ncm search: 历史+单曲/歌单分类+分页+误触修复+不覆写歌单上下文 (§23)

- 搜索历史：进页自动弹键盘；meow_config 持久化 ≤12 去重最新在前；空态=历史列表(点搜/左滑删/清空)
- 结果分类单曲/歌单页签：独立结果集+独立滚动；歌单行进详情(playlist_open_pl)；单曲行播放
- 触底分页：offset 累加 limit=30/页 cloudsearch 同参数；每类各记 offset
- 误触抑制：g_press_row + g_press_delta>10（对齐 home/playlist §13.3）
- 结果改独立数组(不写 g_st.songs[])；播放搜索单曲建搜索队列(queue_src=SEARCH)，不弄丢歌单窗口
- core cloudsearch 扩展 type/offset/limit/total + 歌单解析
- bench/search_sim.c 离线回归(历史/独立集/翻页 offset/队列上下文)；host searchtap 误触自检

验证：mipsel -Wall -Wextra 0 warning；core host/mipsel PASS；search_sim PASS；
宿主离屏 search(单曲)/searchpl(歌单)/searchhist(空态历史)/searchtap(误触) 均正常；0 真实 NCM 请求。

patch_v2/ncm_app/app/play/player_manager.c

@@ -126,7 +126,8 @@ void player_manager_next(int dir)
     pthread_mutex_lock(&g_play.mu);
     int c = g_play.cur_song + dir;
     if (c < 0) c = 0;
-    if (c >= g_st.track_ids_count) c = g_st.track_ids_count - 1;   /* 滑窗：边界=全量索引数 */
+    int cnt = appstate_queue_count();   /* §23：按队列来源（窗口全量 或 搜索条数） */
+    if (c >= cnt) c = cnt - 1;
     if (c != g_play.cur_song) {
         g_play.cur_song = c;
         g_play.cmd = 0;
@@ -387,9 +388,9 @@ static void run_song(int idx)
     /* §17 滑窗兼容：物化目标曲（窗内命中 / 盘缓存 / song_detail 单曲）并整体快照进
      * g_play.play_song——之后本曲所有字段读快照，窗口滑出当前播放曲不影响播放。 */
     ncm_song_t s;
-    if (appstate_song_copy(idx, &s) != 0) {
-        int fr = appstate_song_fetch(idx, &s);
-        if (fr != NCM_OK) { set_err(fr, "load failed"); return; }
+    if (appstate_queue_song(idx, &s) != 0) {   /* §23：按 queue_src 取（窗口 或 搜索队列） */
+        set_err(NCM_ERR_ARG, "load failed");
+        return;
     }
     if (!still_current(idx)) return;             /* 物化期间已切歌/停止：不写过期快照 */
     pthread_mutex_lock(&g_play.mu);
@@ -571,7 +572,7 @@ static void *player_thread(void *arg)
         int st  = g_play.state;
         pthread_mutex_unlock(&g_play.mu);
 
-        if (cur < 0 || cur >= g_st.track_ids_count || st == NCM_PC_STOPPED) {
+        if (cur < 0 || cur >= appstate_queue_count() || st == NCM_PC_STOPPED) {
             usleep(60 * 1000);
             continue;
         }
@@ -583,9 +584,10 @@ static void *player_thread(void *arg)
         int st2  = g_play.state;
         pthread_mutex_unlock(&g_play.mu);
         /* 自然播完且无新命令 → 顺延下一首；否则回到循环等待 */
-        if (cur2 >= 0 && cur2 < g_st.track_ids_count && st2 != NCM_PC_STOPPED && cur2 == cur) {
+        int qc = appstate_queue_count();
+        if (cur2 >= 0 && cur2 < qc && st2 != NCM_PC_STOPPED && cur2 == cur) {
             int nx = cur + 1;
-            if (nx < g_st.track_ids_count) { player_manager_next(1); }
+            if (nx < qc) { player_manager_next(1); }
             else { player_manager_stop(); }
         } else {
             usleep(50 * 1000);
@@ -616,7 +618,7 @@ static void *lyric_worker(void *arg)
         int have = g_play.play_song_valid;
         ncm_strlcpy(id, have ? g_play.play_song.id : "", sizeof id);
         pthread_mutex_unlock(&g_play.mu);
-        if (idx < 0 || idx >= g_st.track_ids_count || !have) {
+        if (idx < 0 || idx >= appstate_queue_count() || !have) {
             lyric_clear();
             pthread_mutex_lock(&g_lyrmu);
             g_lyr_song_id[0] = 0;