feat: implement token-complete telegram connect flow via bot button

frontend/app.vue

@@ -598,6 +598,7 @@ const telegramConnectBusy = ref(false);
 const telegramRefreshBusy = ref(false);
 const telegramConnectUrl = ref("");
 const telegramConnections = ref<TelegramConnectionSummary[]>([]);
+const telegramConnectNotice = ref("");
 
 const telegramStatusLabel = computed(() => {
   if (telegramConnectStatusLoading.value) return "Checking";
@@ -697,6 +698,39 @@ async function refreshTelegramBusinessConnectionFromApi() {
   }
 }
 
+async function completeTelegramBusinessConnectFromToken(token: string) {
+  const t = String(token || "").trim();
+  if (!t) return;
+
+  try {
+    const result = await $fetch<{
+      ok: boolean;
+      status: string;
+      businessConnectionId?: string;
+    }>("/api/omni/telegram/business/connect/complete", {
+      method: "POST",
+      body: { token: t },
+    });
+
+    if (result?.ok) {
+      telegramConnectStatus.value = "connected";
+      telegramConnectNotice.value = "Telegram успешно привязан.";
+      await loadTelegramConnectStatus();
+      return;
+    }
+
+    if (result?.status === "awaiting_telegram_start") {
+      telegramConnectNotice.value = "Сначала нажмите Start в Telegram, затем нажмите кнопку в боте снова.";
+    } else if (result?.status === "invalid_or_expired_token") {
+      telegramConnectNotice.value = "Ссылка привязки истекла. Нажмите Connect в CRM заново.";
+    } else {
+      telegramConnectNotice.value = "Не удалось завершить привязку. Запустите Connect заново.";
+    }
+  } catch {
+    telegramConnectNotice.value = "Ошибка завершения привязки. Попробуйте снова.";
+  }
+}
+
 function pilotToUiMessage(message: PilotMessage): UIMessage {
   return {
     id: message.id,
@@ -2012,6 +2046,14 @@ onMounted(() => {
 
   uiPathSyncLocked.value = true;
   try {
+    const params = new URLSearchParams(window.location.search);
+    const tgLinkToken = String(params.get("tg_link_token") ?? "").trim();
+    if (tgLinkToken) {
+      void completeTelegramBusinessConnectFromToken(tgLinkToken);
+      params.delete("tg_link_token");
+      const nextSearch = params.toString();
+      window.history.replaceState({}, "", `${window.location.pathname}${nextSearch ? `?${nextSearch}` : ""}`);
+    }
     applyPathToUi(window.location.pathname, window.location.search);
   } finally {
     uiPathSyncLocked.value = false;
@@ -4057,6 +4099,9 @@ async function decideFeedCard(card: FeedCard, decision: "accepted" | "rejected")
                         {{ telegramRefreshBusy ? "Syncing..." : "Refresh from API" }}
                       </button>
                     </div>
+                    <p v-if="telegramConnectNotice" class="text-[11px] leading-snug text-base-content/70">
+                      {{ telegramConnectNotice }}
+                    </p>
                   </div>
 
                   <div class="mt-3 border-t border-base-300 pt-2">