Add CM1 and CM2 boards, six backdrops and a quit button (0.8.0)

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

tests/data/test_elision.gd

@@ -8,6 +8,8 @@ const DATA_DIR := "res://data"
 ## Mots a « h » aspire ou vocalique sans elision : « le hibou », « le onze ».
 const NO_ELISION_WORDS: Array[String] = [
     "hibou",
+    "hublot",
+    "hublots",
     "haie",
     "haies",
     "héros",

tests/exercises/test_exercise_engine.gd

@@ -15,7 +15,7 @@ func test_unknown_rule_returns_empty_dictionary() -> void:
 
 func test_missions_are_loaded_and_sorted() -> void:
     var missions := ExerciseEngine.get_missions()
-    assert_eq(missions.size(), 57)
+    assert_eq(missions.size(), 111)
     var ids: Array = missions.map(func(m: Dictionary) -> String: return m["mission_id"])
     assert_eq(ids, ids.duplicate())  # trivialement vrai, documente l'ordre stable
     assert_true(ids.has("mission_01_pre_des_mots"))
@@ -26,7 +26,8 @@ func test_missions_are_loaded_and_sorted() -> void:
 func test_missions_are_filtered_by_the_level_of_their_rule() -> void:
     assert_eq(ExerciseEngine.get_missions_for_level("CE1").size(), 27)
     assert_eq(ExerciseEngine.get_missions_for_level("CE2").size(), 30)
-    assert_eq(ExerciseEngine.get_missions_for_level("CM1").size(), 0)
+    assert_eq(ExerciseEngine.get_missions_for_level("CM1").size(), 27)
+    assert_eq(ExerciseEngine.get_missions_for_level("CM2").size(), 27)
 
 
 func test_regions_are_ordered_and_hold_their_missions() -> void:

tests/world/test_settings_scenes.gd

@@ -86,3 +86,23 @@ func test_profile_creation_offers_only_levels_that_have_content() -> void:
             expected.append(level)
     assert_eq(offered, expected)
     assert_true(offered.has("CE1") and offered.has("CE2"))
+
+
+func test_quit_button_asks_for_confirmation_then_quits_through_the_hook() -> void:
+    var quits: Array[int] = []
+    GameManager.quit_hook = func() -> void: quits.append(1)
+    for path in ["res://scenes/profiles/profile_select.tscn", "res://scenes/ui/settings.tscn"]:
+        var scene: Control = add_child_autofree(load(path).instantiate())
+        await wait_process_frames(1)
+        var button: Button = scene.get_node("%QuitButton")
+        var dialog: ConfirmationDialog = scene.get_node("%QuitDialog")
+        assert_eq(button.text, UIText.get_text("quit.button"))
+        var before_press := quits.size()
+        button.pressed.emit()
+        assert_true(dialog.visible, "une confirmation doit etre demandee")
+        assert_eq(quits.size(), before_press, "rien ne quitte avant la confirmation")
+        var before := quits.size()
+        dialog.hide()
+        dialog.confirmed.emit()
+        assert_eq(quits.size(), before + 1)
+    GameManager.quit_hook = Callable()