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/public/tfe.php

@@ -185,16 +185,16 @@
 
                 <?php if (!empty($data["context_note"])): ?>
                 <p class="tfe-meta-item tfe-meta-note">
-                    <span class="tfe-meta-label">Note :</span>
+                    <span class="tfe-meta-label">Note contextuelle relative à soutenance :</span>
                     <span class="tfe-note-value"><?= nl2br(htmlspecialchars($data["context_note"])) ?></span>
                 </p>
                 <?php endif; ?>
 
-                <?php if (!empty($data["contact_interne"]) && !empty($data["contact_public"])): ?>
+                <?php if (!empty($data["contact_visible"])): ?>
                 <p class="tfe-meta-item">
                     <span class="tfe-meta-label">Contact :</span>
                         <?php
-                        $_contact = $data["contact_interne"];
+                        $_contact = $data["contact_visible"];
                         $_isUrl = filter_var($_contact, FILTER_VALIDATE_URL) !== false;
                         $_isEmail = !$_isUrl && str_contains($_contact, "@");
                         if ($_isUrl):