fix: 补回recordCardIncrement，点红点后pendingCount正确扣减

问题：recordCardIncrement调用被之前简化代码时删掉了，
导致_cardIncrements为空→acknowledgedCount=0→pendingCount不减。

修复：在diffStats后对每个changed分类记录增量，
这样acknowledgeCard后pendingCount能正确扣减。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/ui/home/HomeFragment.kt

@@ -373,6 +373,14 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
                         Timber.d("首页: diffStats changed=$changed, ack=$ack, activeDots=$activeDotCards")
                         for (status in changed) {
                             if (status !in ack) activeDotCards.add(status)
+                            // 记录每个分类的增量（供 acknowledgeCard 扣减 pendingCount 用）
+                            val increment = when (status) {
+                                2 -> data.waitForTask - baseline.waitForTask
+                                3 -> data.treatTask - baseline.treatTask
+                                4 -> data.incompleteTask - baseline.incompleteTask
+                                else -> 0
+                            }
+                            notificationManager.recordCardIncrement(status, increment)
                         }
                     } else {
                         Timber.d("首页: baseline为null，兜底显示所有有值的红点")