Add average column to results table

wwwroot/js/i18n.js

@@ -89,6 +89,7 @@ const translations = {
     "results.rank": "Rank",
     "results.game": "Game",
     "results.author": "Author",
+    "results.average": "Avg",
     "results.votesList": "All votes",
     "results.myVote": "Your vote",
     "results.links": "Links",
@@ -217,6 +218,7 @@ const translations = {
     "results.rank": "Rang",
     "results.game": "Spiel",
     "results.author": "Autor",
+    "results.average": "Ø",
     "results.votesList": "Alle Stimmen",
     "results.myVote": "Deine Stimme",
     "results.links": "Links",

wwwroot/js/ui.js

@@ -225,6 +225,7 @@ export function renderResults() {
         <th>${t("results.rank")}</th>
         <th>${t("results.game")}</th>
         <th>${t("results.author")}</th>
+        <th>${t("results.average")}</th>
         <th>${t("results.votesList")}</th>
         <th>${t("results.myVote")}</th>
         <th>${t("results.links")}</th>
@@ -248,6 +249,7 @@ export function renderResults() {
          </div>
       </td>
       <td class="author-cell">${r.author ?? "—"}</td>
+      <td>${r.average?.toFixed ? r.average.toFixed(1) : r.average}</td>
       <td>${formatVotes(r.votes)}</td>
       <td>${formatMyVote(r.myVote)}</td>
       <td>