feat(sdk/view): 视图框架批次① — z序绘制物注册表(meow_ui_draw.c: 自动注册+auto_z(深度*步长+层内seq)+set_z(999)置顶+MEOW_Z_AUTO_MAX=127) + meow_view骨架(meow_ui_view.c/.h: 嵌套容器+六生命周期+page_push/pop/replace包装activity栈+sub_push/pop预留桩) + 收敛live_btn走invalidate + hello迁移(d_paint_region/d_redraw删除→meow_ui_invalidate, chrome set_z(999), demo文本注册CUSTOM z=128) (agent-176, 定案见SDK_VIEW_FRAMEWORK_DESIGN.md §E①)

meow_ui.a d814d0ed→7e20f10e; hello 0a1c96a5→2ce09466
宿主验证: test_p1p2p3_repro P1c/P2/P3 ALL PASS; test_meow_ui_widgets ALL PASS 无回归; mipsel -Wall -Wextra 0 warning

patch_v2/sdk/test_meow_ui_widgets.c

@@ -5,6 +5,7 @@
  *   gcc -o test_meow_ui_widgets test_meow_ui_widgets.c test_host_stub.c \
  *       meow_ui_gfx.c meow_ui_sys.c meow_ui_theme.c meow_ui_vol.c meow_ui_log.c \
  *       meow_ui_widget.c meow_ui_input.c meow_ui_activity.c meow_ui_dialog.c meow_ui_ime.c \
+ *       meow_ui_draw.c meow_ui_view.c \
  *       -I. -I../meow_launcherd -DMEOW_UI_HOST_TEST -pthread
  * 运行：MEOW_UI_DUMP=/tmp/b2.ppm ./test_meow_ui_widgets   （可选，dump 屏幕）
  */