M2.60→M2.61 骨架: SDK Activity 栈 + 控件归属(agent-122) + 按钮去圈/即时重绘(agent-119) + SDK 模板文档(agent-121)

- SDK §6.1 三层控件模型: Activity栈(push/pop/active) + 页面控件归属 owner + meow_ui_global_* 骨架(②) + 系统级仅内部接口(③)
- meow_widget 加 owner; live_btn_hit/meow_widget_hit 仅 active activity 命中; touch_refresh stale 保护
- 根治"全屏页触摸主页按钮闪现"(跨页面控件残留); 控件对象复用弹栈不重建
- hello 迁移双 Activity(home/full): 全屏左滑=弹栈回主页, 根左滑=退出
- agent-119 按钮去圈(纯色accent+黑12/24%)+即时局部重绘保留; agent-121 SDK模板§5.3-5.7

patch_v2/sdk/build_sdk.sh

@@ -10,7 +10,7 @@ AR="${AR:-/usr/bin/ar}"   # 系统 GNU ar 即可归档 mipsel ELF 对象（架
 rm -f meow_ui.a *.o
 
 # -I../meow_launcherd：meow_notify_ipc.c 复用共享协议头 meow_ipc.h（同一份、杜绝两端漂移）
-OBJS="meow_ui_gfx meow_ui_log meow_ui_notify meow_notify_ipc meow_ui_img meow_ui_widget meow_ui_input meow_ui_theme meow_ui_ime meow_ui_sys meow_ui_vol stb_image"
+OBJS="meow_ui_gfx meow_ui_log meow_ui_notify meow_notify_ipc meow_ui_img meow_ui_widget meow_ui_input meow_ui_theme meow_ui_ime meow_ui_sys meow_ui_vol meow_ui_activity meow_ui_global stb_image"
 CFLAGS="-Os -static -I$ROOT/patch_v2/meow_launcherd"
 for f in $OBJS; do
   echo "== cc $f =="