fix(ncm): 歌单详情LoadFailed——track/all端点不存在(404)回退detail+分批song_detail已验证链路; 列表误触改按下锁定行+拖动抑制 (agent-227, 真机验证256首出曲) + perf(meowpanel): 屏幕帧整数定点DCT(无FPU软浮点3.96s→0.19s/帧,实测4-5fps)+前端链式轮询防堆积+实测fps显示 (agent-228)

ncm→73422166 已部署; meowpanel→f310a00e 已部署

patch_v2/ncm_app/bench/probe_fix.c

@@ -0,0 +1,52 @@
+/* probe_fix.c — 真机验证修复：复刻 appstate_load_playlist_songs_page(offset=0) 的完整数据路径
+ *   /api/v6/playlist/detail(trackIds) → /api/v3/song/detail 分批 → 打印曲目。
+ * 与 App 相同的 core 调用（App 端 appstate 修复即按此路径）。请求量：detail 1 + song_detail 1 = 2。
+ * 用法: probe_fix <data_dir> <cacert> <playlist_id>
+ */
+#include "ncm.h"
+#include "ncm_api.h"
+#include "ncm_common.h"
+#include "ncm_http.h"
+#include <stdio.h>
+#include <string.h>
+
+static ncm_ctx_t ncm_ctx;
+
+int main(int argc, char **argv)
+{
+    const char *data_dir = argc > 1 ? argv[1] : "/usr/data/mnt/sd_0/MeowData/dev.player.ncm/data";
+    const char *cacert   = argc > 2 ? argv[2] : "/usr/data/mnt/sd_0/MeowAPPs/dev.player.ncm/cacert.pem";
+    const char *pid      = argc > 3 ? argv[3] : "18206253175";
+    ncm_ctx_init(&ncm_ctx, data_dir);
+    printf("device_id=%s cookie_len=%zu\n", ncm_ctx.device_id, strlen(ncm_ctx.cookie));
+    ncm_http_set_verify_default(1, cacert);
+
+    int64_t ids[256]; int idn = 0;
+    long t0 = (long)ncm_now_ms();
+    int rc = ncm_api_playlist_detail(ncm_ctx.device_id, ncm_ctx.cookie, pid,
+                                     NULL, 0, NULL, 0, ids, 256, &idn);
+    long dt = (long)ncm_now_ms() - t0;
+    printf("detail rc=%d elapsed_ms=%ld idn=%d ids[0]=%lld\n", rc, dt, idn, idn>0?(long long)ids[0]:-1);
+    if (rc != NCM_OK) { printf("FIX VERIFY FAILED (detail)\n"); return 1; }
+
+    ncm_song_t songs[256]; memset(songs, 0, sizeof songs);
+    int outn = 0;
+    for (int off = 0; off < idn; off += 64) {
+        int batch = idn - off; if (batch > 64) batch = 64;
+        int bn = 0;
+        t0 = (long)ncm_now_ms();
+        rc = ncm_api_song_detail(ncm_ctx.device_id, ncm_ctx.cookie, &ids[off], batch,
+                                 &songs[off], 256 - off, &bn);
+        printf("  song off=%d batch=%d rc=%d elapsed_ms=%ld bn=%d\n", off, batch, rc,
+               (long)ncm_now_ms() - t0, bn);
+        if (rc != NCM_OK) break;
+        outn += bn;
+        if (bn < batch) break;
+    }
+    printf("RESULT song_count=%d\n", outn);
+    if (outn > 0)
+        printf("  [0] %s / %s / %s\n", songs[0].name, songs[0].art_name, songs[0].album_name);
+    if (rc != NCM_OK || outn == 0) { printf("FIX VERIFY FAILED (songs)\n"); return 1; }
+    printf("FIX VERIFY OK\n");
+    return 0;
+}