feat(frontend): analytics panel and online statuses speak russian and english with real plurals

frontend/src/lib/components/presence/PresenceSessions.svelte

@@ -5,6 +5,7 @@
   import Spinner from "#lib/components/ui/Spinner.svelte";
   import { formatLongDay, formatTime } from "#lib/format/datetime.js";
   import { formatSpan } from "#lib/format/presence.js";
+  import { t } from "#lib/i18n/locale.svelte.js";
 
   interface Props {
     days: number;
@@ -16,18 +17,6 @@
 
   const { days, first, pageSize, peerId, tz }: Props = $props();
 
-  const TEXT = {
-    failed: "Не удалось загрузить сессии.",
-    more: "Показать ещё",
-    none: "За этот период в сети не был(а).",
-    now: "в сети",
-    retry: "Повторить",
-    since: (time: string) => `с ${time}`,
-    span: (from: string, to: string) => (from === to ? from : `${from}–${to}`),
-    today: "Сегодня",
-    yesterday: "Вчера",
-  };
-
   const MS_IN_DAY = 86_400_000;
 
   let extra = $state<PresenceSession[]>([]);
@@ -54,18 +43,22 @@
   function dayLabel(date: Date): string {
     const today = new Date();
     if (date.toDateString() === today.toDateString()) {
-      return TEXT.today;
+      return t("presence.today");
     }
     if (
       date.toDateString() ===
       new Date(today.getTime() - MS_IN_DAY).toDateString()
     ) {
-      return TEXT.yesterday;
+      return t("presence.yesterday");
     }
     const text = formatLongDay(date);
     return text.charAt(0).toUpperCase() + text.slice(1);
   }
 
+  function span(from: string, to: string): string {
+    return from === to ? from : `${from}–${to}`;
+  }
+
   async function loadMore() {
     if (loading) {
       return;
@@ -92,7 +85,7 @@
 </script>
 
 {#if sessions.length === 0}
-  <p class="state">{TEXT.none}</p>
+  <p class="state">{t("presence.noSessions")}</p>
 {:else}
   {#each groups as group (group.label)}
     <h4 class="day">{group.label}</h4>
@@ -101,14 +94,13 @@
         <li>
           <span>
             {session.ongoing
-              ? TEXT.since(formatTime(session.started))
-              : TEXT.span(
-                  formatTime(session.started),
-                  formatTime(session.ended)
-                )}
+              ? t("presence.since", { time: formatTime(session.started) })
+              : span(formatTime(session.started), formatTime(session.ended))}
           </span>
           <span class={["length", { online: session.ongoing }]}>
-            {session.ongoing ? TEXT.now : formatSpan(session.seconds)}
+            {session.ongoing
+              ? t("presence.online")
+              : formatSpan(session.seconds)}
           </span>
         </li>
       {/each}
@@ -118,11 +110,13 @@
     <div class="state"><Spinner /></div>
   {:else if failed}
     <div class="state">
-      <p>{TEXT.failed}</p>
-      <Button onclick={loadMore} smaller variant="text">{TEXT.retry}</Button>
+      <p>{t("presence.sessionsFailed")}</p>
+      <Button onclick={loadMore} smaller variant="text">{t("ui.retry")}</Button>
     </div>
   {:else if !exhausted}
-    <button class="more" onclick={loadMore} type="button">{TEXT.more}</button>
+    <button class="more" onclick={loadMore} type="button">
+      {t("ui.showMore")}
+    </button>
   {/if}
 {/if}