继续收口NPC弹窗与角色详情空态

统一 NPC 弹窗底部动作按钮与交易详情空态到共享组件
统一角色构筑详情空明细到 PlatformEmptyState
补充 PlatformUiKit 收口计划、共享决策记录与对应测试护栏

src/components/CharacterInfoShared.tsx

@@ -352,14 +352,14 @@ export function BuildContributionDetailPanel({
             ))}
           </div>
         ) : (
-          <PlatformSubpanel
-            surface="dark"
-            radius="xs"
-            padding="sm"
-            className="mt-4 px-4 py-3 text-sm leading-6 text-zinc-400"
+          <PlatformEmptyState
+            surface="editorDark"
+            size="compact"
+            tone="soft"
+            className="mt-4"
           >
             {emptyText}
-          </PlatformSubpanel>
+          </PlatformEmptyState>
         )}
       </PlatformSubpanel>
     </div>