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.

scripts/editor/ui/editor_viewport.gd

@@ -26,6 +26,12 @@ var pending_catalog_id: String = ""
 ## Tile id the next "brush" click paints. Cycled with number keys 0-9.
 var current_tile_id: int = 1
 
+var _hover_tx: int = -1
+var _hover_ty: int = -1
+var _mouse_down: bool = false
+var _last_drag_tx: int = -1
+var _last_drag_ty: int = -1
+
 const TILE_EMPTY_COLOR := Color(0.15, 0.15, 0.17)
 const TILE_SOLID_COLOR := Color(0.35, 0.55, 0.35)
 const GRID_COLOR := Color(0, 0, 0, 0.25)
@@ -39,6 +45,16 @@ func _init() -> void:
 	focus_mode = Control.FOCUS_ALL
 
 
+func _notification(what: int) -> void:
+	if what == NOTIFICATION_MOUSE_EXIT:
+		_hover_tx = -1
+		_hover_ty = -1
+		_mouse_down = false
+		_last_drag_tx = -1
+		_last_drag_ty = -1
+		queue_redraw()
+
+
 func setup(p_core: EditorCore, p_layer_idx: int = 0) -> void:
 	core = p_core
 	layer_idx = p_layer_idx
@@ -76,11 +92,32 @@ func _draw() -> void:
 	for y in range(layer.height + 1):
 		draw_line(Vector2(0, y * cell_size), Vector2(layer.width * cell_size, y * cell_size), GRID_COLOR)
 
+	# Hover highlight over current cell
+	if _hover_tx >= 0 and _hover_tx < layer.width and _hover_ty >= 0 and _hover_ty < layer.height:
+		var h_rect := Rect2(_hover_tx * cell_size, _hover_ty * cell_size, cell_size, cell_size)
+		draw_rect(h_rect, Color(1.0, 1.0, 1.0, 0.2), true)
+		draw_rect(h_rect, Color(1.0, 0.95, 0.3, 0.85), false, 2.0)
+		if core.tools.get_active_tool_id() == "object_place" and pending_catalog_id != "":
+			var ghost_pos := Vector2((_hover_tx + 0.5) * cell_size, (_hover_ty + 0.5) * cell_size)
+			draw_circle(ghost_pos, cell_size * 0.35, Color(1.0, 0.8, 0.2, 0.5))
+
+	var default_font := ThemeDB.fallback_font
 	for obj in core.model.payload.objects:
 		var center := Vector2(obj.position.x * cell_size, obj.position.y * cell_size)
 		var is_selected: bool = core.selection.get_selected() == obj.id
 		var color := OBJECT_SELECTED_COLOR if is_selected else OBJECT_COLOR
-		draw_circle(center, cell_size * 0.3, color)
+		var r := cell_size * 0.38
+		draw_circle(center, r, color)
+		draw_arc(center, r, 0.0, TAU, 16, Color(0, 0, 0, 0.85), 1.5)
+		if is_selected:
+			draw_arc(center, r + 3.0, 0.0, TAU, 16, Color(1, 1, 1, 0.95), 2.0)
+
+		var display_name: String = ""
+		if obj.properties is Dictionary and obj.properties.has("display_name"):
+			display_name = str(obj.properties["display_name"])
+		if display_name == "":
+			display_name = obj.id
+		draw_string(default_font, center + Vector2(-r * 1.5, -r - 2), display_name.left(6), HORIZONTAL_ALIGNMENT_CENTER, int(r * 3.0), 10, Color(1, 1, 1, 0.9))
 
 
 func _gui_input(event: InputEvent) -> void:
@@ -88,9 +125,27 @@ func _gui_input(event: InputEvent) -> void:
 		return
 	if event is InputEventMouseButton:
 		var mb := event as InputEventMouseButton
-		if mb.pressed and mb.button_index == MOUSE_BUTTON_LEFT:
-			_handle_click(mb.position)
-			accept_event()
+		if mb.button_index == MOUSE_BUTTON_LEFT:
+			_mouse_down = mb.pressed
+			if mb.pressed:
+				_handle_click(mb.position)
+				accept_event()
+			else:
+				_last_drag_tx = -1
+				_last_drag_ty = -1
+	elif event is InputEventMouseMotion:
+		var mm := event as InputEventMouseMotion
+		var tx := int(floor(mm.position.x / cell_size))
+		var ty := int(floor(mm.position.y / cell_size))
+		if tx != _hover_tx or ty != _hover_ty:
+			_hover_tx = tx
+			_hover_ty = ty
+			queue_redraw()
+		if _mouse_down and (tx != _last_drag_tx or ty != _last_drag_ty):
+			var active_tool := core.tools.get_active_tool_id()
+			if active_tool in ["brush", "erase"]:
+				_handle_click(mm.position)
+		accept_event()
 	elif event is InputEventKey:
 		var key := event as InputEventKey
 		if key.pressed and not key.echo:
@@ -105,6 +160,8 @@ func _handle_key(key: InputEventKey) -> void:
 func _handle_click(local_pos: Vector2) -> void:
 	var tx := int(floor(local_pos.x / cell_size))
 	var ty := int(floor(local_pos.y / cell_size))
+	_last_drag_tx = tx
+	_last_drag_ty = ty
 
 	match core.tools.get_active_tool_id():
 		"brush":
@@ -125,6 +182,7 @@ func _handle_click(local_pos: Vector2) -> void:
 					queue_redraw()
 		"select":
 			core.select_object(_object_at(tx, ty))
+			edit_applied.emit()
 			queue_redraw()
 
 

scripts/editor/ui/in_game_editor.gd

@@ -34,6 +34,7 @@ var _viewport: EditorViewport
 var _close_button: Button
 var _save_button: Button
 var _save_status_label: Label
+var _instruction_label: Label
 
 ## Save-path state (world_persistence_impl.md §8.1/§8.2), set via
 ## `setup_persistence()`. `_save_service == null` means there is nothing to
@@ -66,11 +67,16 @@ func setup_persistence(save_service: ChunkSaveService, world_id: String, room_sl
 	_base_revision = base_revision
 	if _save_button != null:
 		_save_button.disabled = false
+		_save_button.tooltip_text = "Save chunk changes to backend (Ctrl+S)"
 
 
 func _ready() -> void:
 	_build_ui()
 	_refresh_history_buttons()
+	if core.tools.get_active_tool_id() == "select" and core.model.payload.objects.is_empty():
+		core.tools.set_active_tool("brush")
+		_toolbar.set_active_tool("brush")
+	_update_instruction()
 
 
 func _build_ui() -> void:
@@ -98,14 +104,21 @@ func _build_ui() -> void:
 	_save_button = Button.new()
 	_save_button.text = "Save (Ctrl+S)"
 	_save_button.disabled = (_save_service == null)
+	_save_button.tooltip_text = "Save changes to server (Ctrl+S)" if _save_service != null else "Saving not available in scratch mode"
 	_save_button.pressed.connect(_on_save_pressed)
 	top_bar.add_child(_save_button)
 
 	_close_button = Button.new()
-	_close_button.text = "Close (F2)"
+	_close_button.text = "Close (F2 / Esc)"
+	_close_button.tooltip_text = "Exit build mode and return to game"
 	_close_button.pressed.connect(_on_close_pressed)
 	top_bar.add_child(_close_button)
 
+	_instruction_label = Label.new()
+	_instruction_label.add_theme_font_size_override("font_size", 13)
+	_instruction_label.add_theme_color_override("font_color", Color(0.75, 0.92, 1.0))
+	root_vbox.add_child(_instruction_label)
+
 	_save_status_label = Label.new()
 	_save_status_label.autowrap_mode = TextServer.AUTOWRAP_WORD
 	_save_status_label.visible = false
@@ -124,13 +137,15 @@ func _build_ui() -> void:
 	viewport_scroll.add_child(_viewport)
 
 	var sidebar := VBoxContainer.new()
-	sidebar.custom_minimum_size = Vector2(240, 0)
+	sidebar.custom_minimum_size = Vector2(260, 0)
 	body.add_child(sidebar)
 
 	_palette = PalettePanel.new()
+	_palette.size_flags_vertical = Control.SIZE_EXPAND_FILL
 	sidebar.add_child(_palette)
 
 	_inspector = InspectorPanel.new()
+	_inspector.size_flags_vertical = Control.SIZE_EXPAND_FILL
 	sidebar.add_child(_inspector)
 
 	_viewport.setup(core, 0)
@@ -166,16 +181,34 @@ func _unhandled_key_input(event: InputEvent) -> void:
 		core.delete_object(core.selection.get_selected())
 		_on_edit_applied()
 		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_B and not key.ctrl_pressed:
+		_on_tool_selected("brush")
+		_toolbar.set_active_tool("brush")
+		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_V and not key.ctrl_pressed:
+		_on_tool_selected("select")
+		_toolbar.set_active_tool("select")
+		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_P and not key.ctrl_pressed:
+		_on_tool_selected("object_place")
+		_toolbar.set_active_tool("object_place")
+		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_X and not key.ctrl_pressed:
+		_on_tool_selected("erase")
+		_toolbar.set_active_tool("erase")
+		get_viewport().set_input_as_handled()
 
 
 func _on_tool_selected(tool_id: String) -> void:
 	core.tools.set_active_tool(tool_id)
+	_update_instruction()
 
 
 func _on_palette_object_selected(catalog_id: String) -> void:
 	_viewport.pending_catalog_id = catalog_id
 	core.tools.set_active_tool("object_place")
 	_toolbar.set_active_tool("object_place")
+	_update_instruction()
 
 
 func _on_inspector_delete_requested(object_id: String) -> void:
@@ -197,10 +230,45 @@ func _on_edit_applied() -> void:
 	_viewport.queue_redraw()
 	_inspector.show_object(core.selection.get_selected())
 	_refresh_history_buttons()
+	_update_instruction()
 
 
 func _on_selection_changed(object_id: String) -> void:
 	_inspector.show_object(object_id)
+	_update_instruction()
+
+
+func _update_instruction() -> void:
+	if _instruction_label == null:
+		return
+	var active_id := core.tools.get_active_tool_id()
+	match active_id:
+		"brush":
+			_instruction_label.text = "Tool: [ Brush ] — Left-click and drag on grid squares to paint ground tiles. (Keys 0-9 pick tile type)"
+		"object_place":
+			var name := _viewport.pending_catalog_id
+			if core.catalog != null:
+				var e := core.catalog.resolve(name)
+				if e.has("display_name"):
+					name = str(e["display_name"])
+			if name == "":
+				_instruction_label.text = "Tool: [ Place ] — Select an item in the Palette on the right, then click on the grid squares to place."
+			else:
+				_instruction_label.text = "Tool: [ Place: %s ] — Click any grid square to place '%s'." % [name, name]
+		"select":
+			if core.selection.has_selection():
+				var sel_id := core.selection.get_selected()
+				var obj := core.model.find_object(sel_id)
+				var dname := sel_id
+				if obj != null and obj.properties is Dictionary and obj.properties.has("display_name"):
+					dname = "%s (%s)" % [obj.properties["display_name"], sel_id]
+				_instruction_label.text = "Tool: [ Select ] — Selected '%s'. Edit in the Inspector on the right, or press Delete to remove." % dname
+			else:
+				_instruction_label.text = "Tool: [ Select ] — Click on a placed object on the grid to inspect it, or switch to Brush/Place to build."
+		"erase":
+			_instruction_label.text = "Tool: [ Erase ] — Left-click and drag on grid squares to erase painted tiles or delete objects."
+		_:
+			_instruction_label.text = "Tool: [ %s ]" % active_id
 
 
 func _refresh_history_buttons() -> void:

scripts/editor/ui/inspector_panel.gd

@@ -37,11 +37,14 @@ var _fields_box: VBoxContainer
 
 func _init() -> void:
 	name = "InspectorPanel"
+	size_flags_vertical = Control.SIZE_EXPAND_FILL
 
 
 func _ready() -> void:
 	var header := Label.new()
 	header.text = "Inspector"
+	header.add_theme_font_size_override("font_size", 15)
+	header.add_theme_color_override("font_color", Color(1, 0.95, 0.4))
 	add_child(header)
 
 	_empty_label = Label.new()

scripts/editor/ui/palette_panel.gd

@@ -14,15 +14,26 @@ var _ids: Array[String] = []
 
 func _init() -> void:
 	name = "PalettePanel"
+	size_flags_vertical = Control.SIZE_EXPAND_FILL
 
 
 func _ready() -> void:
 	var header := Label.new()
 	header.text = "Palette"
+	header.add_theme_font_size_override("font_size", 15)
+	header.add_theme_color_override("font_color", Color(1, 0.95, 0.4))
 	add_child(header)
 
+	var hint := Label.new()
+	hint.text = "Click an item to place on the grid:"
+	hint.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
+	hint.add_theme_font_size_override("font_size", 11)
+	hint.add_theme_color_override("font_color", Color(0.7, 0.7, 0.7))
+	add_child(hint)
+
 	_list = ItemList.new()
 	_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
+	_list.custom_minimum_size = Vector2(0, 180)
 	_list.item_selected.connect(_on_item_selected)
 	add_child(_list)
 

scripts/game.gd

@@ -85,7 +85,11 @@ func _toggle_build_mode() -> void:
 
 
 func _open_build_mode() -> void:
-	var model := ChunkEditorModel.create_empty(32, 32, str(Session.world_id), "main")
+	var world_id_str := str(Session.world_id) if Session.world_id != null else "0"
+	var room_slug := "main"
+	var coord := Vector3i.ZERO
+
+	var model := ChunkEditorModel.create_empty(32, 32, world_id_str, room_slug, coord)
 	var catalog := EditorObjectCatalog.new()
 	var err := catalog.load_catalog()
 	if err != OK:
@@ -93,6 +97,13 @@ func _open_build_mode() -> void:
 	var core := EditorCore.new(model, catalog)
 
 	_build_editor = InGameEditor.new(core)
+	if int(world_id_str) > 0:
+		var save_service := ChunkSaveService.new()
+		save_service.world_id = world_id_str
+		save_service.room_slug = room_slug
+		add_child(save_service)
+		_build_editor.setup_persistence(save_service, world_id_str, room_slug, coord, 0)
+
 	_build_editor.closed.connect(_close_build_mode)
 	add_child(_build_editor)
 
@@ -109,6 +120,9 @@ func _close_build_mode() -> void:
 	if _build_editor != null and is_instance_valid(_build_editor):
 		_build_editor.queue_free()
 	_build_editor = null
+	for child in get_children():
+		if child is ChunkSaveService:
+			child.queue_free()
 	_player.set_physics_process(true)
 	_player.set_process_unhandled_input(true)
 	_player._refresh_mouse_mode()
@@ -210,19 +224,18 @@ func _show_build_stamp() -> void:
 	add_child(layer)
 	var lbl := Label.new()
 	lbl.text = "build %s" % _build_label()
-	lbl.add_theme_color_override("font_color", Color(1, 1, 0.35))
+	lbl.add_theme_color_override("font_color", Color(1, 1, 0.35, 0.85))
 	lbl.add_theme_color_override("font_outline_color", Color(0, 0, 0, 1))
-	lbl.add_theme_constant_override("outline_size", 6)
-	lbl.add_theme_font_size_override("font_size", 20)
-	# Full-width strip pinned to the TOP-left. (A bare preset + .position on a
-	# zero-size Label collapses the rect to negative width and nothing draws --
-	# which is why this never showed; explicit offsets fix it.)
-	lbl.set_anchors_preset(Control.PRESET_TOP_WIDE)
-	lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_LEFT
+	lbl.add_theme_constant_override("outline_size", 4)
+	lbl.add_theme_font_size_override("font_size", 14)
+	# Pinned to the BOTTOM-right so it never blocks top menu or editor toolbars.
+	lbl.set_anchors_preset(Control.PRESET_BOTTOM_WIDE)
+	lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
+	lbl.vertical_alignment = VERTICAL_ALIGNMENT_BOTTOM
 	lbl.offset_left = 12
-	lbl.offset_right = -12
-	lbl.offset_top = 8
-	lbl.offset_bottom = 40
+	lbl.offset_right = -16
+	lbl.offset_top = -32
+	lbl.offset_bottom = -8
 	lbl.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	layer.add_child(lbl)