Pull request 2115: ADG-7924-stats-interval

Squashed commit of the following:

commit 2c7ee92
Merge: 67313ec 4698579
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Dec 20 19:04:44 2023 +0300

    Merge branch 'master' into ADG-7924-stats-interval

commit 67313ec
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Dec 19 20:02:31 2023 +0300

    all: imp docs

commit f073dc4
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Dec 19 18:33:51 2023 +0300

    upd: chlog

commit 109dbb1
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Dec 19 17:23:58 2023 +0300

    stats: interval

CHANGELOG.md

@@ -33,6 +33,7 @@ NOTE: Add new changes BELOW THIS COMMENT.
 
 ### Fixed
 
+- Statistics for 7 days displayed as 168 hours on the dashboard.
 - Pre-filling the Edit static lease window with data ([#6534]).
 - Names defined in the `/etc/hosts` for a single address family wrongly
   considered undefined for another family ([#6541]).

internal/stats/unit.go

@@ -484,7 +484,7 @@ func (s *StatsCtx) fillCollectedStats(data *StatsResp, units []*unitDB, curID ui
 	data.TimeUnits = timeUnitsHours
 
 	daysCount := size / 24
-	if daysCount > 7 {
+	if daysCount >= 7 {
 		size = daysCount
 		data.TimeUnits = timeUnitsDays
 	}
@@ -510,6 +510,10 @@ func (s *StatsCtx) fillCollectedStats(data *StatsResp, units []*unitDB, curID ui
 
 // fillCollectedStatsDaily fills data with collected daily statistics.  units
 // must contain data for the count of days.
+//
+// TODO(s.chzhen):  Improve collection of statistics for frontend.  Dashboard
+// cards should contain statistics for the whole interval without rounding to
+// days.
 func (s *StatsCtx) fillCollectedStatsDaily(
 	data *StatsResp,
 	units []*unitDB,