feat(admin): humanise les libelles restants (Reference, Variation, Auteur)

- Categories : 'Slug' -> 'Reference' (en-tete liste + label form + 3 messages de
  validation alignes dans CategoryController).
- Mouvements de stock : 'Delta' -> 'Variation', 'Acteur' -> 'Auteur'.
Tests CategoryController/IngredientController mis a jour. PHPUnit 301 + PHPStan L6 verts.

src/app/Controllers/CategoryController.php

@@ -197,9 +197,9 @@ class CategoryController extends AdminController
         }
 
         if ($slug === '' || mb_strlen($slug) > 60 || preg_match('/^[a-z0-9]+(?:-[a-z0-9]+)*$/', $slug) !== 1) {
-            $errors['slug'] = 'Slug requis : minuscules, chiffres et tirets (60 max).';
+            $errors['slug'] = 'Reference requise : minuscules, chiffres et tirets (60 max).';
         } elseif ($repo->slugExists($slug, $exceptId)) {
-            $errors['slug'] = 'Ce slug existe deja.';
+            $errors['slug'] = 'Cette reference existe deja.';
         }
 
         if ($image !== '' && mb_strlen($image) > 255) {
@@ -258,7 +258,7 @@ class CategoryController extends AdminController
         // getCode() rend la chaine SQLSTATE pour une vraie PDOException ; le cast
         // couvre aussi un code entier (23000 = violation de contrainte d'integrite).
         if ((string) $exception->getCode() === '23000') {
-            return $this->renderForm($guard, $id, $form, ['slug' => 'Ce libelle ou ce slug existe deja.'], 409);
+            return $this->renderForm($guard, $id, $form, ['slug' => 'Ce libelle ou cette reference existe deja.'], 409);
         }
 
         throw $exception;

src/app/Views/admin/categories/form.php

@@ -40,7 +40,7 @@ $err = static fn (string $k): string => isset($errs[$k]) && is_string($errs[$k])
     </div>
 
     <div class="form-group">
-        <label class="form-label" for="slug">Slug</label>
+        <label class="form-label" for="slug">Reference</label>
         <input class="form-input" type="text" id="slug" name="slug" maxlength="60" value="<?= $val('slug') ?>" required>
         <?php if ($err('slug') !== ''): ?><p class="form-error"><?= htmlspecialchars($err('slug'), ENT_QUOTES, 'UTF-8') ?></p><?php endif; ?>
     </div>

src/app/Views/admin/categories/index.php

@@ -32,7 +32,7 @@ $esc = static fn (mixed $v): string => htmlspecialchars((string) $v, ENT_QUOTES,
             <thead>
                 <tr>
                     <th>Libelle</th>
-                    <th>Slug</th>
+                    <th>Reference</th>
                     <th>Ordre</th>
                     <th>Statut</th>
                     <th style="width:160px;"></th>

src/app/Views/admin/ingredients/movements.php

@@ -49,9 +49,9 @@ $colspan = $withActor ? 5 : 4;
                 <tr>
                     <th>Date</th>
                     <th>Type</th>
-                    <th>Delta</th>
+                    <th>Variation</th>
                     <th>Note</th>
-                    <?php if ($withActor): ?><th>Acteur</th><?php endif; ?>
+                    <?php if ($withActor): ?><th>Auteur</th><?php endif; ?>
                 </tr>
             </thead>
             <tbody>

tests/Unit/Admin/CategoryControllerTest.php

@@ -202,7 +202,7 @@ final class CategoryControllerTest extends TestCase
 
         self::assertSame(422, $response->status());
         self::assertStringContainsString('Le libelle est requis', $response->body());
-        self::assertStringContainsString('Slug requis', $response->body());
+        self::assertStringContainsString('Reference requise', $response->body());
         self::assertFalse($this->wroteContaining($db, 'INSERT INTO category'));
     }
 
@@ -266,7 +266,7 @@ final class CategoryControllerTest extends TestCase
         $response = $this->controller($request, $db)->store();
 
         self::assertSame(422, $response->status());
-        self::assertStringContainsString('Ce slug existe deja', $response->body());
+        self::assertStringContainsString('Cette reference existe deja', $response->body());
         self::assertFalse($this->wroteContaining($db, 'INSERT INTO category'));
     }
 

tests/Unit/Admin/IngredientControllerTest.php

@@ -425,7 +425,7 @@ final class IngredientControllerTest extends TestCase
         $response = $this->controller($this->get('/admin/ingredients/5/movements'), $db)->movements(['id' => '5']);
 
         self::assertSame(200, $response->status());
-        self::assertStringContainsString('Acteur', $response->body());
+        self::assertStringContainsString('Auteur', $response->body());
         self::assertStringContainsString('Sam K', $response->body()); // nom resolu
     }
 
@@ -438,6 +438,6 @@ final class IngredientControllerTest extends TestCase
         $response = $this->controller($this->get('/admin/ingredients/5/movements'), $db)->movements(['id' => '5']);
 
         self::assertSame(200, $response->status());
-        self::assertStringNotContainsString('Acteur', $response->body()); // colonne masquee (RG-4)
+        self::assertStringNotContainsString('Auteur', $response->body()); // colonne masquee (RG-4)
     }
 }