fix: universal outro all-green LED; expert local song keeps playing after section+fret

Keep fretboard LEDs all green during outro, and for expert local songs treat section-key + fret changes as continuous chord updates like rhythm mode (no mid-session Stop).

Co-authored-by: Cursor <cursoragent@cursor.com>

Global/Global.c

@@ -612,6 +612,9 @@ void Accomp_UpdatePlayingChord(void)
     AutoBandTop1_Note_On(midi_note_buff[i], 0x50);
 }
 
+/* 尾奏期间冻结走向灯：保持全绿，避免 LOOP_LIGHT 按小节刷红 */
+static uint8_t s_outro_led_all_green = 0;
+
 /* 尾奏起奏：Postamble(0) + 同步起奏 + 当前和弦 Note_On。
  * 供 ADC 独立尾奏键与万能模式第4段落键共用。
  * 万能走 piece 循环，须先退出 piece，否则 Postamble 舞台切不过去；
@@ -627,6 +630,9 @@ void AutoBand_StartOutro(void)
   /* 退出和弦走向 piece，再进风格尾奏舞台 */
   AutoBandTop1_SetPiecePlayMode(0, 0, 0);
   AutoBandTop1_Postamble(0);
+  /* 尾奏：指板 LED 全绿（停走 LOOP 走向红灯） */
+  s_outro_led_all_green = 1;
+  app_tm1629_all_on(LED_COLOR_G);
   /* 尾奏起奏前补发主音量，保证与图标一致 */
   MasterVolume_Reapply();
   AutoBandTop1_SyncStart();
@@ -654,6 +660,7 @@ void ADC_IN1_KEY_Handle(uint8_t key,bool on)
       }
       else
       {
+          s_outro_led_all_green = 0; /* 前奏/断奏：恢复走向灯 */
           switch(key)
           {
               case 3: AutoBandTop1_Preamble(0);  is_preamble = 1; break;
@@ -765,6 +772,7 @@ void Stop_AutoBand()
     SendMidiDataToDreamDSP(AllControlOff_buff,sizeof(AllControlOff_buff));
   }
   StartFlag = 0;
+  s_outro_led_all_green = 0;
   //tick_ever_positive = false;
   for(uint8_t i = 0;i < 4;i++) key_toggle[i] = 0;
 }
@@ -826,6 +834,15 @@ void Band_TrackPlayTick(void)
   }
 }
 
+/* 段落键 SetRunVar 后 PlayTick 可能短暂不变；主动刷新以免误判为已停。 */
+void Band_NotifyPlayActivity(void)
+{
+  if (!StartFlag)
+    return;
+  s_play_tick_last = AutoBandTop1_GetCurrentPlayTick();
+  s_play_adv_tick  = rt_tick_get();
+}
+
 uint8_t Band_IsPlaying(void)
 {
   if (!StartFlag || s_play_adv_tick == 0)
@@ -839,16 +856,21 @@ static void Expert_StartWithChord(uint8_t chord_id, uint8_t *midi_note_buff,
                                   uint8_t note_cnt, const char *trigger)
 {
   uint8_t midi = 0;
+  uint8_t session = StartFlag ? 1u : 0u;
 
   StartFlag = 1;
   if (mGuiData[GUI_AUTOBAND_SW].Current)
   {
-    AutoBandTop1_Stop();
+    /* 会话内勿 Stop：段落圆键切变奏后指板续奏若 Stop 会直接关音；
+     * 与节奏类型一致，仅换和弦/重进当前段。冷启动仍 Stop 清残留。 */
+    if (!session)
+      AutoBandTop1_Stop();
     AutoBandTop1_SetLoopMode(0, 1);
     AutoBandTop1_SetRunVar(mGuiData[GUI_PLAY_SECTION].Current);
     midi = 0x3C + mGuiData[GUI_TRANSPOSE].Current;
     AutoBandTop1_StartWithNote(midi);
     AutoBandTop1_StartWithNotes(midi_note_buff, note_cnt);
+    Band_NotifyPlayActivity();
     LOG_I("pick", "local/expert root=%u name=%s sw=%u tab=%u trigger=%s chord=%u",
           midi,
           AutoBandTop1_GetPresetName() ? AutoBandTop1_GetPresetName() : "?",
@@ -862,6 +884,7 @@ static void Expert_StartWithChord(uint8_t chord_id, uint8_t *midi_note_buff,
     AutoBandTop1_SetPiecePlayMode(1, 0, 1920);
     AutoBandTop1_StartWithNotes(midi_note_buff, note_cnt);
     AutoBandTop1_SetLoopMode(0, 1);
+    Band_NotifyPlayActivity();
     LOG_I("pick", "expert/rhythm piece name=%s trigger=%s chord=%u",
           AutoBandTop1_GetPresetName() ? AutoBandTop1_GetPresetName() : "?",
           trigger,
@@ -958,11 +981,24 @@ void TM1629_Handle(uint8_t key)
              * 松手再按同一键也必须能续奏（与「指板+拨片」一致，拨片本无去重） */
             if (!Band_IsPlaying())
             {
-                /* 段落已停：仅按指板续奏下一节。转主任务走 Pick_Handle
+                /* 节奏：段落自然停后指板续奏 → piece 重启。
-                 *（与「指板+拨片」等价）。勿在播放中 Stop+Start——本地曲目
+                 * 本地曲：圆键切段后 PlayTick 常短暂停滞，若走 Stop+Start 会关音；
-                 * 中途重启常静音，表现为换把位关音、再按才有声。 */
+                 * 与节奏「播放中换把」一致，仅换和弦音持续播放。段落后续奏用拨片/再按圆键。 */
-                MainTask_Sendmsg(MSG_ID_BP_KEY, 0, 0, 0);
+                if (mGuiData[GUI_AUTOBAND_SW].Current)
-                LOG_I("pick", "expert/fret continue chord=%u", (unsigned)KEY_ID_1629);
+                {
+                    uint8_t midi_note_buff[4] = {0,};
+                    uint8_t note_cnt = GetChordNotesByType(KEY_ID_1629,chord_type_index_map[KEY_ID_1629].type,midi_note_buff);
+                    for(uint8_t i = 0;i < note_cnt;i++)
+                      AutoBandTop1_Note_On(midi_note_buff[i],0x50);
+                    Return_Light_buff(KEY_ID_1629);
+                    Band_NotifyPlayActivity();
+                    LOG_I("pick", "expert/fret change(local) chord=%u", (unsigned)KEY_ID_1629);
+                }
+                else
+                {
+                    MainTask_Sendmsg(MSG_ID_BP_KEY, 0, 0, 0);
+                    LOG_I("pick", "expert/fret continue chord=%u", (unsigned)KEY_ID_1629);
+                }
             }
             else
             {
@@ -1120,6 +1156,7 @@ void Pick_Handle()
       case 0:
          /* 万能：和弦走向用 piece 模式；须 SetLoopMode，否则无循环时常听不到伴奏 */
          StartFlag = 1;
+         s_outro_led_all_green = 0; /* 拨片重开 piece，恢复走向灯 */
          AutoBandTop1_SetPiecePlayMode(1, 0, 480);
          AutoBandTop1_StartWithNotes(midi_note_buff, note_cnt);
          AutoBandTop1_SetLoopMode(0, 1);
@@ -1601,7 +1638,8 @@ void Read_Cur_Measure()
 
   Band_TrackPlayTick();
 
-  if (loop_light_ok && StartFlag)
+  /* 尾奏中保持全绿，不刷新和弦走向红灯 */
+  if (loop_light_ok && StartFlag && !s_outro_led_all_green)
   {
      if(now - last_tick_i >= 10)
      {

Global/Global.h

@@ -238,6 +238,8 @@ void BL_Set_led(uint8_t Led, uint8_t chord_type);
 uint8_t GetChordNotesByType(uint8_t MIDI_Index,uint8_t type,uint8_t *buff);
 /* 伴奏已在播时仅更新和弦音，不 Restart（快转调） */
 void Accomp_UpdatePlayingChord(void);
+/* 段落键等主动刷新伴奏活动，避免 PlayTick 短暂停滞被判为已停 */
+void Band_NotifyPlayActivity(void);
 void BT_Chord_offset_map(uint8_t pos_offset,uint8_t chord_offset);
 void BT_Pitch_offset_map(uint8_t pos_offset,uint8_t pitch_offset);
 void Read_Cur_Measure();

UI/UI_SongMode.c

@@ -277,13 +277,18 @@ void Touch_Action(int8_t FLAG, uint8_t ID, uint8_t areaIndex,uint8_t value)
         if(mGuiData[ID].Current != value)
         {
           mGuiData[ID].Current = value;
-          AutoBandTop1_SetRunVar(mGuiData[ID].Current); 
+          AutoBandTop1_SetRunVar(mGuiData[ID].Current);
+          /* 专业本地曲：切段后 PlayTick 可能短暂不变，刷新活动以免随后指板误走 Stop */
+          if (StartFlag)
+            Band_NotifyPlayActivity();
         }else
         {
           /* 触摸起奏前补发主音量，保证实际音量与图标一致 */
           MasterVolume_Reapply();
           AutoBandTop1_FillinWithIndex(value);
           AutoBandTop1_Start();
+          if (StartFlag)
+            Band_NotifyPlayActivity();
         }
         if (!UI_SetFocus(GUI_PLAY_SECTION))
             Refresh_SectionSelect(last_value, &UI_Label[ID], &mGuiData[ID]);