feat: M6.10–M6.19 批量收编 + M6.19 推卡验收

- M7 launcher 重写 5 期（虚拟化宫格/meow_theme 单一权威/横幅动画/自定义 PIN 键盘）
- OOM 通用化（cachegov 上收 SDK）、自动切歌根治、meowpanel jv_free 泄漏修复、Hello 滚动卡顿修复
- ncm 歌词 UI / 媒体通知封面 / 封面分辨率 640
- 5 bug 修复：ncm 后台化 UI 叠层+点击穿透、再进 ncm 桌面叠层、播放页新旧 UI 叠层抢刷脏区（meow_ui_gfx 恢复边沿整帧重画）、PIN 亮屏亮度跳（keys.c meow_panel_on 按 settings_brightness_clamped 恢复）、通知中心封面显歌单封面（cover.c save_cover_raw 加 is_song + 命中块守卫）
- 四 App 统一重链新 meow_ui.a 51caee4a；M6.19=0.8.19 固件 2d2331f2 推卡自刷验收全绿

patch_v2/ncm_app/build_ncm_sims.sh

@@ -49,9 +49,21 @@ gcc -O2 -ffunction-sections -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd \
     -Icore -Ivendor/jsmn -Ivendor/mbedtls/include -Ivendor/minimp3 -Ivendor/dr_flac -Ivendor/mbedtls/include -c app/play/player_manager.c -o /tmp/pf_pm.o
 gcc -O2 -ffunction-sections -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd \
     -Icore -c app/play/stream_src.c -o /tmp/pf_ss.o
-gcc -O2 -Wl,--gc-sections -o player_flow_sim /tmp/pf.o /tmp/pf_pm.o /tmp/pf_ss.o -lpthread -lm
+gcc -O2 -ffunction-sections -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd \
+    -Icore -c app/play/mem_watch.c -o /tmp/pf_mw.o   # player_manager 引用（边播边监控取证，agent 32bit OOM）
+gcc -O2 -ffunction-sections -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd -Icore \
+    -c ../sdk/meow_cachegov.c -o /tmp/pf_cg.o        # player_manager 引 meow_cachegov_*（page-cache 治理 A）
+gcc -O2 -Wl,--gc-sections -o player_flow_sim /tmp/pf.o /tmp/pf_pm.o /tmp/pf_ss.o /tmp/pf_mw.o /tmp/pf_cg.o -lpthread -lm
 run_sim player_flow_sim
 
+echo "==> build mem_watch_sim（边播边监控阈值/滞回/调度器，宿主桩驱动；agent 32bit OOM。"
+echo "    mem_release_sim 无累积断言在 bench/ 头注释手动构建：需预生成 24bit flac 素材）"
+gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd \
+    -c bench/mem_watch_sim.c -o /tmp/mw.o
+gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -I../sdk -c app/play/mem_watch.c -o /tmp/mw_mod.o
+gcc -O2 -o mem_watch_sim /tmp/mw.o /tmp/mw_mod.o -lpthread -lm
+run_sim mem_watch_sim
+
 echo "==> build window_sim"
 gcc -O2 -ffunction-sections -DJSMN_HEADER -I. -I../sdk -I../meow_launcherd -Icore -Ivendor/jsmn -Ivendor/mbedtls/include \
     -c bench/window_sim.c -o /tmp/ws.o
@@ -113,4 +125,14 @@ gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -Iapp -Icore -I../sdk -I../meow_launcher
 gcc -O2 -o account_cookie_sim /tmp/acs.o /tmp/acs_account.o -lpthread -lm
 run_sim account_cookie_sim
 
+echo "==> build http_truncate_sim (ncm_http 截断守卫宿主测试；mock mbedtls 传输层，0 真实网络)"
+gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -Icore -Ivendor/mbedtls/include \
+    -c bench/http_truncate_sim.c -o /tmp/t.o
+gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -Icore -Ivendor/mbedtls/include \
+    -ffunction-sections -c core/ncm_http.c -o /tmp/t_http.o
+gcc -O2 -Wall -Wextra -DJSMN_HEADER -I. -Icore -Ivendor/mbedtls/include \
+    -ffunction-sections -c core/ncm_common.c -o /tmp/t_common.o
+gcc -Wl,--gc-sections -o http_truncate_sim /tmp/t.o /tmp/t_http.o /tmp/t_common.o
+run_sim http_truncate_sim
+
 echo "===== all sims done ====="