feat: add customer account page with profile information and actions

- Create Account.vue page component with user profile display
- Add account route to router.js
- Update Navbar.vue to remove avatar button (moved to Dock)
- Add avatar icon to Dock.vue for account page navigation
- Implement 'Contact us' action that opens manager chat via Telegram
- Implement 'Add to home screen' feature using Telegram Web App API 8.0+
- Add home screen status checking with checkHomeScreenStatus API
- Display customer registration date and days with us counter
- Add Russian language declension for days word (день/дня/дней)
- Update TelegramCustomerHandler to return created_at in saveOrUpdate response
- Add getByTelegramUserId method to TelecartCustomerService
- Store customer_created_at in Pulse store during app initialization
- Update App.vue to show Dock on account page
- Remove unused getCurrentCustomer API endpoint and function

frontend/spa/src/components/Dock.vue

@@ -60,6 +60,22 @@
       </div>
       <span class="dock-label">Корзина</span>
     </RouterLink>
+
+    <RouterLink
+        :to="{name: 'account'}"
+        :class="{'dock-active': route.name === 'account'}"
+        @click="onDockItemClick"
+    >
+      <div v-if="tgData?.user?.photo_url" class="w-6 h-6 rounded-full overflow-hidden">
+        <img :src="tgData?.user?.photo_url" alt="avatar" class="w-full h-full object-cover"/>
+      </div>
+      <div v-else class="bg-primary text-primary-content w-6 h-6 rounded-full flex items-center justify-center">
+        <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="size-4">
+          <path stroke-linecap="round" stroke-linejoin="round" d="M15.75 6a3.75 3.75 0 1 1-7.5 0 3.75 3.75 0 0 1 7.5 0ZM4.501 20.118a7.5 7.5 0 0 1 14.998 0A17.933 17.933 0 0 1 12 21.75c-2.676 0-5.216-.584-7.499-1.632Z" />
+        </svg>
+      </div>
+      <span class="dock-label">Профиль</span>
+    </RouterLink>
   </div>
 </template>
 
@@ -67,10 +83,12 @@
 import {useRoute} from "vue-router";
 import {useCartStore} from "@/stores/CartStore.js";
 import {useSettingsStore} from "@/stores/SettingsStore.js";
+import {useTgData} from "@/composables/useTgData.js";
 
 const route = useRoute();
 const cart = useCartStore();
 const settings = useSettingsStore();
+const tgData = useTgData();
 const haptic = window.Telegram.WebApp.HapticFeedback;
 
 function onDockItemClick() {