/reg is broken

cmd/clitest/main.go

@@ -115,6 +115,15 @@ func main() {
 			if r.URL.Query().Get("bpi") != "" {
 				register = register.WithBPIs(bpis)
 			}
+			if zoomStart, err := time.ParseInLocation("2006-01", r.URL.Query().Get("zoomStart"), time.Local); err == nil {
+				result := make(ledger.Register)
+				for d := range register {
+					if d >= zoomStart.Format("2006-01") {
+						result[d] = register[d]
+					}
+				}
+				register = result
+			}
 			// /MODIFIERS
 
 			nameCurrencyDateValue := map[string]map[ledger.Currency]map[string]float64{}