feat(medications): 优化药物显示逻辑，未服用药品优先排序并更新计数逻辑

app/(tabs)/medications.tsx

@@ -177,12 +177,24 @@ export default function MedicationsScreen() {
     if (activeFilter === 'all') {
       return medicationsWithImages;
     }
+    
+    // "未服用" tab 包含 missed（已错过）和 upcoming（待服用）两种状态
+    if (activeFilter === 'missed') {
+      return medicationsWithImages.filter((item: any) =>
+        item.status === 'missed' || item.status === 'upcoming'
+      );
+    }
+    
+    // 其他状态按原逻辑过滤
     return medicationsWithImages.filter((item: any) => item.status === activeFilter);
   }, [activeFilter, medicationsWithImages]);
 
   const counts = useMemo(() => {
     const taken = medicationsWithImages.filter((item: any) => item.status === 'taken').length;
-    const missed = medicationsWithImages.filter((item: any) => item.status === 'missed').length;
+    // "未服用"计数包含 missed（已错过）和 upcoming（待服用）
+    const missed = medicationsWithImages.filter((item: any) =>
+      item.status === 'missed' || item.status === 'upcoming'
+    ).length;
     return {
       all: medicationsWithImages.length,
       taken,

store/medicationsSlice.ts

@@ -729,6 +729,7 @@ export const selectSelectedDateStats = (state: RootState) => {
 /**
  * 获取指定日期的展示项列表（用于UI渲染）
  * 将药物记录和药物信息合并为展示项
+ * 排序规则：优先显示未服用的药品（upcoming、missed），然后是已服用的药品（taken、skipped）
  */
 export const selectMedicationDisplayItemsByDate = (date: string) => (state: RootState) => {
   const records = state.medications.medicationRecords[date] || [];
@@ -739,7 +740,7 @@ export const selectMedicationDisplayItemsByDate = (date: string) => (state: Root
   medications.forEach((med) => medicationMap.set(med.id, med));
   
   // 转换为展示项
-  return records
+  const displayItems = records
     .map((record) => {
       const medication =  medicationMap.get(record.medicationId);
       if (!medication) return null;
@@ -768,6 +769,29 @@ export const selectMedicationDisplayItemsByDate = (date: string) => (state: Root
       } as import('@/types/medication').MedicationDisplayItem;
     })
     .filter((item): item is import('@/types/medication').MedicationDisplayItem => item !== null);
+  
+  // 排序：未服用的药品（upcoming、missed）优先，已服用的药品（taken、skipped）其次
+  // 在同一组内，按计划时间升序排列
+  return displayItems.sort((a, b) => {
+    // 定义状态优先级：数值越小优先级越高
+    const statusPriority: Record<MedicationStatus, number> = {
+      'missed': 1,      // 已错过 - 最高优先级
+      'upcoming': 2,    // 待服用
+      'taken': 3,       // 已服用
+      'skipped': 4,     // 已跳过
+    };
+    
+    const priorityA = statusPriority[a.status];
+    const priorityB = statusPriority[b.status];
+    
+    // 首先按状态优先级排序
+    if (priorityA !== priorityB) {
+      return priorityA - priorityB;
+    }
+    
+    // 状态相同时，按计划时间升序排列
+    return a.scheduledTime.localeCompare(b.scheduledTime);
+  });
 };
 
 // ==================== Export ====================