fix(telegram): use configured proxy for outbound API calls

The proxy configuration (`channels.telegram.proxy`) was only used for
the gateway monitor (polling), but not for outbound sends (sendMessage,
reactMessage, deleteMessage). This caused outbound messages to bypass
the configured proxy, which is problematic for users behind corporate
proxies or those who want to route all traffic through a specific proxy.

This change ensures that all three outbound functions use the same
proxy configuration as the monitor:
- sendMessageTelegram
- reactMessageTelegram
- deleteMessageTelegram

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/telegram/send.ts

@@ -19,6 +19,7 @@ import { isGifMedia } from "../media/mime.js";
 import { loadWebMedia } from "../web/media.js";
 import { resolveTelegramAccount } from "./accounts.js";
 import { resolveTelegramFetch } from "./fetch.js";
+import { makeProxyFetch } from "./proxy.js";
 import { renderTelegramHtmlText } from "./format.js";
 import { resolveMarkdownTableMode } from "../config/markdown-tables.js";
 import { splitTelegramCaption } from "./caption.js";
@@ -162,7 +163,9 @@ export async function sendMessageTelegram(
   const chatId = normalizeChatId(target.chatId);
   // Use provided api or create a new Bot instance. The nullish coalescing
   // operator ensures api is always defined (Bot.api is always non-null).
-  const fetchImpl = resolveTelegramFetch();
+  const proxyUrl = account.config.proxy;
+  const proxyFetch = proxyUrl ? makeProxyFetch(proxyUrl as string) : undefined;
+  const fetchImpl = resolveTelegramFetch(proxyFetch);
   const timeoutSeconds =
     typeof account.config.timeoutSeconds === "number" &&
     Number.isFinite(account.config.timeoutSeconds)
@@ -416,7 +419,9 @@ export async function reactMessageTelegram(
   const token = resolveToken(opts.token, account);
   const chatId = normalizeChatId(String(chatIdInput));
   const messageId = normalizeMessageId(messageIdInput);
-  const fetchImpl = resolveTelegramFetch();
+  const proxyUrl = account.config.proxy;
+  const proxyFetch = proxyUrl ? makeProxyFetch(proxyUrl as string) : undefined;
+  const fetchImpl = resolveTelegramFetch(proxyFetch);
   const client: ApiClientOptions | undefined = fetchImpl
     ? { fetch: fetchImpl as unknown as ApiClientOptions["fetch"] }
     : undefined;
@@ -468,7 +473,9 @@ export async function deleteMessageTelegram(
   const token = resolveToken(opts.token, account);
   const chatId = normalizeChatId(String(chatIdInput));
   const messageId = normalizeMessageId(messageIdInput);
-  const fetchImpl = resolveTelegramFetch();
+  const proxyUrl = account.config.proxy;
+  const proxyFetch = proxyUrl ? makeProxyFetch(proxyUrl as string) : undefined;
+  const fetchImpl = resolveTelegramFetch(proxyFetch);
   const client: ApiClientOptions | undefined = fetchImpl
     ? { fetch: fetchImpl as unknown as ApiClientOptions["fetch"] }
     : undefined;