Fix broken helpdesk layout when satisfaction survey is expired

[cdbaq]

Checklist before requesting a review

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.
• This change requires a documentation update.

Description

• It fixes #<issue_number>

• This PR fixes a broken layout in the helpdesk/self-service interface when viewing closed tickets with an expired or external satisfaction survey.

  In some survey paths, timeline.html.twig opens a wrapper <div> and <form>, but itilsatisfaction.html.twig does not always close them because buttons.html.twig is not rendered in those cases.

  This leaves unclosed markup and causes .itil-right-side to be rendered inside .itil-left-side, breaking the expected two-column layout.

  The fix adds explicit closing tags in the survey paths where buttons.html.twig is not rendered:

  • external survey
  • expired survey with no answer
  • expired survey with an existing answer

Screenshots (if appropriate):

• Before: closed ticket layout breaks in helpdesk when the satisfaction survey is expired.
• After: .itil-right-side is rendered again as a sibling of .itil-left-side.