CSV importer: boolean and ap variants/typos

- add AP aliases for:
  - Design & politique du multiple → DPM,
  - Pratiques artistiques & complexité scientifique → PACS,
  - Narraion Speculative typo → NS
- Fix: OUI/NON CSV artefacts in contact_interne — clean DB, guard in findOrCreateAuthor and CSV import
- Cleaned 141 authors.email = 'NON' rows → NULL in dev DB
- findOrCreateAuthor: treat OUI/NON as null (CSV boolean artefact in email column)
- CSV import: sanitize contact column — OUI/NON → empty string before passing to findOrCreateAuthor

app/src/Database.php

@@ -744,11 +744,11 @@ class Database
     }
 
     /**
-     * Get all languages
+     * Get all languages (name is capitalized for display).
      */
     public function getAllLanguages(): array
     {
-        $stmt = $this->pdo->query('SELECT * FROM languages ORDER BY name');
+        $stmt = $this->pdo->query("SELECT id, UPPER(SUBSTR(name,1,1)) || SUBSTR(name,2) as name, created_at FROM languages ORDER BY name");
         return $stmt->fetchAll();
     }
 
@@ -954,6 +954,11 @@ class Database
      */
     public function findOrCreateAuthor($name, $email = null, bool $showContact = false)
     {
+        // Normalise CSV artefacts: OUI/NON strings in email column → null
+        if ($email !== null && in_array(strtoupper(trim($email)), ['NON', 'OUI'], true)) {
+            $email = null;
+        }
+
         $stmt = $this->pdo->prepare('SELECT id FROM authors WHERE name = ?');
         $stmt->execute([$name]);
         $author = $stmt->fetch();
@@ -1522,11 +1527,11 @@ class Database
 
     /**
      * Return the ID of an existing language by name, inserting it if absent.
-     * Name is trimmed and stored as-is (case-preserved).
+     * Name is stored lowercase and displayed with first letter capitalized.
      */
     public function getOrCreateLanguage(string $name): int
     {
-        $name = trim($name);
+        $name = strtolower(trim($name));
         $stmt = $this->pdo->prepare('SELECT id FROM languages WHERE LOWER(name) = LOWER(?) LIMIT 1');
         $stmt->execute([$name]);
         $id = $stmt->fetchColumn();