Let Texte/Titre elements bind directly to a single row of another object

Adds a "Donnée liée" settings group to Texte/Titre: pick an object, optionally match it to the current game state via 1-2 filter conditions (same engine as the data-repeater's filter, including {{Objet.champ}} cross-references), and use {{champ}} in the text content to show a field from that one matching row. Unlike the data repeater — built for showing a list of rows — this covers displaying a single computed value (e.g. the objective of the level matching the game's current parcours/level) without wrapping it in a repeater.

screens/widgets/registry.py

@@ -8,6 +8,7 @@ from .controls.c_toggle_token import c_toggle_token
 from .controls.c_align import c_align
 from .controls.c_select import c_select
 from .control_groups.text_style_controls_extra import TEXT_STYLE_CONTROLS_EXTRA
+from .control_groups.data_binding_controls import DATA_BINDING_CONTROLS
 from .font_options import FONT_OPTIONS
 from ..flow.constants import CONDITION_OPERATORS
 
@@ -16,7 +17,8 @@ WIDGETS = {
         "label": "Texte", "icon": "📝", "tag": "p", "has_content": True,
         "w": 40, "h": 10, "default_content": "Texte du paragraphe.",
         "controls": [
-            c_textarea("content", "Texte", "content", default="Texte du paragraphe.", group="Contenu"),
+            c_textarea("content", "Texte — {{champ}} affiche la valeur de ce champ sur la ligne trouvée ci-dessous", "content", default="Texte du paragraphe.", group="Contenu"),
+        ] + DATA_BINDING_CONTROLS + [
             c_slider("font-size", "Taille du texte", "style:font-size", min=10, max=64, default=16, group="Texte"),
             c_color("color", "Couleur du texte", "style:color", "#e8eaf0", group="Texte"),
             c_align("text-align", "Alignement", "style:text-align", group="Texte"),
@@ -30,9 +32,10 @@ WIDGETS = {
         "label": "Titre", "icon": "🔠", "tag": None, "has_content": True,
         "w": 55, "h": 10, "default_content": "Titre",
         "controls": [
-            c_textarea("content", "Texte", "content", default="Titre", group="Contenu"),
+            c_textarea("content", "Texte — {{champ}} affiche la valeur de ce champ sur la ligne trouvée ci-dessous", "content", default="Titre", group="Contenu"),
             c_select("niveau", "Importance du titre", "attr:_niveau",
                      [("1", "Très grand — titre principal"), ("2", "Grand"), ("3", "Moyen")], default="2", group="Contenu"),
+        ] + DATA_BINDING_CONTROLS + [
             c_slider("font-size", "Taille du texte", "style:font-size", min=14, max=80, default=32, group="Texte"),
             c_color("color", "Couleur du texte", "style:color", "#e8eaf0", group="Texte"),
             c_align("text-align", "Alignement", "style:text-align", default="left", group="Texte"),