
-            <LoadingAlert />
+            <LoadingAlert v-if="loading" />
 
             <!-- Chybová hláška -->
             <ErrorAlert v-if="error" :error="error" />

frontend/app/pages/dashboard/student/internship/edit/[id].vue

@@ -52,7 +52,7 @@ async function handleUpdateOfBasicInfo(internship: NewInternship) {
             <div style="height: 40px;"></div>
 
             <!-- Čakajúca hláška -->
-            <LoadingAlert />
+            <LoadingAlert v-if="loading" />
 
             <!-- Chybová hláška -->
             <ErrorAlert v-if="action_error" :error="action_error" />
@@ -84,7 +84,7 @@ async function handleUpdateOfBasicInfo(internship: NewInternship) {
             <div>
                 <h2>Nahratie dokumentov</h2>
 
-                <ErrorAlert v-if="data?.status.status !== InternshipStatus.CONFIRMED"
+                <ErrorAlert v-if="data?.status.status !== InternshipStatus.CONFIRMED" title="Blokované"
                     error='Vaša prax nie je v stave "Schválená" a teda nemôžete nahrať dokumenty.' />
 
                 <InternshipDocumentEditor v-else :internship="data!" @successful-submit="refresh" />