fix: use getThesis() instead of getThesisById() in share recap page

getThesisById() filters by is_published=1, but theses submitted
via share links are unpublished. The recap page after submission
was showing 'TFE introuvable' because it couldn't find the
just-created unpublished thesis.

app/public/partage/recapitulatif.php

@@ -18,8 +18,8 @@ if ($thesisId <= 0) {
 }
 
 $db     = Database::getInstance();
-// Only published theses are visible via public recap (no slug-auth here).
+// Share-link theses may be unpublished; use getThesis() without published filter.
-$thesis = $db->getThesisById($thesisId);
+$thesis = $db->getThesis($thesisId);
 if (!$thesis) {
     http_response_code(404);
     die('TFE introuvable.');