收口运行态状态提示组件

新增 PlatformRuntimeStatusToast 统一运行态短错误、成功和反馈 toast
迁移跳一跳、拼图、敲木鱼、方洞和宝贝爱画运行态状态 chip
补充公共组件与运行态回归测试，并更新 PlatformUiKit 文档和 Hermes 决策记录

src/components/edutainment-runtime/BabyLoveDrawingRuntimeShell.test.tsx

@@ -117,7 +117,11 @@ test('finish then save stores original drawing in local demo service', () => {
       magicImageSrc: null,
     }),
   );
-  expect(screen.getByText('已保存')).toBeTruthy();
+  const savedToast = screen.getByText('已保存');
+  expect(savedToast.className).toContain('platform-runtime-status-toast');
+  expect(savedToast.className).toContain(
+    'baby-love-drawing-runtime__status--saved',
+  );
 });
 
 test('back button calls onBack callback', () => {

src/components/edutainment-runtime/BabyLoveDrawingRuntimeShell.tsx

@@ -31,6 +31,7 @@ import {
 } from '../../services/edutainment-baby-drawing';
 import type { MocapHandInput } from '../../services/useMocapInput';
 import { useMocapInput } from '../../services/useMocapInput';
+import { PlatformRuntimeStatusToast } from '../common/PlatformRuntimeStatusToast';
 import {
   appendPointToStroke,
   BABY_LOVE_DRAWING_BRUSH_SIZE,
@@ -884,14 +885,23 @@ export function BabyLoveDrawingRuntimeShell({
       </div>
 
       {error ? (
-        <div className="baby-love-drawing-runtime__error">{error}</div>
+        <PlatformRuntimeStatusToast
+          tone="error"
+          className="baby-love-drawing-runtime__status baby-love-drawing-runtime__status--top"
+        >
+          {error}
+        </PlatformRuntimeStatusToast>
       ) : null}
 
       {savedRecord ? (
-        <div className="baby-love-drawing-runtime__saved" role="status">
+        <PlatformRuntimeStatusToast
+          tone="success"
+          role="status"
+          className="baby-love-drawing-runtime__status baby-love-drawing-runtime__status--saved"
+        >
           <ImagePlus className="h-5 w-5" />
           已保存
-        </div>
+        </PlatformRuntimeStatusToast>
       ) : null}
 
       {leftHandPoint ? (