msc: translate login screen

frontend/src/components/LoginScreen.vue

@@ -2,9 +2,9 @@
     <navbar />
     <va-modal v-model="showModal" :overlay="false" no-dismiss without-transitions hide-default-actions>
         <va-form autofocus tag="form" @submit.prevent="handleSubmit" class="login-form">
-            <va-input label="Username" v-model="username" class="form-item" />
+            <va-input label="Имя пользователя" v-model="username" class="form-item" />
-            <va-input type="password" label="Password" v-model="password" class="form-item" />
+            <va-input type="password" label="Пароль" v-model="password" class="form-item" />
-            <va-button type="submit" class="form-item">Login</va-button>
+            <va-button type="submit" class="form-item">Войти</va-button>
         </va-form>
     </va-modal>
     <va-modal v-model="errorModal" hide-default-actions message="Неверный логин или пароль" />