fix(open-api): schedules 的缓存/Redis 分支补齐 voteCount，消除分支间字段不一致

上一步只给数据库分支补了 voteCount，但实测该接口通常命中缓存分支，
导致 voteCount 依然缺失。抽出 buildVoteCountMap() 供三条分支共用，
保证无论缓存命中与否，输出结构一致。

server/api/open/schedules.get.ts

@@ -21,6 +21,32 @@ import {
   type VisibilitySettingsLike
 } from '~~/server/utils/schedule-visibility'
 
+/**
+ * 批量统计歌曲票数。
+ *
+ * 该接口有缓存分支和数据库分支两条路径，此前字段互不一致
+ * （序列号只在缓存分支有、票数只在数据库分支有）。统一由本函数提供票数，
+ * 保证把缓存开关、Redis 开关怎么组合，输出结构都一致。
+ */
+async function buildVoteCountMap(songIds: number[]): Promise<Map<number, number>> {
+  const map = new Map<number, number>()
+  if (songIds.length === 0) return map
+
+  const rows = await db
+    .select({
+      songId: votes.songId,
+      count: sql`count(*)`
+    })
+    .from(votes)
+    .where(inArray(votes.songId, songIds))
+    .groupBy(votes.songId)
+
+  rows.forEach((row) => {
+    map.set(row.songId, Number(row.count))
+  })
+  return map
+}
+
 export default defineEventHandler(async (event) => {
   try {
     const query = getQuery(event)
@@ -85,6 +111,10 @@ export default defineEventHandler(async (event) => {
       }
       filteredSchedules = applyVisibilityFilter(filteredSchedules)
 
+      const voteCounts = await buildVoteCountMap(
+        filteredSchedules.map((s: any) => s.song?.id).filter(Boolean)
+      )
+
       // 转换为开放API格式
       const result = {
         success: true,
@@ -101,7 +131,8 @@ export default defineEventHandler(async (event) => {
               semester: schedule.song.semester,
               cover: schedule.song.cover,
               musicPlatform: schedule.song.musicPlatform,
-              musicId: schedule.song.musicId
+              musicId: schedule.song.musicId,
+              voteCount: voteCounts.get(schedule.song.id) || 0
             },
             playTime: schedule.playTime
               ? {
@@ -141,6 +172,11 @@ export default defineEventHandler(async (event) => {
 
       if (redisData) {
         const filteredRedisData = applyVisibilityFilter(redisData)
+
+        const voteCounts = await buildVoteCountMap(
+          filteredRedisData.map((s: any) => s.song?.id).filter(Boolean)
+        )
+
         // 转换为开放API格式
         const result = {
           success: true,
@@ -157,7 +193,8 @@ export default defineEventHandler(async (event) => {
                 semester: schedule.song.semester,
                 cover: schedule.song.cover,
                 musicPlatform: schedule.song.musicPlatform,
-                musicId: schedule.song.musicId
+                musicId: schedule.song.musicId,
+                voteCount: voteCounts.get(schedule.song.id) || 0
               },
               playTime: schedule.playTime
                 ? {
@@ -322,24 +359,7 @@ export default defineEventHandler(async (event) => {
       })
     }
 
-    // 统计每首歌的票数。
-    // 该接口的缓存分支（本文件上方）会返回 voteCount，数据库分支此前漏了，
-    // 导致两条分支字段不一致，这里补齐。
-    const voteCountsMap = new Map<number, number>()
-    if (songIds.length > 0) {
-      const voteCountsData = await db
-        .select({
-          songId: votes.songId,
-          count: sql`count(*)`
-        })
-        .from(votes)
-        .where(inArray(votes.songId, songIds))
-        .groupBy(votes.songId)
-
-      voteCountsData.forEach((row) => {
-        voteCountsMap.set(row.songId, Number(row.count))
-      })
-    }
+    const voteCountsMap = await buildVoteCountMap(songIds)
 
     // 格式化数据
     const formattedSchedules = schedulesData.map((schedule) => {