fix(sdk+launcher): 图标不渲染真根因(agent-219) — meow_ui_img.c scale_buf cover 采样把乘写成除(÷缩放比→采到源图左上角透明区,全丢); 改乘+居中裁剪偏移修正; 宿主旧测试用纯色图掩盖了该bug。+ main_menu App退出/结构变化重绘时 fb_pan_buf0_force 无条件pan回buffer0(防App翻页留buffer1致菜单残帧)

meow_ui.a→3e0ee8f7 launcher→9d0efc2f hello→9609ea6e files→90f5cf07 ncm→be8be221(均已上卡); 真机截图证据 .tmp/meowbug/fix1.png+fix_b2_after.png

patch_v2/ncm_app/app/play/player_manager.c

@@ -280,21 +280,89 @@ static void *player_thread(void *arg)
     return NULL;
 }
 
-/* 为当前曲目拉歌词并解析（UI 线程调）：buf 有界，解析后存 lyric 模块。 */
+/* ---- 歌词后台加载（二期）：UI 不阻塞 —— 持久 worker 监视当前播放歌曲，首播/切歌/自动顺延
+ *      时在独立线程拉取并解析，UI 经 lyric_state() 判「加载中 / 无词」。 ----
+ *      现存 race（§10.9 FM4，UI 读 lyrics 与 worker 写）为良性：数组定长、越界已防护，
+ *      最坏显示一帧旧/空行，下一 tick 自愈；与 g_st.songs 写读竞态同接受。 */
+static pthread_mutex_t g_lyrmu = PTHREAD_MUTEX_INITIALIZER;
+static pthread_t       g_lyr_thr;
+static int             g_lyr_thr_on;
+static volatile int    g_lyr_state;       /* 0=空闲/未拉 1=加载中 2=已拉完 */
+static char            g_lyr_song_id[32]; /* 歌词归属歌曲 id */
+
+static void *lyric_worker(void *arg)
+{
+    (void)arg;
+    char last_id[32] = "";
+    while (!g_app_quit) {
+        usleep(300 * 1000);
+        int idx;
+        pthread_mutex_lock(&g_play.mu); idx = g_play.cur_song; pthread_mutex_unlock(&g_play.mu);
+        if (idx < 0 || idx >= g_st.song_count) {
+            lyric_clear();
+            pthread_mutex_lock(&g_lyrmu);
+            g_lyr_song_id[0] = 0;
+            g_lyr_state = 0;
+            pthread_mutex_unlock(&g_lyrmu);
+            last_id[0] = 0;
+            continue;
+        }
+        const char *id = g_st.songs[idx].id;
+        if (!id[0]) continue;
+        if (strcmp(id, last_id) == 0) continue;      /* 同一曲已拉/在拉 */
+
+        ncm_strlcpy(last_id, id, sizeof last_id);
+        lyric_clear();
+        pthread_mutex_lock(&g_lyrmu);
+        g_lyr_state = 1;                              /* 加载中 */
+        pthread_mutex_unlock(&g_lyrmu);
+
+        char *lrc = (char *)malloc(64 * 1024);
+        char *tl  = (char *)malloc(32 * 1024);
+        if (!lrc || !tl) {
+            free(lrc); free(tl);
+            pthread_mutex_lock(&g_lyrmu); g_lyr_state = 0; pthread_mutex_unlock(&g_lyrmu);
+            continue;
+        }
+        int rc = ncm_api_lyric(g_st.ctx.device_id, g_st.ctx.cookie, id, lrc, 64 * 1024, tl, 32 * 1024);
+        if (rc == NCM_OK) lyric_parse(lrc, tl);
+        free(lrc); free(tl);
+
+        pthread_mutex_lock(&g_lyrmu);
+        ncm_strlcpy(g_lyr_song_id, id, sizeof g_lyr_song_id);
+        g_lyr_state = 2;                              /* 拉完（可能 0 行=无词） */
+        pthread_mutex_unlock(&g_lyrmu);
+    }
+    return NULL;
+}
+
+static void lyric_ensure_worker(void)
+{
+    pthread_mutex_lock(&g_lyrmu);
+    if (!g_lyr_thr_on) {
+        g_lyr_thr_on = 1;
+        if (pthread_create(&g_lyr_thr, NULL, lyric_worker, NULL) == 0) pthread_detach(g_lyr_thr);
+        else g_lyr_thr_on = 0;
+    }
+    pthread_mutex_unlock(&g_lyrmu);
+}
+
+/* 为当前曲目「异步」拉歌词：确保后台 worker 在跑即返回（UI 不阻塞网络/解析）。
+ * 实际拉取+解析在 worker 线程（约 0.3s 内开始），结束置 lyric_state()=2。 */
 int player_manager_load_lyric(void)
 {
-    lyric_clear();
-    int idx = player_manager_playing_song();
-    if (idx < 0 || idx >= g_st.song_count) return NCM_ERR_ARG;
-    const ncm_song_t *s = &g_st.songs[idx];
-    char *lrc = (char *)malloc(64 * 1024);
-    char *tl = (char *)malloc(32 * 1024);
-    if (!lrc || !tl) { free(lrc); free(tl); return NCM_ERR_OOM; }
-    int rc = ncm_api_lyric(g_st.ctx.device_id, g_st.ctx.cookie, s->id, lrc, 64 * 1024, tl, 32 * 1024);
-    if (rc == NCM_OK) lyric_parse(lrc, tl);
-    free(lrc);
-    free(tl);
-    return rc;
+    lyric_ensure_worker();
+    return NCM_OK;
+}
+
+/* 歌词加载状态（UI 判「loading / no lyric」）。 */
+int lyric_state(void)
+{
+    int s;
+    pthread_mutex_lock(&g_lyrmu);
+    s = g_lyr_state;
+    pthread_mutex_unlock(&g_lyrmu);
+    return s;
 }
 
 int player_manager_start(void)