Rename author_email→contact_interne, author_show_contact→contact_public across view/controllers/templates

- v_theses_full: author_email→contact_interne, author_show_contact→contact_public
- Updated schema.sql and live DB view
- Renamed all PHP variables: currentAuthorEmail→contactInterne, currentAuthorShowContact→contactPublic
- Restored contact_interne backoffice field with proper wiring (takes precedence over mail field)
- Updated admin/add.php, admin/edit.php, partage/index.php, public/tfe.php templates

app/templates/admin/edit.php

@@ -7,7 +7,7 @@
         'titre'            => $thesis['title'],
         'subtitle'         => $thesis['subtitle'] ?? '',
         'auteurice'        => $thesis['authors'] ?? '',
-        'mail'             => $currentAuthorEmail ?? '',
+        'mail'             => $contactInterne ?? '',
         'synopsis'         => $thesis['synopsis'] ?? '',
         'tag'              => $thesis['keywords'] ?? '',
         'année'            => $thesis['year'],
@@ -15,7 +15,8 @@
         'ap'               => $thesis['ap_program'],
         'finality'         => $thesis['finality_type'],
         'lien'             => $thesis['baiu_link'] ?? '',
-        'contact_public'   => $currentAuthorShowContact ?? false,
+        'contact_public'   => $contactPublic ?? false,
+        'contact_interne'  => $contactInterne ?? '',
     ]);
     $oldFn = fn(string $key, string $default = '') =>
         isset($editFormData[$key]) && !is_array($editFormData[$key])