feat(launcher): 媒体会话+Now Playing (agent-204) — MSG_META(0x72)/MSG_PLAYCTL(0x73)+meow_media.c(最近活跃源=active_seq净序,30s超时回收); 通知中心顶部媒体卡片(封面缓存+进度seek+控制键); 主界面中部/右缘左滑进 Now Playing 大页(封面+元数据+进度+控制+歌词占位), 左缘返回; 空态完备

launcher a42171a1→ddfe616e; 宿主 test_media ALL PASS + qemu 端到端(META注册→PLAYCTL下发闭环)
出入: 卡片以媒体会话为权威非通知; PLAYCTL 走会话fd(断连防御留后续)

patch_v2/meow_launcherd/build_launcher.sh

@@ -25,9 +25,9 @@ SYSROOT="$ROOT/.tools/mipsel-linux-muslsf-cross/mipsel-linux-muslsf"
 "$CC" -I"../sdk" -Os -static \
     main_menu.c statusbar.c fb_compositor.c settings_page.c power_menu.c \
     notif_center.c app_launcher.c audio.c backlight.c net.c about.c \
-    subpage.c wifi_page.c bt_page.c \
+    subpage.c wifi_page.c bt_page.c now_playing.c \
     font_theme.c keys.c util.c \
-    meow_touch.c meow_settings.c meow_notif.c \
+    meow_touch.c meow_settings.c meow_notif.c meow_media.c \
     "../sdk/meow_ui.a" "$SYSROOT/lib/libz.a" -lpthread -o meow_launcherd
 echo "== meow_launcherd =="
 ls -la meow_launcherd