fix(ui): move widget and page documentation into headings

Verified with the coordinated workspace changes by devkit full run
2026-09-08T225814-186389-0000-3e3ed7cd (all seven phases passed).
This shared UI pass does not mark the individual module reviews complete.

webui/src/i18n/generatedTranslations.ts

@@ -1,5 +1,6 @@
 export const generatedTranslations = {
   en: {
+    "Scheduling": "Scheduling",
     "i18n:govoplan-scheduling.self_enrollment.access": "Open self-enrollment",
     "i18n:govoplan-scheduling.self_enrollment.bind_account": "Bind this enrollment to my signed-in account",
     "i18n:govoplan-scheduling.self_enrollment.bind_help": "Account binding requires confirmation and lets you manage this response from Scheduling.",
@@ -219,6 +220,7 @@ export const generatedTranslations = {
     "i18n:govoplan-scheduling.your_response_has_been_recorded.b855088d": "Your response has been recorded."
   },
   de: {
+    "Scheduling": "Terminplanung",
     "i18n:govoplan-scheduling.self_enrollment.access": "Selbstanmeldung öffnen",
     "i18n:govoplan-scheduling.self_enrollment.bind_account": "Diese Anmeldung mit meinem angemeldeten Konto verknüpfen",
     "i18n:govoplan-scheduling.self_enrollment.bind_help": "Die Kontoverknüpfung muss bestätigt werden und ermöglicht die Verwaltung dieser Antwort in der Terminplanung.",