feat(search): add keyboard hide button and auto-hide Dock

- Add floating keyboard hide button that appears on search input focus
- Create KeyboardStore to manage keyboard state globally
- Auto-hide Dock component when keyboard is open on search page
- Position keyboard hide button at bottom when Dock is hidden
- Update keyboard state on focus, blur, and hide actions

frontend/spa/src/App.vue

@@ -42,6 +42,7 @@ import {FullscreenViewport, useMiniApp, useWebAppViewport} from 'vue-tg';
 import {useRoute, useRouter} from "vue-router";
 import {useSettingsStore} from "@/stores/SettingsStore.js";
 import {useProductFiltersStore} from "@/stores/ProductFiltersStore.js";
+import {useKeyboardStore} from "@/stores/KeyboardStore.js";
 import CartButton from "@/components/CartButton.vue";
 import Dock from "@/components/Dock.vue";
 import AppDebugMessage from "@/components/AppDebugMessage.vue";
@@ -58,6 +59,7 @@ const router = useRouter();
 const route = useRoute();
 const settings = useSettingsStore();
 const filtersStore = useProductFiltersStore();
+const keyboardStore = useKeyboardStore();
 const backButton = window.Telegram.WebApp.BackButton;
 const haptic = window.Telegram.WebApp.HapticFeedback;
 const drawerOpen = ref(false);
@@ -70,7 +72,14 @@ const routesToHideAppDock = [
 ];
 
 const isAppDockShown = computed(() => {
-  return routesToHideAppDock.indexOf(route.name) === -1;
+  if (routesToHideAppDock.indexOf(route.name) === -1) {
+    // Скрываем Dock, если клавиатура открыта на странице поиска
+    if (route.name === 'search' && keyboardStore.isOpen) {
+      return false;
+    }
+    return true;
+  }
+  return false;
 });
 
 function navigateBack() {