Only zero is empty, and the last day is worth reading

plugins/printers/frontend/views/TonerForecast.vue

@@ -293,11 +293,32 @@ function barWidth(cartridge) {
   return Math.max(0, Math.min(100, level)) + '%'
 }
 
+// daysleft is fractional, so the last day of a cartridge's life is readable
+// instead of collapsing to "empty". Only an actual zero is empty; anything above
+// it has time left and the row says how much, in whatever unit carries meaning.
+const HOURS_PER_DAY = 24
+const MINUTES_PER_HOUR = 60
+
 function daysText(cartridge) {
-  if (cartridge.daysleft == null) return '-'
-  if (cartridge.daysleft === 0) return 'empty'
-  if (cartridge.daysleft === 1) return '1 day'
-  return cartridge.daysleft + ' days'
+  const days = cartridge.daysleft
+  if (days == null) return '-'
+  if (days <= 0) return 'empty'
+
+  if (days < 1) {
+    const hours = days * HOURS_PER_DAY
+    // Under an hour, hours would round to 0 and read as empty again.
+    if (hours < 1) {
+      const minutes = Math.max(1, Math.round(hours * MINUTES_PER_HOUR))
+      return `${minutes} min`
+    }
+    const rounded = Math.round(hours)
+    return rounded === 1 ? '1 hour' : `${rounded} hours`
+  }
+
+  // Whole days from here. The estimate is not precise enough for "3.7 days" to
+  // mean more than "about 4", and a column of decimals is harder to scan.
+  const rounded = Math.round(days)
+  return rounded === 1 ? '1 day' : `${rounded} days`
 }
 
 function orderKey(item) {