feat(training): 新增握力环 2.0 摄像头手势识别页

用前置摄像头 + VisionKit/ROI 管线驱动开合计数，复用跟练舞台与连击粒子，并加固结束收尾避免末段卡死无响应。

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

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

@@ -116,6 +116,17 @@
                 <view class="menu-arrow">›</view>
             </view>
 
+            <view class="menu-item" @click="goto('/training/pages/camera-grip-ring')">
+                <view class="menu-icon menu-icon--grip">
+                    <view class="grip-ring-shape" />
+                </view>
+                <view class="menu-info">
+                    <text class="menu-title">握力环 2.0</text>
+                    <text class="menu-sub">摄像头识别 · 试玩</text>
+                </view>
+                <view class="menu-arrow">›</view>
+            </view>
+
             <view class="menu-item" @click="goto('/training/pages/metronome')">
                 <view class="menu-icon menu-icon--metro">
                     <view class="metro-bar metro-bar-1" />
@@ -163,6 +174,7 @@ const trainingItems: TrainingItem[] = [
     { url: '/training/pages/foot-pedal', title: '脚蹬器', sub: '下肢有氧', icon: 'pedal', iconClass: 'menu-icon--pedal' },
     { url: '/training/pages/pilates-ring', title: '瑜伽环', sub: '核心塑形', icon: 'pilates', iconClass: 'menu-icon--pilates' },
     { url: '/training/pages/grip-ring', title: '握力环', sub: '握力训练', icon: 'grip', iconClass: 'menu-icon--grip' },
+    { url: '/training/pages/camera-grip-ring', title: '握力环 2.0', sub: '摄像头识别', icon: 'grip', iconClass: 'menu-icon--grip' },
     { url: '/training/pages/metronome', title: '耗糖节拍器', sub: '健走配速', icon: 'metro', iconClass: 'menu-icon--metro', featured: true },
 ]