feat: add slug-only dashboard profile filter and unify backend imports

frontend/src/lib/components/health/HealthMatrix.svelte

@@ -9,6 +9,8 @@
   @UX_REATIVITY: State: $state, Derived: $derived.
 -->
 <script>
+  import { t } from '$lib/i18n';
+
   /** @type {{ 
    *    pass_count: number, 
    *    warn_count: number, 
@@ -39,35 +41,35 @@
     </div>
   {:else if error}
     <div class="p-4 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg text-red-700 dark:text-red-400">
-      <p class="font-medium">Failed to load health summary</p>
+      <p class="font-medium">{$t.health?.load_failed}</p>
       <p class="text-sm">{error}</p>
     </div>
   {:else}
     <div class="grid grid-cols-2 md:grid-cols-4 gap-4">
       <div class="p-4 bg-green-50 dark:bg-green-900/20 border border-green-200 dark:border-green-800 rounded-lg text-center">
         <div class="text-2xl font-bold text-green-700 dark:text-green-400">🟢 {pass_count}</div>
-        <div class="text-xs text-green-600 dark:text-green-500 uppercase tracking-wider font-semibold">Pass</div>
+        <div class="text-xs text-green-600 dark:text-green-500 uppercase tracking-wider font-semibold">{$t.health?.status_pass}</div>
       </div>
       
       <div class="p-4 bg-yellow-50 dark:bg-yellow-900/20 border border-yellow-200 dark:border-yellow-800 rounded-lg text-center">
         <div class="text-2xl font-bold text-yellow-700 dark:text-yellow-400">🟡 {warn_count}</div>
-        <div class="text-xs text-yellow-600 dark:text-yellow-500 uppercase tracking-wider font-semibold">Warn</div>
+        <div class="text-xs text-yellow-600 dark:text-yellow-500 uppercase tracking-wider font-semibold">{$t.health?.status_warn}</div>
       </div>
       
       <div class="p-4 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg text-center">
         <div class="text-2xl font-bold text-red-700 dark:text-red-400">🔴 {fail_count}</div>
-        <div class="text-xs text-red-600 dark:text-red-500 uppercase tracking-wider font-semibold">Fail</div>
+        <div class="text-xs text-red-600 dark:text-red-500 uppercase tracking-wider font-semibold">{$t.health?.status_fail}</div>
       </div>
 
       <div class="p-4 bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg text-center">
         <div class="text-2xl font-bold text-gray-700 dark:text-gray-300">⚪ {unknown_count}</div>
-        <div class="text-xs text-gray-600 dark:text-gray-500 uppercase tracking-wider font-semibold">Unknown</div>
+        <div class="text-xs text-gray-600 dark:text-gray-500 uppercase tracking-wider font-semibold">{$t.health?.status_unknown}</div>
       </div>
     </div>
     
     {#if total === 0}
       <div class="mt-4 p-8 text-center border-2 border-dashed border-gray-200 dark:border-gray-700 rounded-xl text-gray-500 dark:text-gray-400">
-        No validation records found for this environment.
+        {$t.health?.no_records_for_environment}
       </div>
     {/if}
   {/if}
@@ -76,4 +78,4 @@
 <style>
   /* Tailwind handles most styling, custom tweaks here if needed */
 </style>
-<!-- [/DEF:HealthMatrix:Component] -->
+<!-- [/DEF:HealthMatrix:Component] -->

frontend/src/lib/components/layout/Sidebar.svelte

@@ -65,6 +65,22 @@
   let failingDashboardCount = $derived(failingCountState.current || 0);
   let expandedCategories = $state(new Set(["dashboards"]));
 
+  function withExpandedCategory(categoryId) {
+    const next = new Set(expandedCategories);
+    next.add(categoryId);
+    expandedCategories = next;
+  }
+
+  function toggleExpandedCategory(categoryId) {
+    const next = new Set(expandedCategories);
+    if (next.has(categoryId)) {
+      next.delete(categoryId);
+    } else {
+      next.add(categoryId);
+    }
+    expandedCategories = next;
+  }
+
   // Keep active category valid after RBAC filtering.
   $effect(() => {
     if (
@@ -81,8 +97,7 @@
   // Keep active category expanded after route/user change.
   $effect(() => {
     if (activeCategory && !expandedCategories.has(activeCategory)) {
-      expandedCategories.add(activeCategory);
-      expandedCategories = expandedCategories;
+      withExpandedCategory(activeCategory);
     }
   });
 
@@ -118,18 +133,12 @@
         `[Sidebar][Action] Expand sidebar and category ${categoryId}`,
       );
       toggleSidebar();
-      expandedCategories.add(categoryId);
-      expandedCategories = expandedCategories;
+      withExpandedCategory(categoryId);
       return;
     }
 
     console.log(`[Sidebar][Action] Toggle category ${categoryId}`);
-    if (expandedCategories.has(categoryId)) {
-      expandedCategories.delete(categoryId);
-    } else {
-      expandedCategories.add(categoryId);
-    }
-    expandedCategories = expandedCategories;
+    toggleExpandedCategory(categoryId);
   }
 
   function handleSubItemClick(categoryId, path) {

frontend/src/lib/i18n/locales/en.json

@@ -73,6 +73,26 @@
     "admin_llm": "LLM Providers",
     "profile": "Profile"
   },
+  "health": {
+    "title": "Dashboard Health Center",
+    "subtitle": "Monitor the latest validation status across your environments.",
+    "environment_label": "Environment:",
+    "all_environments": "All Environments",
+    "validation_details": "Validation Details",
+    "table_dashboard": "Dashboard",
+    "table_environment": "Environment",
+    "table_status": "Status",
+    "table_last_check": "Last Check",
+    "table_summary": "Summary",
+    "no_records": "No validation records found.",
+    "no_records_for_environment": "No validation records found for this environment.",
+    "view_report": "View Report",
+    "load_failed": "Failed to load health summary",
+    "status_pass": "Pass",
+    "status_warn": "Warn",
+    "status_fail": "Fail",
+    "status_unknown": "Unknown"
+  },
   "llm": {
     "providers_title": "LLM Providers",
     "add_provider": "Add Provider",
@@ -428,6 +448,7 @@
     "superset_account": "Your Apache Superset Account",
     "superset_account_placeholder": "Enter your Apache Superset username",
     "show_only_my_dashboards": "Show only my dashboards by default",
+    "show_only_slug_dashboards": "Show only dashboards with slug by default",
     "save_preferences": "Save Preferences",
     "lookup_loading": "Loading Superset accounts...",
     "lookup_error": "Cannot load Superset accounts for this environment right now. You can enter username manually.",
@@ -456,9 +477,9 @@
     "table_density_compact": "Compact",
     "table_density_comfortable": "Comfortable",
     "auto_open_task_drawer": "Automatically open task drawer for long-running tasks",
-    "filter_badge_active": "My Dashboards Only",
+    "filter_badge_active": "Profile filters active",
     "filter_badge_override": "Showing all dashboards temporarily",
-    "filter_empty_state": "No dashboards found for your account. Try adjusting your filter settings.",
+    "filter_empty_state": "No dashboards found for active profile filters. Try adjusting your filter settings.",
     "filter_show_all_temporarily": "Show all dashboards temporarily",
     "filter_restore_default": "Restore default filter",
     "saving": "Saving...",

frontend/src/lib/i18n/locales/ru.json

@@ -73,6 +73,26 @@
     "admin_llm": "Провайдеры LLM",
     "profile": "Профиль"
   },
+  "health": {
+    "title": "Центр здоровья дашбордов",
+    "subtitle": "Отслеживайте последние результаты валидации по всем окружениям.",
+    "environment_label": "Окружение:",
+    "all_environments": "Все окружения",
+    "validation_details": "Детали валидации",
+    "table_dashboard": "Дашборд",
+    "table_environment": "Окружение",
+    "table_status": "Статус",
+    "table_last_check": "Последняя проверка",
+    "table_summary": "Сводка",
+    "no_records": "Записи валидации не найдены.",
+    "no_records_for_environment": "Для этого окружения записи валидации не найдены.",
+    "view_report": "Открыть отчет",
+    "load_failed": "Не удалось загрузить сводку здоровья",
+    "status_pass": "Успех",
+    "status_warn": "Предупреждение",
+    "status_fail": "Ошибка",
+    "status_unknown": "Неизвестно"
+  },
   "llm": {
     "providers_title": "Провайдеры LLM",
     "add_provider": "Добавить провайдера",
@@ -426,6 +446,7 @@
     "superset_account": "Ваш аккаунт Apache Superset",
     "superset_account_placeholder": "Введите имя пользователя Apache Superset",
     "show_only_my_dashboards": "Показывать только мои дашборды по умолчанию",
+    "show_only_slug_dashboards": "Показывать только дашборды со slug по умолчанию",
     "save_preferences": "Сохранить настройки",
     "lookup_loading": "Загрузка аккаунтов Superset...",
     "lookup_error": "Сейчас не удается загрузить аккаунты Superset для этого окружения. Вы можете ввести имя пользователя вручную.",
@@ -454,9 +475,9 @@
     "table_density_compact": "Компактная",
     "table_density_comfortable": "Комфортная",
     "auto_open_task_drawer": "Автоматически открывать Task Drawer для долгих задач",
-    "filter_badge_active": "Только мои дашборды",
+    "filter_badge_active": "Активны фильтры профиля",
     "filter_badge_override": "Временно показаны все дашборды",
-    "filter_empty_state": "Для вашего аккаунта дашборды не найдены. Попробуйте изменить настройки фильтра.",
+    "filter_empty_state": "По активным фильтрам профиля дашборды не найдены. Попробуйте изменить настройки фильтра.",
     "filter_show_all_temporarily": "Временно показать все дашборды",
     "filter_restore_default": "Вернуть фильтр по умолчанию",
     "saving": "Сохранение...",