Polish release notes and in-app help (#2070)

* feat(ui): improve changelog and help navigation

Make release notes easier to scan and reach from the app. Also keep the homepage marquee within the layout viewport so it cannot create horizontal scrolling.

* fix(website): reject duplicate release anchors

packages/app/src/i18n/resources/fr.ts

@@ -818,16 +818,13 @@ export const fr: TranslationResources = {
     },
     help: {
       trigger: "Aide et assistance",
-      troubleshoot: "Dépannage",
+      sectionHelp: "Aide",
       diagnostics: "Lancer le diagnostic",
-      diagnosticsDescription: "Collecter les détails de l’app et des hôtes connectés",
       shortcuts: "Raccourcis clavier",
-      shortcutsDescription: "Afficher les raccourcis clavier disponibles",
       reportIssue: "Signaler un problème",
       discord: "Discord",
-      discordDescription: "Idéal pour obtenir une aide rapide et échanger",
       github: "Créer un ticket GitHub",
-      githubDescription: "Signaler un bug reproductible",
+      whatsNew: "Nouveautés",
       version: "Paseo {{version}}",
     },
     sections: {