diff --git a/cloudfunctions/leaderboard/index.js b/cloudfunctions/leaderboard/index.js
index de0d675..c712edc 100644
--- a/cloudfunctions/leaderboard/index.js
+++ b/cloudfunctions/leaderboard/index.js
@@ -107,15 +107,21 @@ exports.main = async (event) => {
 
     for (const monthKey of Object.keys(records)) {
       if (prefix && !monthKey.startsWith(prefix)) continue
-      for (const r of records[monthKey]) {
+      const arr = records[monthKey]
+      if (!Array.isArray(arr)) continue
+      for (const r of arr) {
+        // 防御脏数据:r.date 缺失/非字符串、duration 非数字时跳过,
+        // 避免单条坏记录抛 TypeError 导致整个排行榜对所有人失败
+        if (!r || typeof r.date !== 'string') continue
+        const dur = Number(r.duration) || 0
         if (period === 'day') {
           // Use startsWith rather than === to tolerate date strings with
           // trailing time/zone info (e.g. "2026-06-11T09:11:24.587Z" if
           // some legacy path stored an ISO date) and to be timezone-
           // agnostic when client local date differs from server UTC date.
-          if (r.date.startsWith(exact)) { duration += r.duration; sessions++ }
+          if (r.date.startsWith(exact)) { duration += dur; sessions++ }
         } else {
-          if (r.date.startsWith(prefix)) { duration += r.duration; sessions++ }
+          if (r.date.startsWith(prefix)) { duration += dur; sessions++ }
         }
       }
     }
diff --git a/cloudfunctions/tts/index.js b/cloudfunctions/tts/index.js
index 50a9cc5..0cbe409 100644
--- a/cloudfunctions/tts/index.js
+++ b/cloudfunctions/tts/index.js
@@ -61,8 +61,9 @@ const _synthesize = async (text, promptKey, opts) => {
   return Buffer.from(res.Audio, 'base64')
 }
 
-const _upload = async (key, buffer, voiceType) => {
-  const cloudPath = `${CACHE_DIR}/${key}-${voiceType || 'default'}.mp3`
+const _upload = async (key, buffer, voiceType, volume, speed) => {
+  // cloudPath 含 volume/speed,避免不同音量/语速的音频互相覆盖(缓存碰撞)
+  const cloudPath = `${CACHE_DIR}/${key}-${voiceType || 'default'}-v${volume != null ? volume : 0}-s${speed != null ? speed : 0}.mp3`
   // uploadFile returns the canonical fileID (e.g. "cloud://env.xxx/...").
   // We must use THAT — not the relative cloudPath we passed in — when
   // calling getTempFileURL. A self-constructed fileID is invalid.
@@ -94,7 +95,7 @@ exports.main = async (event) => {
   // Slow path: synthesize + upload + return fresh fileID for caching
   try {
     const buffer = await _synthesize(text, promptKey, { voiceType, volume, speed })
-    const newFileID = await _upload(promptKey, buffer, voiceType)
+    const newFileID = await _upload(promptKey, buffer, voiceType, volume, speed)
     const urlRes = await cloud.getTempFileURL({ fileList: [newFileID] })
     const url = urlRes.fileList[0].tempFileURL
     if (!url) {
diff --git a/pages/index/index.js b/pages/index/index.js
index 966b0ea..01d1437 100644
--- a/pages/index/index.js
+++ b/pages/index/index.js
@@ -136,7 +136,7 @@ Page({
     const plan = planMod.getPlan(settings.planId, customPlans)
     const planDay = planMod.getPlanDay(settings.planId, allRecords, settings.planStartDate, customPlans)
     const clampedDay = Math.min(planDay, plan.totalDays)
-    const target = planMod.getTodayTarget(settings.planId, clampedDay)
+    const target = planMod.getTodayTarget(settings.planId, clampedDay, customPlans)
 
     const theme = themeMod.getCurrentTheme()
     // 防御:totalDays 为 0(极端数据损坏)时避免除以 0 得到 NaN
diff --git a/pages/leaderboard/leaderboard.js b/pages/leaderboard/leaderboard.js
index 69952ac..91e2b0a 100644
--- a/pages/leaderboard/leaderboard.js
+++ b/pages/leaderboard/leaderboard.js
@@ -54,14 +54,19 @@ Page({
   },
 
   fetchRank(cb) {
+    // 序列号:快速切换周期时丢弃旧响应,避免旧 period 的数据覆盖新 period
+    this._fetchSeq = (this._fetchSeq || 0) + 1
+    const seq = this._fetchSeq
+    const period = this.data.activePeriod
     this.setData({ loading: true, empty: false })
     wx.cloud.callFunction({
       name: 'leaderboard',
       data: {
-        period: this.data.activePeriod,
+        period,
         maxRank: config.leaderboardMaxRank
       }
     }).then(res => {
+      if (seq !== this._fetchSeq) { if (cb) cb(); return }  // 过期响应,丢弃
       this._applyResult(res.result || {})
       if (cb) cb()
     }).catch((err) => {
@@ -70,6 +75,7 @@ Page({
       // normal (user didn't train today), and a toast would mislead
       // them into thinking the cloud is broken.
       console.warn('[leaderboard] cloud function failed, using local fallback:', err)
+      if (seq !== this._fetchSeq) { if (cb) cb(); return }
       this._applyLocal()
       if (cb) cb()
     })
diff --git a/pages/timer/timer.js b/pages/timer/timer.js
index f064c7b..0edbcdd 100644
--- a/pages/timer/timer.js
+++ b/pages/timer/timer.js
@@ -76,7 +76,7 @@ Page({
       const customPlans = storage.getCustomPlans()
       const plan = planMod.getPlan(settings.planId, customPlans)
       planDay = planMod.getPlanDay(settings.planId, allRecords, settings.planStartDate, customPlans)
-      target = planMod.getTodayTarget(settings.planId, Math.min(planDay, plan.totalDays))
+      target = planMod.getTodayTarget(settings.planId, Math.min(planDay, plan.totalDays), customPlans)
     }
 
     this.setData({
diff --git a/utils/plan.js b/utils/plan.js
index ff1159f..106f899 100644
--- a/utils/plan.js
+++ b/utils/plan.js
@@ -73,8 +73,8 @@ const getPlan = (planId, customPlans) => {
   return plans[planId] || plans.beginner
 }
 
-const getTodayTarget = (planId, currentDay) => {
-  const plan = getPlan(planId)
+const getTodayTarget = (planId, currentDay, customPlans) => {
+  const plan = getPlan(planId, customPlans)
   // 防御:计划数据损坏(planId 无效 / days 为空)时直接返回 0,
   // 避免 plan.days[0] 为 undefined 后访问 .target 抛出崩溃。
   if (!plan.days || plan.days.length === 0) return 0