Badges : texte libre saisi dans l'éditeur, champs ramenés dans le badge

Texte libre commun à tous les badges, saisi dans l'éditeur
(BadgeField.text, migration 0025) ; le « Texte du badge » de la fiche le
remplace pour un bénévole. Champs ramenés à l'intérieur du badge et champ
sélectionné au premier plan : la photo restait bloquée hors d'un badge
plus étroit que le CR80 (bornes de glisser-déposer négatives).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/tests/test_badges_api.py

@@ -221,12 +221,15 @@ def test_generating_with_photo_and_free_text_fields(client, edition, session):
                 {
                     "field_type": "FREE_TEXT", "x_mm": 5, "y_mm": 40,
                     "width_mm": 50, "height_mm": 8, "font_size": 9,
+                    "text": "Staff 2026",
                 },
             ]
         },
     )
     assert resp.status_code == 200
-    assert {f["field_type"] for f in resp.json()} == {"PHOTO", "FREE_TEXT"}
+    by_type = {f["field_type"]: f for f in resp.json()}
+    assert set(by_type) == {"PHOTO", "FREE_TEXT"}
+    assert by_type["FREE_TEXT"]["text"] == "Staff 2026"
 
     with_photo = make_volunteer(session, edition, first_name="Alex", last_name="Martin")
     with_photo.photo = _PNG

backend/tests/test_badges_fields.py

@@ -111,3 +111,16 @@ def test_field_text_free_text_is_the_volunteer_badge_text():
 
     assert _field_text(field, with_text, {}, set()) == "Accès backstage"
     assert _field_text(field, without, {}, set()) == ""
+
+
+def test_field_text_free_text_falls_back_to_the_common_editor_text():
+    field = BadgeField(
+        edition_id=uuid.uuid4(), field_type=BadgeFieldType.FREE_TEXT,
+        x_mm=0, y_mm=0, width_mm=10, height_mm=10, font_size=8, color="#000000",
+        text="Staff 2026",
+    )
+    own = _volunteer(first_name="Alex", last_name="Martin", badge_text="Accès backstage")
+    other = _volunteer(first_name="Sam", last_name="Nuit")
+
+    assert _field_text(field, own, {}, set()) == "Accès backstage"
+    assert _field_text(field, other, {}, set()) == "Staff 2026"