feat(media): 批3歌词数据源框架 — meow_media_session扩实时歌词(lrc/tlrc/seq)+MSG_META_LYRIC上报分片+ncm上报+launcher读meow_media_lyric_* 接批1/2;宿主L1-L7全过/ncm热更27554dd8,launcher待固件收编

patch_v2/meow_launcherd/util.c

@@ -1633,6 +1633,22 @@ static void ipc_dispatch(struct meow_ipc_msg *m)
                (long long)c.seek_ms, rc);
         break;
     }
+    /* 阶段D·批3：媒体会话歌词上报（App 播放时把 lrc/tlrc 上报到会话）。分片经
+     * meow_media_lyric 归并（有界缓冲+seq 代际）；回 ACK。 */
+    case MSG_META_LYRIC: {
+        m_lyric_t l;
+        memset(&l, 0, sizeof l);
+        memcpy(&l, m->payload, m->plen < (uint16_t)sizeof l ? m->plen : (uint16_t)sizeof l);
+        l.app_id[MEOW_APP_ID_MAX - 1] = 0;
+        int rc = meow_media_lyric(&l);
+        m_ack_t a;
+        a.code = MEOW_OK;              /* 会话策略：无会话丢弃（rc=-1），不视为错误 */
+        a.status = (uint32_t)rc;
+        ipc_send(m->fd, MSG_ACK, m->req_id, &a, sizeof a);
+        logmsg("ipc: META_LYRIC app=%s kind=%u seq=%u total=%u off=%u len=%u rc=%d -> ACK",
+               l.app_id, l.kind, l.seq, l.total, l.off, l.len, rc);
+        break;
+    }
     default:
         logmsg("ipc: unsupported frame type 0x%04x (req %u)", m->type, m->req_id);
         {