feat: add npc decision inspector

tests/npc_visual_lifecycle_test.gd

@@ -16,10 +16,38 @@ func _run() -> void:
 
 	var manager: Node = main_scene.get_node("SimulationManager")
 	var view: Node = main_scene.get_node("WorldViewManager")
+	var ui: CanvasLayer = main_scene.get_node("UI")
 	manager.set_process(false)
 	var npc: SimNPC = manager.npcs[0]
 	var visual: Node3D = view.active_npc_visuals[npc.id]
 	visual.set_physics_process(false)
+	var profession_definition := SimulationDefinitions.get_profession(npc.profession)
+	var body: MeshInstance3D = visual.get_node("MeshInstance3D")
+	_check(
+		body.material_override.albedo_color == profession_definition.visual_color,
+		"NPC body color should come from its profession definition"
+	)
+	_check(
+		visual.get_node("ProfessionProp").mesh != null
+		and profession_definition.display_name in visual.get_node("ProfessionLabel").text,
+		"NPC visual should expose a profession prop and readable label"
+	)
+	var test_decision := ActionSelectionResult.new(
+		SimulationIds.ACTION_GATHER_FOOD,
+		-1.0,
+		"Test shortage reason",
+		{SimulationIds.ACTION_GATHER_FOOD: 4.5}
+	)
+	manager.latest_decisions[npc.id] = test_decision
+	manager.emit_signal("npc_decision_recorded", npc, test_decision)
+	var inspector_label: Label = ui.get_node(
+		"NpcInspectorPanel/MarginContainer/NpcInspectorLabel"
+	)
+	_check(
+		"Test shortage reason" in inspector_label.text
+		and npc.npc_name in inspector_label.text,
+		"NPC inspector should show the selected villager's real decision reason"
+	)
 	var carried_food: MeshInstance3D = visual.get_node("CarriedFood")
 	_check(not carried_food.visible, "NPC should begin without a carried-food prop")
 	npc.add_inventory(SimulationIds.RESOURCE_FOOD, 1.0)