i18n: localize indicator summaries (per-group + aggregate read)

app/routers/api.py

@@ -36,6 +36,7 @@ from app.models import (
     AICall,
     Headline,
     IndicatorSummary,
+    IndicatorSummaryTranslation,
     JobRun,
     Quote,
     StrategicLog,
@@ -138,6 +139,7 @@ async def indicators(
     as_: str | None = Query(default=None, alias="as"),
     tone: str | None = Query(default=None),
     session: AsyncSession = Depends(get_session),
+    principal: CurrentUser | None = Depends(maybe_current_user),
 ):
     sub = (
         select(Quote.symbol, func.max(Quote.fetched_at).label("mx"))
@@ -205,6 +207,7 @@ async def indicators(
             if as_of_d and (today - as_of_d).days > threshold:
                 stale_symbols.add(r.symbol)
 
+        await _apply_localized_summary(session, summary, principal)
         return templates.TemplateResponse(
             request, "partials/indicators.html",
             {"quotes": rows, "has_anchor": has_anchor,
@@ -340,6 +343,30 @@ async def _localized_content(
     return t.content_md if t is not None else None
 
 
+async def _apply_localized_summary(
+    session: AsyncSession,
+    row: IndicatorSummary | None,
+    principal: CurrentUser | None,
+) -> None:
+    """If ``row`` has a matching translation for ``principal.user.lang``,
+    overwrite the in-memory ``content`` attribute so the template renders
+    the localized version. No DB write happens — the mutation lives only
+    for the lifetime of this GET request.
+    """
+    if row is None or principal is None or principal.user is None:
+        return
+    lang = (principal.user.lang or "en")
+    if lang == "en":
+        return
+    t = (await session.execute(
+        select(IndicatorSummaryTranslation)
+        .where(IndicatorSummaryTranslation.summary_id == row.id)
+        .where(IndicatorSummaryTranslation.lang == lang)
+    )).scalar_one_or_none()
+    if t is not None:
+        row.content = t.content_md
+
+
 def _resolve_tone_param(tone: str | None) -> str:
     """Normalise a query-param tone to one of the two valid values.
     PRO is silently mapped to INTERMEDIATE (see openrouter.PROMPT_VERSION 6)."""
@@ -552,6 +579,7 @@ async def aggregate_summary(
     session: AsyncSession = Depends(get_session),
     as_: str | None = Query(default=None, alias="as"),
     tone: str | None = Query(default=None),
+    principal: CurrentUser | None = Depends(maybe_current_user),
 ):
     wanted_tone = _resolve_tone_param(tone)
     row = (await session.execute(
@@ -573,6 +601,7 @@ async def aggregate_summary(
     statuses = all_statuses()
 
     if as_ == "html":
+        await _apply_localized_summary(session, row, principal)
         return templates.TemplateResponse(
             request, "partials/dashboard_header.html",
             {"summary": row, "markets": statuses, "tone": wanted_tone},