Display tardiness average and sum

aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsTardinessCard.vue

@@ -8,9 +8,16 @@
       <div class="text-subtitle-2">
         {{ $tc("alsijil.personal_notes.tardiness_n", tardinessCount) }}
       </div>
-      <div class="text-subtitle-2">
+      <div class="text-caption">
         <!-- TODO: Show average tardiness instead of sum like mock-up? -->
-        {{ tardinessSum }}
+        <div>
+          <v-icon small>mdi-sigma</v-icon>
+          {{ $tc("time.minutes_n", tardinessSum) }}
+        </div>
+        <div>
+          <v-icon small>mdi-diameter-variant</v-icon>
+          {{ $tc("time.minutes_n", (tardinessSum / tardinessCount).toFixed(2)) }}
+        </div>
       </div>
     </v-card-text>
   </v-card>