style(entry): 主按钮换心跳波形 icon,暂时隐藏练一练菜单

主按钮:
- "练" 单字改为 EKG 心跳波形 SVG icon
- 内联 data-uri SVG, 60rpx, 白色 stroke 2.6, 圆角线
- 加 1.6s 心跳脉动动画,模拟两次收缩(20%/40%),
  跟外圈呼吸光环错频,层次感更强
- 健康主题更直观,跟运动/节拍场景契合

菜单:
- "练一练" 项暂时注释隐藏(后续恢复直接取消注释)
- 当前展开只剩"节拍器"一个入口

Co-authored-by: Cursor <cursoragent@cursor.com>

TUICallKit-Vue3/components/dev-training-entry/index.vue

@@ -2,8 +2,9 @@
     <view v-if="visible" class="dev-entry-wrap" :style="{ bottom: props.bottom + 'rpx' }">
         <!-- 展开后的菜单卡片(从下往上动画) -->
         <view v-if="expanded" class="menu-list" @click.stop>
+            <!-- "练一练" 暂时隐藏,后续恢复时取消注释即可
             <view class="menu-item" @click="goto('/pages/training/index')">
-                <view class="menu-icon menu-icon--train">
+                <view class="menu-icon menu-icon&#45;&#45;train">
                     <text class="menu-icon-text">💪</text>
                 </view>
                 <view class="menu-info">
@@ -12,6 +13,7 @@
                 </view>
                 <view class="menu-arrow">›</view>
             </view>
+            -->
             <view class="menu-item" @click="goto('/pages/training/metronome')">
                 <view class="menu-icon menu-icon--metro">
                     <view class="metro-bar metro-bar-1" />
@@ -35,7 +37,8 @@
                     <view class="cross-bar bar-1" />
                     <view class="cross-bar bar-2" />
                 </view>
-                <text v-else class="fab-text">练</text>
+                <!-- 心跳波形 icon: 健康主题,SVG 折线 -->
+                <view v-else class="fab-icon" />
             </view>
         </view>
     </view>
@@ -125,13 +128,26 @@ $brand-light: #34d399;
             inset 0 6rpx 14rpx rgba(255, 255, 255, 0.12);
     }
 
-    .fab-text {
-        font-size: 48rpx;
-        font-weight: 800;
-        color: #fff;
-        line-height: 1;
-        letter-spacing: 2rpx;
-        text-shadow: 0 2rpx 6rpx rgba(0, 0, 0, 0.18);
+    .fab-icon {
+        width: 60rpx;
+        height: 60rpx;
+        background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'><polyline points='2,12 7,12 9.5,7 12,17 14.5,9 16.5,12 22,12'/></svg>");
+        background-size: contain;
+        background-repeat: no-repeat;
+        background-position: center;
+        filter: drop-shadow(0 2rpx 6rpx rgba(0, 0, 0, 0.22));
+        animation: fab-icon-beat 1.6s ease-in-out infinite;
+    }
+}
+@keyframes fab-icon-beat {
+    0%, 60%, 100% {
+        transform: scale(1);
+    }
+    20% {
+        transform: scale(1.12);
+    }
+    40% {
+        transform: scale(1);
     }
 }