desktop/src-tauri/crates/core/tests/chart_series_grouping.rs

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//! chart_series grouping regressions for the 2026-09-26 period/filter repair:

//! hourly uses hourly_usage; weeks/months aggregate calendar periods, including period_usage;

//! agent/model/instance filters apply; labels match query_summary total-usage results.

// Time labels match total usage: hourly format YYYY-MM-DD HH:00.

// Monday and Wednesday in the same week combine into one weekly period.

// The following week.

// Allowed-instance filter excludes other instances.

// Daily data covers only the week of 2026-09-21; the earlier week has period_usage only.

// The daily-covered week excludes that instance from period rows to avoid duplication.

// Same period set as total-usage results.

// Allowed-instance filtering also applies to period rows.