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fix(history): date candles in Jakarta time, not UTC

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MSN stamps each IDX trading day at local midnight (17:00Z the previous
day), so every MSN candle was labelled one day early. Yahoo weekly and
monthly bars have the same stamp and were labelled Sunday / last day of
the previous month. Take the date in the exchange offset instead: Yahoo's
meta.gmtoffset when present, else WIB (UTC+7).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ld3fDSDiBzAaQvgZJX5NKM
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Claude 2026-10-02 14:27:49 +00:00
commit 0ba3d805a7
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6 changed files with 43 additions and 4 deletions
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2
src/api/msn/parse.rs
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@ -78,7 +78,7 @@ mod tests {
let history = parse_history_from_str("BBCA.JK", &raw).expect("chart fixture parsed");
assert_eq!(history.len(), 3);
assert_eq!(history[0].date.to_string(), "2026-01-13");
assert_eq!(history[0].date.to_string(), "2026-01-14");
assert_eq!(history[0].close, 8000);
}