Ask which language the content is written in

The Instruction agent now confirms the output language before the plan is
ready: Bahasa Indonesia, English or 中文, the languages the engine writes
in. It can also be named in the instruction ("pakai bahasa Inggris"), is
read from short replies, and can be changed in the plan. Research alone
is not asked about.

The engine's content production has no language field, so the choice
goes into the agent's instructions; video schedules also set
video_options.language. ruleOf reads it back, so editing a topic keeps
it. The audio player recognises Chinese scripts and uses a zh-CN voice.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/i18n.ts

@@ -280,6 +280,11 @@ const en = {
   'agent.askWeekday': 'Weekly internet research{about}: which day should it run? It is set to Monday for now.',
   'agent.askTopic': 'What topic should this be about?\n{list}\nType a topic, or use the whole Brain.',
   'agent.ready': 'Everything is clear: {n} schedules are ready. You can still change them in the plan. Shall I start them?',
+  'agent.readyLanguage': 'Everything is clear: {n} schedules are ready, with content written in {language}. You can still change them in the plan. Shall I start them?',
+  'agent.askLanguage': 'Which language should the content be written in?',
+  'agent.languageSet': 'Content will be written in {language}.',
+  'ins.language': 'Content language',
+  'ins.languagePending': 'Not chosen yet',
   'agent.skipped': 'OK, I skipped “{part}”.',
   'agent.removed': 'Removed {rule}.',
   'agent.updated': 'Updated: {rule}.',
@@ -644,6 +649,11 @@ const id: Record<Key, string> = {
   'agent.askWeekday': 'Riset internet mingguan{about}: dijalankan hari apa? Sementara diatur ke Senin.',
   'agent.askTopic': 'Topiknya tentang apa?\n{list}\nTulis topiknya, atau pakai seluruh Otak.',
   'agent.ready': 'Semua sudah jelas: {n} jadwal siap. Anda masih bisa mengubahnya di rencana. Mulai sekarang?',
+  'agent.readyLanguage': 'Semua sudah jelas: {n} jadwal siap, dengan konten berbahasa {language}. Anda masih bisa mengubahnya di rencana. Mulai sekarang?',
+  'agent.askLanguage': 'Kontennya mau ditulis dalam bahasa apa?',
+  'agent.languageSet': 'Konten akan ditulis dalam {language}.',
+  'ins.language': 'Bahasa konten',
+  'ins.languagePending': 'Belum dipilih',
   'agent.skipped': 'Oke, “{part}” saya lewati.',
   'agent.removed': '{rule} dihapus.',
   'agent.updated': 'Diperbarui: {rule}.',