fix(timer): 完成页圆环覆盖弹窗 + 自定义确认 modal 替代 wx.showModal

训练完成的三个相关 bug:
1. progress-ring 圆环覆盖完成页弹窗 → @tap ring wx:if 让完成态时直接 unmount
2. 完成弹窗内按钮需要点 2 次才能响应 → completion-mask 加 catchtouchmove 拦截 touchmove
3. wx.showModal "结束训练" 系统弹窗在 stacking context 下 hit-test 不稳

根因: .timer-page.page-enter 永久保留 transform: translateY(0),
创建永久 stacking context,影响 native modal 的 WebView 部分 hit-test。

修法:
- 新增自定义 stop-confirm modal (catchtouchmove + 内部 catchtap + bindtap),
  与 ui-modal/settings.plan-editor-mask 同模式,行为可靠
- completion-mask 用相同模式拦截 touchmove
- 顺便修 overtime-badge 暗色 (rgba(var(--success-rgb)))

pages/timer/timer.js

@@ -25,6 +25,7 @@ Page({
     confettiPieces: [],
     // Completion modal (full-screen summary after training ends)
     showCompletion: false,
+    showStopConfirm: false,  // 自定义"结束训练"确认弹窗,替代 wx.showModal
     completionElapsed: 0,
     completionTarget: 0,
     completionOvertime: 0,
@@ -260,13 +261,19 @@ Page({
   },
 
   onStop() {
-    wx.showModal({
-      title: '结束训练',
-      content: '确定要结束本次训练吗?',
-      success: (res) => {
-        if (res.confirm) this.finishTraining()
-      }
-    })
+    // 用自定义确认弹窗替代 wx.showModal:
+    // 系统原生 modal 在 WebView stacking context 下 hit-test 偶发不稳,
+    // 自定义 modal + catchtouchmove 与现有 completion-mask 同模式,行为更可靠。
+    this.setData({ showStopConfirm: true })
+  },
+
+  onStopCancel() {
+    this.setData({ showStopConfirm: false })
+  },
+
+  onStopConfirm() {
+    this.setData({ showStopConfirm: false })
+    this.finishTraining()
   },
 
   finishTraining() {
@@ -381,5 +388,10 @@ Page({
       // Re-init countUp so the big number rolls again on next start
       _countUpTask: null
     })
-  }
+  },
+
+  // No-op handler for catchtouchmove. Swallows move events that would
+  // otherwise bubble to underlying timer page controls (causing missed
+  // taps on the completion modal).
+  onNoop() { /* swallow */ }
 })

pages/timer/timer.wxml

@@ -25,6 +25,7 @@
       wx:if="{{status !== 'completed'}}"></view>
 
     <progress-ring
+      wx:if="{{status !== 'completed'}}"
       duration="{{duration}}"
       remaining="{{isCompleted ? 0 : remaining}}"
       size="{{360}}"
@@ -32,6 +33,7 @@
       status="{{status}}"
       primaryColor="{{theme.primary}}"
       primaryLightColor="{{theme.primaryLight}}"
+      trackColor="{{isDark ? '#2C2C2E' : '#EEEEEE'}}"
     ></progress-ring>
 
     <!-- 完成庆祝粒子 -->
@@ -114,8 +116,21 @@
     </view>
   </view>
 
+  <!-- 自定义"结束训练"确认弹窗 — 替代 wx.showModal,避免系统原生 modal
+       在 WebView stacking context 下 hit-test 不稳的问题 -->
+  <view class="stop-confirm-mask" wx:if="{{showStopConfirm}}" catchtouchmove="onNoop">
+    <view class="stop-confirm-card" catchtap="onNoop">
+      <text class="stop-confirm-title">结束训练</text>
+      <text class="stop-confirm-content">确定要结束本次训练吗?</text>
+      <view class="stop-confirm-actions">
+        <view class="stop-confirm-btn" bindtap="onStopCancel">取消</view>
+        <view class="stop-confirm-btn stop-confirm-btn--primary" bindtap="onStopConfirm">确定</view>
+      </view>
+    </view>
+  </view>
+
   <!-- 完成训练全屏弹窗 -->
-  <view class="completion-mask" wx:if="{{showCompletion}}">
+  <view class="completion-mask" wx:if="{{showCompletion}}" catchtouchmove="onNoop">
     <view class="completion-card">
       <view class="completion-emoji-wrap">
         <text class="completion-emoji">{{completionLevel === 'first' ? '🎉' : completionLevel === 'record' ? '🏆' : completionLevel === 'milestone' ? '🔥' : '✨'}}</text>

pages/timer/timer.wxss

@@ -70,8 +70,8 @@
   bottom: 10rpx;
   left: 50%;
   transform: translateX(-50%);
-  background: rgba(76, 175, 80, 0.12);
-  border: 2rpx solid rgba(76, 175, 80, 0.3);
+  background: rgba(var(--success-rgb), 0.12);
+  border: 2rpx solid rgba(var(--success-rgb), 0.3);
   color: var(--success);
   padding: 8rpx 24rpx;
   border-radius: 24rpx;
@@ -393,3 +393,84 @@
   font-size: 26rpx;
   margin-top: 4rpx;
 }
+
+/* ---- stop confirm modal (替代 wx.showModal,自定义实现) ---- */
+.stop-confirm-mask {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.55);
+  z-index: 9999;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 40rpx;
+  box-sizing: border-box;
+  animation: completionMaskIn 0.25s ease;
+}
+
+.stop-confirm-card {
+  width: 100%;
+  max-width: 560rpx;
+  background: var(--card-bg);
+  border-radius: 24rpx;
+  padding: 48rpx 40rpx 24rpx;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  box-shadow: 0 12rpx 36rpx rgba(0, 0, 0, 0.22);
+  animation: stopConfirmPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
+}
+
+@keyframes stopConfirmPop {
+  0%   { transform: scale(0.85); opacity: 0; }
+  100% { transform: scale(1);    opacity: 1; }
+}
+
+.stop-confirm-title {
+  font-size: 32rpx;
+  font-weight: 700;
+  color: var(--text);
+  margin-bottom: 20rpx;
+  line-height: 1.3;
+}
+
+.stop-confirm-content {
+  font-size: 28rpx;
+  color: var(--text-secondary);
+  line-height: 1.5;
+  text-align: center;
+  margin-bottom: 40rpx;
+}
+
+.stop-confirm-actions {
+  display: flex;
+  width: 100%;
+  gap: 16rpx;
+  border-top: 1rpx solid var(--border);
+  padding-top: 24rpx;
+}
+
+.stop-confirm-btn {
+  flex: 1;
+  height: 80rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 30rpx;
+  font-weight: 600;
+  border-radius: 12rpx;
+  background: var(--bg-soft);
+  color: var(--text);
+  transition: transform 0.15s ease, opacity 0.15s ease, background 0.2s ease;
+}
+
+.stop-confirm-btn:active {
+  transform: scale(0.96);
+  opacity: 0.85;
+}
+
+.stop-confirm-btn--primary {
+  background: linear-gradient(135deg, var(--primary), var(--primary-light));
+  color: #FFFFFF;
+  box-shadow: 0 6rpx 16rpx rgba(var(--primary-rgb), 0.3);
+}