Visual overhaul: theme, illustrations, redesigned screens (0.3.0)

Phase "habillage" of the post-0.1.0 plan. Rendering was reviewed on real
screenshots (new tools/screenshot.gd, `make screenshot`), which also
caught and fixed map markers overlapping and truncated titles.

- Global Godot theme (Atkinson Hyperlegible font, cream/green/gold
  palette, raised buttons, rounded cards, thick keyboard focus).
- Original vector art: forest/marsh backdrops, Plume the owl, stars,
  exercise-type icons, correct/try-again icons, 10 collection items.
- Redesigned world map (markers as cards with icon, title and stars,
  responsive layout), profile screens, mission intro, exercise host,
  rule/feedback panels, reward screen and collection grid.
- Motion helper (pop-in, fade) honouring an animations setting.
- Settings: animations flag; base window 1152x648 with canvas_items.

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

scenes/world/world_map.gd

@@ -3,20 +3,22 @@ extends Control
 ## (cahier des charges §15) se limitait a trois lieux ; le perimetre a ete
 ## etendu (docs/specs/decisions.md, points 25 et 27). La position de chaque
 ## mission vient de data/missions/*.json (fractions 0..1 de la zone de
-## carte), jamais d'une position fixe en dur dans le script. Un profil CE2
-## peut basculer sur la carte CE1 pour revoir les notions precedentes.
+## carte), jamais d'une position fixe en dur dans le script : chaque lieu est
+## replace quand la zone change de taille. Un profil CE2 peut basculer sur la
+## carte CE1 pour revoir les notions precedentes.
 
-const MARKER_HALF_WIDTH := 80.0
-const MARKER_HALF_HEIGHT := 48.0
+const MARKER_SCENE := preload("res://scenes/world/mission_marker.tscn")
 
 var _viewed_level := "CE1"
 
+@onready var _backdrop: Control = %Backdrop
 @onready var _title_label: Label = %TitleLabel
 @onready var _map_area: Control = %MapArea
 @onready var _level_toggle_button: Button = %LevelToggleButton
 @onready var _total_stars_label: Label = %TotalStarsLabel
 @onready var _collection_button: Button = %CollectionButton
 @onready var _profile_button: Button = %ProfileButton
+@onready var _guide: Control = %Guide
 
 
 func _ready() -> void:
@@ -27,19 +29,19 @@ func _ready() -> void:
     _collection_button.pressed.connect(_on_collection_pressed)
     _profile_button.text = UIText.get_text("world_map.change_profile_button")
     _profile_button.pressed.connect(_on_change_profile_pressed)
+    _map_area.resized.connect(_layout_markers)
+    _guide.say(UIText.get_text("world_map.guide_hint"))
     _refresh()
 
 
 func _refresh() -> void:
-    var title_key := "world_map.title_ce2" if _viewed_level == "CE2" else "world_map.title"
-    _title_label.text = UIText.get_text(title_key)
-    var toggle_key := (
-        "world_map.review_ce1_button" if _viewed_level == "CE2" else "world_map.back_to_ce2_button"
-    )
-    _level_toggle_button.text = UIText.get_text(toggle_key)
-    _total_stars_label.text = (
-        "%s %d" % [UIText.get_text("world_map.total_stars_label"), ProgressManager.stars()]
+    var is_ce2 := _viewed_level == "CE2"
+    _backdrop.kind = "marsh" if is_ce2 else "forest"
+    _title_label.text = UIText.get_text("world_map.title_ce2" if is_ce2 else "world_map.title")
+    _level_toggle_button.text = UIText.get_text(
+        "world_map.review_ce1_button" if is_ce2 else "world_map.back_to_ce2_button"
     )
+    _total_stars_label.text = str(ProgressManager.stars())
     _populate_missions()
 
 
@@ -48,8 +50,64 @@ func _populate_missions() -> void:
         _map_area.remove_child(child)
         child.queue_free()
 
+    var index := 0
     for mission: Dictionary in ExerciseEngine.get_missions_for_level(_viewed_level):
-        _map_area.add_child(_build_marker(mission))
+        var marker: Button = MARKER_SCENE.instantiate()
+        _map_area.add_child(marker)
+        marker.set_meta("map_position", mission["map_position"])
+        marker.setup(
+            mission,
+            ProgressManager.mission_best_stars(mission["mission_id"]),
+            MissionScoring.MAX_STARS,
+            _status_label_for(mission)
+        )
+        marker.pressed.connect(_on_mission_pressed.bind(mission["mission_id"]))
+        Motion.pop_in(marker, 0.04 * index)
+        index += 1
+    _layout_markers()
+
+
+## Replace chaque lieu selon sa position fractionnelle. Les positions du
+## niveau affiche sont etalees sur toute la zone (la plus petite colle au
+## bord, la plus grande au bord oppose) : les lieux restent entierement
+## visibles et ne se chevauchent pas, quelle que soit la taille de la fenetre.
+func _layout_markers() -> void:
+    var markers: Array[Control] = []
+    var low := Vector2(INF, INF)
+    var high := Vector2(-INF, -INF)
+    for child in _map_area.get_children():
+        var control := child as Control
+        if control == null or not control.has_meta("map_position"):
+            continue
+        var fraction: Dictionary = control.get_meta("map_position")
+        var point := Vector2(float(fraction["x"]), float(fraction["y"]))
+        low = Vector2(minf(low.x, point.x), minf(low.y, point.y))
+        high = Vector2(maxf(high.x, point.x), maxf(high.y, point.y))
+        markers.append(control)
+
+    for control in markers:
+        var fraction: Dictionary = control.get_meta("map_position")
+        var free_space := _map_area.size - control.size
+        control.position = Vector2(
+            _spread(float(fraction["x"]), low.x, high.x) * maxf(free_space.x, 0.0),
+            _spread(float(fraction["y"]), low.y, high.y) * maxf(free_space.y, 0.0)
+        )
+
+
+func _spread(value: float, low: float, high: float) -> float:
+    if high - low < 0.0001:
+        return 0.5
+    return (value - low) / (high - low)
+
+
+func _status_label_for(mission: Dictionary) -> String:
+    var rule: Dictionary = ExerciseEngine.get_rule(mission["rule_id"])
+    var skill_id: String = rule.get("skill", "")
+    var skill_state := ProgressManager.get_skill_state(skill_id)
+    var status: String = skill_state["status"]
+    if status == "decouverte":
+        return ""
+    return UIText.get_text("world_map.status_%s" % status)
 
 
 ## Revient au choix du profil sans rien perdre : la progression est ecrite
@@ -68,44 +126,6 @@ func _on_level_toggle_pressed() -> void:
     _refresh()
 
 
-func _build_marker(mission: Dictionary) -> Control:
-    var button := Button.new()
-    button.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-    button.text = (
-        "%s\n%s\n%s %d/%d"
-        % [
-            mission["title"],
-            _status_label_for(mission),
-            UIText.get_text("world_map.mission_stars_label"),
-            ProgressManager.mission_best_stars(mission["mission_id"]),
-            MissionScoring.MAX_STARS,
-        ]
-    )
-
-    var map_position: Dictionary = mission["map_position"]
-    var x: float = map_position["x"]
-    var y: float = map_position["y"]
-    button.anchor_left = x
-    button.anchor_right = x
-    button.anchor_top = y
-    button.anchor_bottom = y
-    button.offset_left = -MARKER_HALF_WIDTH
-    button.offset_right = MARKER_HALF_WIDTH
-    button.offset_top = -MARKER_HALF_HEIGHT
-    button.offset_bottom = MARKER_HALF_HEIGHT
-
-    button.pressed.connect(_on_mission_pressed.bind(mission["mission_id"]))
-    return button
-
-
-func _status_label_for(mission: Dictionary) -> String:
-    var rule: Dictionary = ExerciseEngine.get_rule(mission["rule_id"])
-    var skill_id: String = rule.get("skill", "")
-    var skill_state := ProgressManager.get_skill_state(skill_id)
-    var status: String = skill_state["status"]
-    return UIText.get_text("world_map.status_%s" % status)
-
-
 func _on_mission_pressed(mission_id: String) -> void:
     GameManager.pending_mission_id = mission_id
     GameManager.goto(GameManager.SCENE_MISSION_INTRO)