Add finished Series filter; clock-driven hygiene predicates exclude it (#159)

backend/internal/web/admin_overview.go

@@ -59,7 +59,7 @@ type siteRow struct {
 }
 
 // overviewView assembles the landing page from the store's read model: one
-// SeriesShapes pass per filter summed in Go (the shipped surface offers eight
+// SeriesShapes pass per filter summed in Go (the shipped surface offers nine
 // grouped passes, not a stats query — #140), the pass log's latest pass per
 // Site, and the roster. A failure in any read is a 500 with a logged reason,
 // never a page of silent zeroes.
@@ -93,8 +93,10 @@ func (h *Handler) overviewView() (overviewView, error) {
 	view.Unchecked = totals[store.SeriesFilterStale] + totals[store.SeriesFilterNeverChecked]
 	view.Verdict, view.HasCounts = overviewVerdict(passes, now)
 
-	// The seven problem filters, in seriesFilterOrder's permanent-then-fixable
-	// order; the All filter's count belongs to the Library block, not to a
+	// The hygiene figures, in seriesFilterOrder's tail: the seven problem
+	// filters in permanent-then-fixable order, then the finished figure last —
+	// informational, not a problem, and last because seriesFilterOrder appends
+	// it there. The All filter's count belongs to the Library block, not to a
 	// "hygiene" figure.
 	hygiene := make([]fig, 0, len(seriesFilterOrder)-1)
 	for _, name := range seriesFilterOrder[1:] {