feat(timer): 训练时长低于阈值不记录并明确提示

- config.js 新增 minRecordSeconds: 20 阈值配置，改配置即可调整门槛
- timer.js: finishTraining/_onCircuitComplete 低时长不播完成语音;
  _saveAndShowCompletion 兜底判断,任何入口都不会把短时训练落库;
  新增 _showNotRecorded: 不保存记录、不更新连胜,复用完成弹窗展示实际秒数
- timer.wxml/wxss: 完成弹窗新增"未计入记录"提示行(门槛说明),
  未记录时隐藏"查看记录/分享"按钮,只留"再来一次+回到首页"
- 修复状态残留: 未记录后点"再来一次",下次正常完成不会误显示"未计入记录"

pages/timer/timer.js

@@ -40,6 +40,10 @@ Page({
     // 组进度改由 progress-ring 外圈分段弧呈现,仅需传 sets/currentSet/resting,
     // 页面不再维护点阵渲染数据(circuitDots/dotsDone 等已随旧面板一并删除)。
     celebrationLevel: 'normal',  // normal / first / milestone / record
+    // 训练时长低于 config.minRecordSeconds 时置 true:完成弹窗提示"未计入记录",
+    // 隐藏查看记录/分享入口;弹窗内展示门槛值给用户明确反馈
+    completionNotRecorded: false,
+    minRecordSeconds: 20,
     celebrationMessage: '',
     confettiPieces: [],
     // Completion modal (full-screen summary after training ends)
@@ -435,7 +439,9 @@ Page({
   _onCircuitComplete() {
     this._clearVibrateTimers()
     const s = storage.getSettings()
-    if (s.voiceGuide !== false) voice.play('complete')
+    // 有效撑持秒数未达最低记录时长时不播完成语音(弹窗走"未计入记录"分支)
+    const minSec = config.minRecordSeconds || 20
+    if (this.data.workTotal >= minSec && s.voiceGuide !== false) voice.play('complete')
     this._saveAndShowCompletion(this.data.workTotal)
   },
 
@@ -725,8 +731,10 @@ Page({
       return
     }
     // Completion voice (replaces the old auto-onComplete cue). No vibration.
+    // 未达最低记录时长时不播完成语音——弹窗会走"未计入记录"分支,不庆祝。
     const s = storage.getSettings()
-    if (s.voiceGuide !== false) {
+    const minSec = config.minRecordSeconds || 20
+    if (elapsed >= minSec && s.voiceGuide !== false) {
       voice.play('complete')
     }
     this._saveAndShowCompletion(elapsed)
@@ -759,6 +767,15 @@ Page({
     // Re-entry guard: protects the finishTraining path so the save never
     // runs twice even if the user double-taps end.
     if (this._saving) return
+
+    // 未达 config.minRecordSeconds:不写入记录/连胜,弹"未计入记录"提示。
+    // 兜底判断——手动结束(finishTraining)与循环自然完成(_onCircuitComplete)
+    // 两条路径最终都汇聚到这里,保证任何入口都不会把短时训练落库。
+    const minSec = config.minRecordSeconds || 20
+    if (elapsed < minSec) {
+      this._showNotRecorded(elapsed, minSec)
+      return
+    }
     this._saving = true
 
     const { level, message } = this._detectCelebrationLevel(elapsed)
@@ -797,6 +814,9 @@ Page({
       // Background effects keep playing behind the modal
       status: 'completed',
       isCompleted: true,
+      // 重置未记录标记(上一轮若走了 _showNotRecorded,这里必须回 false,
+      // 否则下次正常完成的弹窗会误显示"未计入记录"且隐藏分享/记录按钮)
+      completionNotRecorded: false,
       celebrationLevel: level,
       celebrationMessage: message,
       confettiPieces,
@@ -827,6 +847,46 @@ Page({
     })
   },
 
+  /**
+   * 训练时长低于 config.minRecordSeconds:不保存记录、不更新连胜,
+   * 复用完成弹窗(避免系统原生 modal 在 WebView stacking context 下
+   * hit-test 不稳),弹窗内明确提示"本次未计入记录"。
+   * 仍显示本次实际撑持秒数(大数字 countUp),但不放 confetti/连胜/科学提示,
+   * 并隐藏"查看记录/分享"入口(没有记录可看)。
+   */
+  _showNotRecorded(elapsed, minSec) {
+    if (this._saving) return
+    this._saving = true
+
+    this.setData({
+      status: 'completed',
+      isCompleted: true,
+      completionNotRecorded: true,
+      minRecordSeconds: minSec,
+      showCompletion: true,
+      completionElapsed: 0,
+      completionActualElapsed: elapsed,
+      completionTarget: this.data.duration,
+      completionOvertime: 0,
+      completionStreak: 0,
+      completionLevel: 'normal',
+      completionMessage: '未达最低记录时长',
+      completionTipValue: '',
+      completionTipRisk: '',
+      confettiPieces: []
+    })
+
+    // Animate the big number from 0 to elapsed (same as the normal modal)
+    if (this._completionCountUp) this._completionCountUp.cancel()
+    this._completionCountUp = countUp({
+      from: 0,
+      to: elapsed,
+      duration: 1200,
+      onUpdate: (v) => this.setData({ completionElapsed: v }),
+      onComplete: () => { this._completionCountUp = null }
+    })
+  },
+
   onCloseCompletion() {
     if (this._completionCountUp) {
       this._completionCountUp.cancel()
@@ -882,6 +942,8 @@ Page({
       status: 'idle',
       isRunning: false,
       isPaused: false,
+      // 复位未记录标记:若上一轮走了 _showNotRecorded,重练前必须回 false
+      completionNotRecorded: false,
       remaining: this.data.duration,
       elapsed: 0,
       goalReached: false,