fix(ncm): 启动卡顿+大歌单+No tracks 三连修 (agent-209) — ①home/playlist 加载改后台 worker ②大歌单 detail n=1(tracks瘦身)+响应cap 2MB ③song_detail c数组引号转义 ④P0: MIPS32 long=32位歌曲id溢出→int64 ⑤eapi批缓冲2048→4096

ncm→f6bd765a 已部署; 真机验证(风控合规): 小歌单✓ 大歌单256首✓ 启动不卡✓; 已知: 大歌单首屏~30s(二期改分页端点)

patch_v2/ncm_app/app/ui/home.c

@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <pthread.h>
 
 typedef struct { meow_view *view; int active; } home_ctrl;
 static home_ctrl g_hc;
@@ -18,9 +19,19 @@ static meow_widget *g_list;
 static ncm_rect_t   r_cont, r_list;
 static int          g_empty_id, g_footer_id;
 static char         g_title[128];
-static int          g_load_err;      /* 0=ok；负=错误码 */
+static volatile int g_load_err;      /* 0=ok；负=错误码（worker 写，UI draw 读） */
 static int          g_press_row, g_press_delta, g_dragging, g_drag_last_y;
 
+/* 歌单加载后台 worker：网络（ensure_uid + user_playlist）从 UI 线程挪出，
+ * 使冷启动/进 home 立即出界面，再异步填列表。gen 代际作“完成”信号（对齐 cover.c）。
+ * 单核 MIPS，gen 在数据写完后置位，UI 见 gen 变化才重建列表，避免半成品。 */
+static pthread_mutex_t g_home_mu = PTHREAD_MUTEX_INITIALIZER;
+static pthread_t       g_home_thr;
+static int             g_home_thr_on;    /* 1=worker 在跑（防重复 spawn） */
+static volatile int    g_home_gen;       /* worker 完成代数 */
+static int             g_home_acked;     /* UI 已消费的代数 */
+static volatile int    g_home_loading;   /* 1=加载中（draw 显示 LOADING） */
+
 static void home_drag_reset(void)
 {
     g_press_row = -1;
@@ -52,6 +63,10 @@ static void home_draw_empty(void *ctx)
     (void)ctx;
     if (meow_ui_activity_active() != ACT_HOME) return;
     if (g_load_err == 0 && g_st.playlist_count != 0) return;
+    if (g_home_loading) {
+        ncm_draw_empty(r_list, "LOADING", "fetching playlists...");
+        return;
+    }
     if (g_st.logged_in == 0)
         ncm_draw_empty(r_list, "NOT SIGNED IN", "sign in first");
     else if (g_load_err == NCM_ERR_AUTH)
@@ -76,16 +91,9 @@ static void home_draw_footer(void *ctx)
     ncm_draw_footer(r_cont, foot);
 }
 
-void home_reload(void)
+/* 把当前 playlist_count/昵称刷进列表 + 标题，并整帧重绘（UI 线程）。 */
+static void home_apply(void)
 {
-    g_load_err = 0;
-    int rc = 0;
-    if (g_host_mock) {                       /* 宿主/测试：跳过网络，用预置数据 */
-        rc = 0;
-    } else if (!g_st.logged_in) rc = NCM_ERR_AUTH;
-    else rc = appstate_load_playlists();
-    g_load_err = rc;
-    if (g_load_err != 0) g_st.playlist_count = 0;
     if (g_list) {
         meow_listview_set_count(g_list, g_st.playlist_count);
         meow_listview_set_scroll(g_list, 0);
@@ -99,6 +107,54 @@ void home_reload(void)
     meow_ui_paint_full();
 }
 
+/* 后台 worker：唯一走网络的地方（ensure_uid + user_playlist），UI 线程不阻塞。 */
+static void *home_worker(void *arg)
+{
+    (void)arg;
+    int rc;
+    if (!g_st.logged_in) rc = NCM_ERR_AUTH;
+    else rc = appstate_load_playlists();
+    pthread_mutex_lock(&g_home_mu);
+    g_load_err = rc;
+    g_home_loading = 0;
+    g_home_gen++;
+    pthread_mutex_unlock(&g_home_mu);
+    return NULL;
+}
+
+void home_reload(void)
+{
+    if (g_host_mock) {                       /* 宿主/测试：跳过网络，用预置数据（同步） */
+        g_load_err = 0;
+        if (g_load_err != 0) g_st.playlist_count = 0;
+        home_apply();
+        return;
+    }
+    if (g_home_thr_on) return;               /* 已有 worker 在跑，忽略重复触发 */
+    g_load_err = 0;
+    g_st.playlist_count = 0;                 /* 清旧数据，先画 LOADING，worker 完成后回填 */
+    g_home_loading = 1;
+    g_home_thr_on = 1;
+    if (pthread_create(&g_home_thr, NULL, home_worker, NULL) != 0) {
+        g_home_thr_on = 0;
+        g_home_loading = 0;
+        g_load_err = NCM_ERR_IO;
+    }
+    home_apply();                            /* 先画（LOADING/空态），不等网络 */
+}
+
+/* UI tick：worker 完成（gen 变化）后重建列表并重绘。 */
+void home_tick(uint64_t now)
+{
+    (void)now;
+    if (!g_home_thr_on) return;
+    if (g_home_gen == g_home_acked) return;
+    g_home_acked = g_home_gen;               /* 消费本次完成 */
+    g_home_thr_on = 0;                       /* worker 已结束，可再次 reload */
+    g_home_loading = 0;
+    home_apply();
+}
+
 int home_is_active(void) { return g_hc.active; }
 
 int home_on_tap(int x, int y)