Project · Plans: a roadmap, a burndown, milestones, workload

Roadmap lays initiatives across months in lanes: each a bar from its
first day through its last, filled as far as it has come, under the
months' names and a line at today; hover a bar for its dates. Bars sit
at fractions of the span, so nothing is measured, and a strip too
narrow for its months scrolls sideways at a least width per month.
GanttChart and TimelineView are the charts GanttChart.

BurndownChart lives with the charts, on their scales, labels, tiles
and paint: the ideal line from the scope down to nothing, what was left
at each day's end so far, and a line at today; hover a day to read it.

MilestoneProgress shows a milestone's issues done as a bar and a count,
when it is due, and whether it keeps pace: on track, at risk when the
work trails the time gone by more than a tenth, late past its day, or
done. WorkloadView sets each person's points against what they can
take, the bar turning red past it, in columns that line up.

src/charts/schedule.rs

@@ -57,14 +57,14 @@ impl Task {
 }
 
 /// Whole days from `from` to `to`.
-fn days(from: Date, to: Date) -> i32 {
+pub(super) fn days(from: Date, to: Date) -> i32 {
     to.since(from)
         .expect("dates within jiff's range")
         .get_days()
 }
 
 /// Days to mark along a span: each month's first day when the span is long, each Monday when it is short.
-fn marks(first: Date, count: i32) -> Vec<(i32, String)> {
+pub(super) fn marks(first: Date, count: i32) -> Vec<(i32, String)> {
     let long = count > 62;
     (0..count)
         .filter_map(|offset| {