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/en.ts

@@ -799,16 +799,13 @@ export const en = {
     },
     help: {
       trigger: "Help and support",
-      troubleshoot: "Troubleshoot",
+      sectionHelp: "Help",
       diagnostics: "Run diagnostics",
-      diagnosticsDescription: "Collect app and connected host details",
       shortcuts: "Keyboard shortcuts",
-      shortcutsDescription: "View available keyboard shortcuts",
       reportIssue: "Report an issue",
       discord: "Discord",
-      discordDescription: "Best for quick help and discussion",
       github: "Create GitHub issue",
-      githubDescription: "Report a reproducible bug",
+      whatsNew: "What's new",
       version: "Paseo {{version}}",
     },
     sections: {