fix(editor): move build stamp to bottom, expand palette list, add hover feedback and instructions

scripts/editor/ui/editor_toolbar.gd

@@ -8,11 +8,11 @@ signal tool_selected(tool_id: String)
 signal undo_pressed
 signal redo_pressed
 
-const TOOL_LABELS := {
-	"select": "Select",
-	"brush": "Brush",
-	"object_place": "Place",
-	"erase": "Erase",
+const TOOL_CONFIG := {
+	"brush": {"label": "Brush (B)", "tooltip": "Paint solid ground tiles (drag to paint; 0-9 for tile types)"},
+	"select": {"label": "Select (V)", "tooltip": "Select and inspect placed objects"},
+	"object_place": {"label": "Place (P)", "tooltip": "Place objects from the Palette onto the grid"},
+	"erase": {"label": "Erase (X)", "tooltip": "Erase tiles or objects (drag to erase)"},
 }
 
 var _tool_buttons: Dictionary = {}
@@ -25,9 +25,11 @@ func _init() -> void:
 
 
 func _ready() -> void:
-	for tool_id in TOOL_LABELS:
+	for tool_id in TOOL_CONFIG:
 		var btn := Button.new()
-		btn.text = TOOL_LABELS[tool_id]
+		var cfg: Dictionary = TOOL_CONFIG[tool_id]
+		btn.text = cfg["label"]
+		btn.tooltip_text = cfg["tooltip"]
 		btn.toggle_mode = true
 		btn.pressed.connect(_on_tool_button_pressed.bind(tool_id))
 		add_child(btn)
@@ -36,12 +38,16 @@ func _ready() -> void:
 	add_child(VSeparator.new())
 
 	_undo_button = Button.new()
-	_undo_button.text = "Undo"
+	_undo_button.text = "Undo (Ctrl+Z)"
+	_undo_button.tooltip_text = "Undo last action"
+	_undo_button.disabled = true
 	_undo_button.pressed.connect(func(): undo_pressed.emit())
 	add_child(_undo_button)
 
 	_redo_button = Button.new()
-	_redo_button.text = "Redo"
+	_redo_button.text = "Redo (Ctrl+Y)"
+	_redo_button.tooltip_text = "Redo last undone action"
+	_redo_button.disabled = true
 	_redo_button.pressed.connect(func(): redo_pressed.emit())
 	add_child(_redo_button)
 
@@ -54,7 +60,15 @@ func _on_tool_button_pressed(tool_id: String) -> void:
 ## Reflect the active tool in the button states without re-emitting the signal.
 func set_active_tool(tool_id: String) -> void:
 	for id in _tool_buttons:
-		_tool_buttons[id].button_pressed = (id == tool_id)
+		var btn: Button = _tool_buttons[id]
+		var is_active: bool = (str(id) == tool_id)
+		btn.button_pressed = is_active
+		if is_active:
+			btn.add_theme_color_override("font_color", Color(1.0, 0.95, 0.3))
+			btn.add_theme_color_override("font_pressed_color", Color(1.0, 0.95, 0.3))
+		else:
+			btn.remove_theme_color_override("font_color")
+			btn.remove_theme_color_override("font_pressed_color")
 
 
 ## Reflect whether undo/redo currently have anything to do.