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

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: