feat(bot): add Telegram bot i18n foundation

apps/bot/src/bot-i18n.test.ts

@@ -0,0 +1,79 @@
+import { describe, expect, test } from 'bun:test'
+
+import { createTelegramBot } from './bot'
+
+function helpUpdate(languageCode: string) {
+  return {
+    update_id: 9001,
+    message: {
+      message_id: 1,
+      date: Math.floor(Date.now() / 1000),
+      chat: {
+        id: 123456,
+        type: 'private'
+      },
+      from: {
+        id: 123456,
+        is_bot: false,
+        first_name: 'Stan',
+        language_code: languageCode
+      },
+      text: '/help',
+      entities: [
+        {
+          offset: 0,
+          length: 5,
+          type: 'bot_command'
+        }
+      ]
+    }
+  }
+}
+
+describe('createTelegramBot i18n', () => {
+  test('replies with Russian help text for Russian users', async () => {
+    const bot = createTelegramBot('000000:test-token')
+    const calls: Array<{ method: string; payload: unknown }> = []
+
+    bot.botInfo = {
+      id: 999000,
+      is_bot: true,
+      first_name: 'Household Test Bot',
+      username: 'household_test_bot',
+      can_join_groups: true,
+      can_read_all_group_messages: false,
+      supports_inline_queries: false,
+      can_connect_to_business: false,
+      has_main_web_app: false,
+      has_topics_enabled: true,
+      allows_users_to_create_topics: false
+    }
+
+    bot.api.config.use(async (_prev, method, payload) => {
+      calls.push({ method, payload })
+
+      return {
+        ok: true,
+        result: {
+          message_id: calls.length,
+          date: Math.floor(Date.now() / 1000),
+          chat: {
+            id: 123456,
+            type: 'private'
+          },
+          text: 'ok'
+        }
+      } as never
+    })
+
+    await bot.handleUpdate(helpUpdate('ru') as never)
+
+    expect(calls[0]?.payload).toMatchObject({
+      chat_id: 123456
+    })
+
+    const payload = calls[0]?.payload as { text?: string } | undefined
+    expect(payload?.text).toContain('Бот для дома подключен.')
+    expect(payload?.text).toContain('/anon - Отправить анонимное сообщение по дому')
+  })
+})