The user pointed out that the only genuinely per-user AI surface is
portfolio analysis. The strategic log AND the email digest are both
shared cycles — generated once per cycle, consumed by many users.
For the digest, this means:
- _generate_variants still produces one English variant per tone (as
today, unchanged)
- A new helper translates each variant once per active non-en lang in
parallel via asyncio.gather, producing a {(tone, lang): content}
table for the duration of the job run
- The per-user send loop selects (user.digest_tone, user.lang),
falling back to the English variant of the same tone on miss
Translation count per run = tones × non-en active langs = 3 today.
100 Italian users no longer mean 100 translation calls.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
11 TDD-style tasks: i18n service, translation helper, model + migration,
ai_log_job translation fan-out, per-user surfaces (analyse, digest),
localized /log endpoint, PATCH /api/settings/language, dropdown UI, and
final regression + manual smoke.
Per-user surfaces append "Respond in Italian." to the system prompt
(one extra line, no extra LLM call). The strategic log is generated in
English, then fanned out to translate() per active non-en language in
parallel via asyncio.gather. The /log endpoint serves the matching
translation row when present, English fallback otherwise.
Translation uses the default call_llm provider chain — no separate
cheap-model carve-out needed at DeepSeek's $0.28/M output pricing.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
