feat(manage): DisplayState in ManageUI-Template-Daten

server/backend/internal/httpapi/manage/ui.go

@@ -380,6 +380,8 @@ func HandleManageUI(
 		// M6: CSRF-Token an Template-Daten weitergeben.
 		csrfToken := setCSRFCookie(w, r, cfg.DevMode)
 
+		displayState, _ := screens.GetDisplayState(r.Context(), screen.ID)
+
 		// Determine back-navigation based on ?from= query parameter.
 		backLink := "/admin"
 		backLabel := "← Admin"
@@ -431,6 +433,7 @@ func HandleManageUI(
 			"AccessibleScreens": accessibleScreens,
 			"ServerTimezone":    serverTimezone,
 			"CSRFToken":         csrfToken,
+			"DisplayState":      displayState,
 		})
 	}
 }