Translations and CHANGELOG for the redesign, the agent's link and Scheduled

51 sentences of the app's own in all eight languages (gen-i18n.py OWN), the rest from the
server's catalogues; 11 sentences no page uses any more are gone. The title bar's pills stay
inside its height at touch sizes; a failed scheduled run has its own notification words.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ui/js/main.js

@@ -330,7 +330,7 @@ async function boot() {
     }
   })
 
-  invoke("set_words", { words: { reply: t("The reply is ready."), agent: t("The agent has finished."), scheduled: t("A scheduled task has a result.") } })
+  invoke("set_words", { words: { reply: t("The reply is ready."), agent: t("The agent has finished."), scheduled: t("A scheduled task has a result."), scheduled_failed: t("A scheduled task failed.") } })
   listen("status", (e) => {
     const before = status
     status = e.payload