fix: display db timestamps in Brussels time

(heure de dépôt was showing UTC)

- feat: add date_depot column (real TFE deposit date)
with CSV round-trip + Brussels→UTC sanitization
- fix: keep PHP default tz at UTC to preserve token/share-link
 expiry consistency; convert to Brussels only in db_datetime()

app/src/Controllers/ExportController.php

@@ -290,6 +290,7 @@ class ExportController
         ['Licence personnalisée',           'license_custom',      'licence-perso'],
         ['Contact visible',                  'contact_visible',     'contact-visible'],
         ['Objet',                            'objet',               'objet'],
+        ['Date de dépôt',                    'date_depot',          'dépôt'],
     ];
 
     /**
@@ -336,6 +337,7 @@ class ExportController
         'Licence personnalisée',
         'Contact visible',
         'Objet',
+        'Date de dépôt',
     ];
 
     /**
@@ -461,6 +463,7 @@ class ExportController
                 $t['license_custom']     ?? '',
                 $t['contact_visible']    ?? '',
                 $t['objet']              ?? '',
+                !empty($t['date_depot']) ? db_datetime((string)$t['date_depot'], 'd/m/Y H:i') : '',
             ];
         }
 

app/src/Database.php

@@ -2722,7 +2722,8 @@ class Database
                 t.duration_pages,
                 t.duration_minutes,
                 t.has_annexes,
-                t.objet
+                t.objet,
+                t.date_depot
             FROM theses t
             LEFT JOIN orientations    o  ON t.orientation_id  = o.id
             LEFT JOIN ap_programs     ap ON t.ap_program_id   = ap.id