feat: move navigation to dashboard sidebar and bump SAC to 0.5.0

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/App.vue

@@ -1,33 +1,5 @@
 <template>
   <div class="layout">
-    <nav v-if="showNav">
-      <span class="brand">{{ appTitle }}</span>
-      <RouterLink to="/dashboard">Dashboard</RouterLink>
-      <RouterLink to="/events">События</RouterLink>
-      <RouterLink to="/reports">Отчёты</RouterLink>
-      <RouterLink to="/problems">Проблемы</RouterLink>
-      <RouterLink to="/hosts">Хосты</RouterLink>
-      <button type="button" class="secondary" @click="logout">Выход</button>
-    </nav>
     <RouterView />
   </div>
 </template>
-
-<script setup lang="ts">
-import { computed } from "vue";
-import { useRoute, useRouter } from "vue-router";
-import { clearToken, getToken } from "./api";
-import { APP_VERSION_LABEL } from "./version";
-
-const appTitle = APP_VERSION_LABEL;
-
-const route = useRoute();
-const router = useRouter();
-
-const showNav = computed(() => route.path !== "/login" && !!getToken());
-
-function logout() {
-  clearToken();
-  router.push("/login");
-}
-</script>