Fix edit form: is_published reset, contact decoupling, note label, author name case

- Fix #1: Add is_published to getThesisRawFields() SELECT so the publish
  checkbox stays checked when editing an already-published TFE.
- Fix #2: Rename 'Note contextuelle' → 'Note contextuelle relative à
  soutenance' in all templates and StudentEmail.
- Fix #3: Update findOrCreateAuthor to also UPDATE the author name when
  a record is found by name (fixes inability to capitalise names).
- Fix #4/#5: Decouple contact_interne (private author email) from
  contact_visible (public contact on TFE page). Add migration 037 to
  add contact_visible TEXT column to theses table and rebuild
  v_theses_full view. Update all controllers, templates, and DB methods
  to treat them independently.
- Fix #6: Investigated libre→interne restriction — no code barrier
  found; likely resolved by is_published fix.

app/templates/partials/form/fieldset-tfe-info.php

@@ -58,12 +58,14 @@ $adminMode       = $adminMode       ?? false;
     $hint = 'Séparez les auteur·ices par des virgules.';
     include APP_ROOT . '/templates/partials/form/text-field.php';
     ?>
+    <?php if (!$adminMode): ?>
     <?php
     $name = 'mail'; $label = 'Contact visible (optionnel) [mail/site/insta/etc.] :'; $value = $oldFn('mail');
     $attrs = ['autocomplete' => 'email'];
     $hint = 'Un seul contact. Indiquez l\'URL complète pour un site (https://…), l\'adresse mail, le nom d\'utilisateur avec @ pour Instagram (@pseudo), ou l\'adresse complète pour Mastodon (@pseudo@instance). Ce contact sera visible publiquement sur la fiche du TFE.';
     include APP_ROOT . '/templates/partials/form/text-field.php';
     ?>
+    <?php endif; ?>
 
     <div>
         <label for="synopsis">Synopsis :<?= $adminMode ? '' : ' <span class="asterisk">*</span>' ?></label>