diff --git a/patch_v2/hello_app/hello b/patch_v2/hello_app/hello
index c63acbc..d07d3df 100755
Binary files a/patch_v2/hello_app/hello and b/patch_v2/hello_app/hello differ
diff --git a/patch_v2/hello_app/hello.c b/patch_v2/hello_app/hello.c
index 4d4e87c..aa02370 100644
--- a/patch_v2/hello_app/hello.c
+++ b/patch_v2/hello_app/hello.c
@@ -140,6 +140,31 @@ static meow_widget *g_dlc;  static rect_t r_list;   /* LazyColumn */
 static meow_dialog *g_dlg;
 static meow_sheet  *g_sheet;
 
+/* ---- demo 分区标题/slider 值文本：注册为 CUSTOM 绘制物（§6.2 区域重画会重画它们）----
+ * 显式 z=D_TITLE_Z：> 一切自动 z(=127)、< chrome 置顶(999)，故「内容→标题→slider值→chrome」。
+ * 非控件直绘必须注册，否则 meow_ui_invalidate 清底后会漏画（非保留模型固有代价）。 */
+#define D_TITLE_Z 128
+static int g_dtitle_cid[D_TITLE_MAX];   /* 分区标题绘制物 id（rebuild 时注销/重注册） */
+static int g_slider_cid = 0;            /* slider 值文本绘制物 id */
+
+/* CUSTOM 绘制回调：分区标题（ctx=title 下标，指向 g_dtitle[i]） */
+static void demo_draw_title(void *ctx)
+{
+    int i = (int)(intptr_t)ctx;
+    if (i < 0 || i >= g_dtitle_n) return;
+    const meow_theme *th = meow_theme_get();
+    meow_ui_text(g_dtitle[i].x, g_dtitle[i].y, g_dtitle[i].s, 20, th->primary);
+}
+/* CUSTOM 绘制回调：slider 当前值文本（bbox=r_slider_txt） */
+static void demo_draw_slider_val(void *ctx)
+{
+    (void)ctx;
+    if (!g_dslider) return;
+    const meow_theme *th = meow_theme_get();
+    char buf[28]; snprintf(buf, sizeof buf, "slider = %d", meow_slider_get(g_dslider));
+    meow_ui_text(r_slider_txt.x, r_slider_txt.y, buf, 20, th->dim);
+}
+
 /* 前向声明 */
 static void redraw(void);
 static void demo_rebuild_to(int scroll);
@@ -218,8 +243,16 @@ static void d_slot(meow_widget *w, rect_t r)
 }
 static void d_title(int x, int y, const char *s)
 {
-    if (g_dtitle_n < D_TITLE_MAX) { g_dtitle[g_dtitle_n].x = x; g_dtitle[g_dtitle_n].y = y;
-                                    g_dtitle[g_dtitle_n].s = s; g_dtitle_n++; }
+    if (g_dtitle_n < D_TITLE_MAX) {
+        int i = g_dtitle_n;
+        g_dtitle[i].x = x; g_dtitle[i].y = y; g_dtitle[i].s = s;
+        g_dtitle_n++;
+        /* 注册为 CUSTOM 绘制物（bbox=文本绘制范围；cb 读 g_dtitle[i]） */
+        int tw = meow_ui_text_width(s, 20);
+        int th = meow_ui_text_height(20);
+        g_dtitle_cid[i] = meow_draw_custom_register(D_TITLE_Z, x, y, tw, th,
+                                                    demo_draw_title, (void *)(intptr_t)i);
+    }
 }
 
 /* LazyColumn 数据源（100 项虚拟化） */
@@ -231,12 +264,15 @@ static int demo_list_src(int idx, char *label, int len, void *ctx)
     return 1;
 }
 
-/* 释放当前全部内容控件（含 Card 的独立子按钮）；chrome 不在其列。 */
+/* 释放当前全部内容控件（含 Card 的独立子按钮）与 CUSTOM 绘制物；chrome 不在其列。 */
 static void demo_free_content(void)
 {
     for (int i = 0; i < g_dslot_n; i++) meow_widget_free(g_dslot[i].w);
     g_dslot_n = 0;
     if (g_dcard_btn) { meow_widget_free(g_dcard_btn); g_dcard_btn = NULL; }
+    for (int i = 0; i < g_dtitle_n; i++)
+        if (g_dtitle_cid[i] > 0) { meow_draw_unregister(g_dtitle_cid[i]); g_dtitle_cid[i] = 0; }
+    if (g_slider_cid > 0) { meow_draw_unregister(g_slider_cid); g_slider_cid = 0; }
     g_dtitle_n = 0;
 }
 
@@ -272,8 +308,11 @@ static void demo_build_at(int scroll)
     d_title(DCL_X, SY(yb), "INPUT & STATE"); yb += 26;
     r_dsw = RX(DCL_X, SY(yb), 56, 32); g_dsw = meow_switch_create(r_dsw.x, r_dsw.y, g_ds.sw_on); SLOT(g_dsw, r_dsw.x, r_dsw.y, r_dsw.w, r_dsw.h); yb += 44;
 
-    r_slider_txt = RX(DCL_X, SY(yb), 100, 24); yb += 24;
+    r_slider_txt = RX(DCL_X, SY(yb), 160, 24); yb += 24;   /* 加宽到覆盖值文本全宽（防局部刷漏尾） */
     r_slider = RX(DCL_X, SY(yb), DFW, 40); g_dslider = meow_slider_create(r_slider.x, r_slider.y, r_slider.w, 0, 100, g_ds.slider); SLOT(g_dslider, r_slider.x, r_slider.y, r_slider.w, r_slider.h); yb += 48;
+    g_slider_cid = meow_draw_custom_register(D_TITLE_Z, r_slider_txt.x, r_slider_txt.y,
+                                             r_slider_txt.w, r_slider_txt.h,
+                                             demo_draw_slider_val, NULL);
 
     r_dtf = RX(DCL_X, SY(yb), DFW, 44); g_dtf = meow_textfield_create(r_dtf.x, r_dtf.y, r_dtf.w, r_dtf.h, "Type here...", g_ds.tf, 32, MEOW_IME_ASCII); SLOT(g_dtf, r_dtf.x, r_dtf.y, r_dtf.w, r_dtf.h); yb += 54;
 
@@ -332,27 +371,14 @@ static void demo_build_at(int scroll)
 #undef SLOT
 }
 
-/* demo 全页重绘：背景 + 内容控件(已定位) + 标题 + slider 值 + chrome(后画覆盖) + 内容区 flush */
+/* demo 全页重绘：整帧按 z 序重画全部（set_page_bg 清底 + 注册表按 z 升序）。
+ * 此前手工遍历 g_dslot/g_dtitle/后画 chrome 已删；现在自动 z 排：内容(0..127)→标题/slider值(128)
+ * →chrome(999 置顶)，与旧绘制序一致，但「清底+重画」由 SDK 统一按 z 保证（P1 修法下沉）。 */
 static void demo_paint(void)
 {
     const meow_theme *th = meow_theme_get();
-    int sb = meow_ui_statusbar_height();
-
-    meow_ui_fill_rect(0, sb, 480, 720 - sb, th->bg);
-
-    for (int i = 0; i < g_dslot_n; i++) meow_widget_draw(g_dslot[i].w);
-    for (int i = 0; i < g_dtitle_n; i++)
-        meow_ui_text(g_dtitle[i].x, g_dtitle[i].y, g_dtitle[i].s, 20, th->primary);
-    if (g_dslider) {
-        char buf[28]; snprintf(buf, sizeof buf, "slider = %d", meow_slider_get(g_dslider));
-        meow_ui_text(r_slider_txt.x, r_slider_txt.y, buf, 20, th->dim);
-    }
-    /* chrome（固定；后画覆盖内容溢出区） */
-    meow_widget_draw(g_tb);
-    meow_widget_draw(g_nav);
-    meow_widget_draw(g_fab);
-
-    meow_ui_flush_region(0, sb, 480, 720 - sb);
+    meow_ui_set_page_bg(th->bg);   /* 页面底 = 主题 bg（区域/整帧重画清底用） */
+    meow_ui_paint_full();          /* 整帧按 z 序重画 */
 }
 
 /* 重建内容到指定 scroll（clamp 到 [0, max_scroll]）；进入/滚动共用 */
@@ -369,51 +395,14 @@ static void demo_rebuild_to(int scroll)
     demo_paint();
 }
 
-/* 两矩形是否相交（P1：局部重绘时判定哪些控件落在该区） */
-static int d_rect_overlap(rect_t a, rect_t b)
-{
-    return a.x < b.x + b.w && a.x + a.w > b.x && a.y < b.y + b.h && a.y + a.h > b.y;
-}
-
-/* 局部刷新一个区域：清底 + 按 demo_paint 同序重画「落在该区的所有控件/文本/chrome」，再 flush。
- * 根治 P1：旧 d_redraw 只清底 + 重画单个控件，会把重叠区里上层控件（chrome 如 FAB/导航栏）
- * 一并清掉、只刷单个控件矩形 → 下层动态控件（如圆形进度条实时重绘）盖住/抹掉上层浮层。
- * 修法：局部刷新=重画该区内完整 z 栈（内容→标题→slider 值→chrome，与整帧 paint 一致），
- * 下层动态重绘不再抹掉上层。仍是局部（只画相交控件，不整帧、不冲状态栏）。 */
-static void d_paint_region(rect_t r)
-{
-    if (r.w <= 0 || r.h <= 0) return;
-    const meow_theme *th = meow_theme_get();
-    meow_ui_fill_rect(r.x, r.y, r.w, r.h, th->bg);
-    for (int i = 0; i < g_dslot_n; i++)
-        if (d_rect_overlap(g_dslot[i].r, r)) meow_widget_draw(g_dslot[i].w);
-    for (int i = 0; i < g_dtitle_n; i++)
-        if (g_dtitle[i].y < r.y + r.h && g_dtitle[i].y + meow_ui_text_height(20) > r.y &&
-            g_dtitle[i].x < r.x + r.w && g_dtitle[i].x + meow_ui_text_width(g_dtitle[i].s, 20) > r.x)
-            meow_ui_text(g_dtitle[i].x, g_dtitle[i].y, g_dtitle[i].s, 20, th->primary);
-    if (g_dslider && d_rect_overlap(r_slider_txt, r)) {
-        char buf[28]; snprintf(buf, sizeof buf, "slider = %d", meow_slider_get(g_dslider));
-        meow_ui_text(r_slider_txt.x, r_slider_txt.y, buf, 20, th->dim);
-    }
-    /* chrome（固定；后画保证覆盖内容区溢出） */
-    if (d_rect_overlap(r_tb, r))  meow_widget_draw(g_tb);
-    if (d_rect_overlap(r_nav, r)) meow_widget_draw(g_nav);
-    if (d_rect_overlap(r_fab, r)) meow_widget_draw(g_fab);
-    meow_ui_flush_region(r.x, r.y, r.w, r.h);
-}
-
-/* 局部刷新一个控件：整区清底 + 重画重叠 z 栈（w 仅用于取矩形；重画逻辑见 d_paint_region） */
-static void d_redraw(meow_widget *w, rect_t r)
-{
-    (void)w;
-    d_paint_region(r);
-}
-
+/* 局部刷新统一走 SDK meow_ui_invalidate（清底 + 按 z 重画相交绘制物 + 上屏）；
+ * 旧 d_paint_region/d_redraw/d_rect_overlap（App 层 z 栈重画）已删除、下沉到 SDK（§6.2）。
+ * 局部刷新一控件：整区清底 + 重画重叠 z 栈由注册表完成。 */
 static void d_toggle_sel(meow_widget *w, rect_t r)
 {
     if (!w) return;
     meow_widget_set_selected(w, !meow_widget_selected(w));
-    d_redraw(w, r);
+    meow_ui_invalidate(r.x, r.y, r.w, r.h);
 }
 
 /* Tap：落点在内容控件上，返回 1=已消费 */
@@ -423,29 +412,29 @@ static int demo_content_tap(int x, int y)
 
     for (int i = 0; i < 5; i++)
         if (meow_widget_hit(g_dbtn_b[i], x, y)) { d_toggle_sel(g_dbtn_b[i], r_btn[i]); g_ds.btn[i] = meow_widget_selected(g_dbtn_b[i]); return 1; }
-    if (meow_widget_hit(g_dr1, x, y)) { meow_widget_set_selected(g_dr1, 1); meow_widget_set_selected(g_dr2, 0); g_ds.r1 = 1; g_ds.r2 = 0; d_redraw(g_dr1, r_dr1); d_redraw(g_dr2, r_dr2); return 1; }
-    if (meow_widget_hit(g_dr2, x, y)) { meow_widget_set_selected(g_dr2, 1); meow_widget_set_selected(g_dr1, 0); g_ds.r2 = 1; g_ds.r1 = 0; d_redraw(g_dr1, r_dr1); d_redraw(g_dr2, r_dr2); return 1; }
+    if (meow_widget_hit(g_dr1, x, y)) { meow_widget_set_selected(g_dr1, 1); meow_widget_set_selected(g_dr2, 0); g_ds.r1 = 1; g_ds.r2 = 0; meow_ui_invalidate(r_dr1.x, r_dr1.y, r_dr1.w, r_dr1.h); meow_ui_invalidate(r_dr2.x, r_dr2.y, r_dr2.w, r_dr2.h); return 1; }
+    if (meow_widget_hit(g_dr2, x, y)) { meow_widget_set_selected(g_dr2, 1); meow_widget_set_selected(g_dr1, 0); g_ds.r2 = 1; g_ds.r1 = 0; meow_ui_invalidate(r_dr1.x, r_dr1.y, r_dr1.w, r_dr1.h); meow_ui_invalidate(r_dr2.x, r_dr2.y, r_dr2.w, r_dr2.h); return 1; }
     if (meow_widget_hit(g_dcb, x, y)) { d_toggle_sel(g_dcb, r_dcb); g_ds.ck = meow_widget_selected(g_dcb); return 1; }
-    if (meow_widget_hit(g_dsw, x, y)) { g_ds.sw_on = !meow_switch_get(g_dsw); meow_switch_set(g_dsw, g_ds.sw_on); d_redraw(g_dsw, r_dsw); return 1; }
+    if (meow_widget_hit(g_dsw, x, y)) { g_ds.sw_on = !meow_switch_get(g_dsw); meow_switch_set(g_dsw, g_ds.sw_on); meow_ui_invalidate(r_dsw.x, r_dsw.y, r_dsw.w, r_dsw.h); return 1; }
     if (meow_widget_hit(g_dslider, x, y)) { demo_slider_drag(x); return 1; }
     if (meow_widget_hit(g_dtf, x, y)) {
         meow_textfield_activate(g_dtf);   /* 阻塞 IME，返回后刷新 + 状态回写 */
         strncpy(g_ds.tf, meow_textfield_text(g_dtf), sizeof g_ds.tf - 1);
         g_ds.tf[sizeof g_ds.tf - 1] = 0;
-        d_redraw(g_dtf, r_dtf);
+        meow_ui_invalidate(r_dtf.x, r_dtf.y, r_dtf.w, r_dtf.h);
         return 1;
     }
     if (meow_widget_hit(g_dcard_btn, x, y)) { d_toggle_sel(g_dcard_btn, r_cardbtn); g_ds.card = meow_widget_selected(g_dcard_btn); return 1; }
     if (g_dtab) {
         int t = meow_tabbar_hit(g_dtab, x, y);
-        if (t >= 0) { g_ds.tab = t; meow_tabbar_set_selected(g_dtab, t); d_redraw(g_dtab, r_tab); return 1; }
+        if (t >= 0) { g_ds.tab = t; meow_tabbar_set_selected(g_dtab, t); meow_ui_invalidate(r_tab.x, r_tab.y, r_tab.w, r_tab.h); return 1; }
     }
-    if (meow_widget_hit(g_dbtn_dlg, x, y)) { meow_dialog_show(g_dlg); meow_log(MEOW_LOG_INFO, "dialog result=%d", meow_dialog_result(g_dlg)); d_redraw(g_dbtn_dlg, r_dlg); return 1; }
-    if (meow_widget_hit(g_dbtn_sheet, x, y)) { int r = meow_sheet_open(g_sheet); meow_log(MEOW_LOG_INFO, "sheet result=%d", r); d_redraw(g_dbtn_sheet, r_sheet); return 1; }
+    if (meow_widget_hit(g_dbtn_dlg, x, y)) { meow_dialog_show(g_dlg); meow_log(MEOW_LOG_INFO, "dialog result=%d", meow_dialog_result(g_dlg)); meow_ui_invalidate(r_dlg.x, r_dlg.y, r_dlg.w, r_dlg.h); return 1; }
+    if (meow_widget_hit(g_dbtn_sheet, x, y)) { int r = meow_sheet_open(g_sheet); meow_log(MEOW_LOG_INFO, "sheet result=%d", r); meow_ui_invalidate(r_sheet.x, r_sheet.y, r_sheet.w, r_sheet.h); return 1; }
     if (meow_widget_hit(g_dlc, x, y)) {
         g_demo_focus = 1;
         int li = meow_list_tap_at(g_dlc, x, y);   /* M2.71-bug8：命中行→置选中并高亮 */
-        if (li >= 0) { g_ds.list_sel = li; d_redraw(g_dlc, r_list); }
+        if (li >= 0) { g_ds.list_sel = li; meow_ui_invalidate(r_list.x, r_list.y, r_list.w, r_list.h); }
         return 1;
     }
     return 0;
@@ -463,12 +452,13 @@ static void demo_on_tap(int x, int y)
         char lb[16]; snprintf(lb, sizeof lb, "+%d", g_demo_fab);
         meow_widget_free(g_fab);
         g_fab = meow_fab_create(r_fab.x, r_fab.y, 56, lb);
-        d_paint_region(r_fab);   /* 重画 FAB 及其下重叠内容（z 序一致，防抹掉下层） */
+        meow_widget_set_z(g_fab, 999);   /* 重建后重挂顶：新 entry 自动 z 低，须显式置顶 */
+        meow_ui_invalidate(r_fab.x, r_fab.y, r_fab.w, r_fab.h);   /* 重画 FAB 及其下重叠 z 栈 */
         return;
     }
     if (g_nav) {
         int idx = meow_navigationbar_hit(g_nav, x, y);
-        if (idx >= 0) { meow_navigationbar_set_selected(g_nav, idx); d_redraw(g_nav, r_nav); return; }
+        if (idx >= 0) { meow_navigationbar_set_selected(g_nav, idx); meow_ui_invalidate(r_nav.x, r_nav.y, r_nav.w, r_nav.h); return; }
     }
     if (demo_content_tap(x, y)) return;
 }
@@ -481,8 +471,8 @@ static void demo_tick(uint64_t now)
     g_demo_prog_last = now;
     g_ds.prog = (g_ds.prog + 3) % 101;
     g_demo_prog = g_ds.prog;
-    meow_progress_set(g_dprl, g_demo_prog); d_redraw(g_dprl, r_prl);
-    meow_progress_set(g_dprc, g_demo_prog); d_redraw(g_dprc, r_prc);
+    meow_progress_set(g_dprl, g_demo_prog); meow_ui_invalidate(r_prl.x, r_prl.y, r_prl.w, r_prl.h);
+    meow_progress_set(g_dprc, g_demo_prog); meow_ui_invalidate(r_prc.x, r_prc.y, r_prc.w, r_prc.h);
 }
 
 /* 按触碰 X 落 slider 值并局部刷（按下即定位 + 拖动实时，M2.71-bug2） */
@@ -491,8 +481,8 @@ static void demo_slider_drag(int x)
     int frac = x - r_slider.x; if (frac < 0) frac = 0; if (frac > r_slider.w) frac = r_slider.w;
     g_ds.slider = frac * 100 / r_slider.w;
     meow_slider_set(g_dslider, g_ds.slider);
-    d_redraw(g_dslider, r_slider);
-    d_paint_region(r_slider_txt);   /* 重画 slider 值文本（z 序一致） */
+    meow_ui_invalidate(r_slider.x, r_slider.y, r_slider.w, r_slider.h);
+    meow_ui_invalidate(r_slider_txt.x, r_slider_txt.y, r_slider_txt.w, r_slider_txt.h);  /* 重画值文本 */
 }
 
 /* demo 页 on_touch_down：锁一种拖拽（slider > list > 页内容）。非 demo 态跳过。
@@ -522,7 +512,7 @@ static void demo_touch_move(int x, int y)
     if (g_drag_slider) { demo_slider_drag(x); return; }
     if (g_drag_list) {
         int dy = y - g_drag_list_last_y; g_drag_list_last_y = y;
-        if (dy) { meow_list_scroll_by(g_dlc, -dy); g_ds.list = meow_list_scroll(g_dlc); d_redraw(g_dlc, r_list); }
+        if (dy) { meow_list_scroll_by(g_dlc, -dy); g_ds.list = meow_list_scroll(g_dlc); meow_ui_invalidate(r_list.x, r_list.y, r_list.w, r_list.h); }
         return;
     }
     if (g_drag_page) {
@@ -546,7 +536,7 @@ static void demo_swipe(int dir, int dist)
     if (g_demo_focus && g_dlc) {
         meow_list_scroll_by(g_dlc, del);
         g_ds.list = meow_list_scroll(g_dlc);
-        d_redraw(g_dlc, r_list);   /* 列表区局部刷新 */
+        meow_ui_invalidate(r_list.x, r_list.y, r_list.w, r_list.h);   /* 列表区局部刷新 */
     } else {
         demo_rebuild_to(g_demo_scroll + del);
     }
@@ -575,6 +565,10 @@ static void demo_init(void)
     meow_navigationbar_add_item(g_nav, "More");
     meow_navigationbar_set_selected(g_nav, 0);
     r_fab = RX(406, 616, 56, 56); g_fab = meow_fab_create(406, 616, 56, "+");
+    /* chrome 显式置顶（§6.2 置顶）：> 一切自动 z(127)，区域重画/整帧都最后画 chrome。 */
+    meow_widget_set_z(g_tb, 999);
+    meow_widget_set_z(g_nav, 999);
+    meow_widget_set_z(g_fab, 999);
     demo_build_at(0);
     meow_ui_activity_pop();
     g_demo_scroll = 0;
diff --git a/patch_v2/sdk/build_sdk.sh b/patch_v2/sdk/build_sdk.sh
index 9994d4d..b7440e4 100755
--- a/patch_v2/sdk/build_sdk.sh
+++ b/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 meow_ui_activity meow_ui_global meow_ui_dialog meow_ui_config 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 meow_ui_dialog meow_ui_config meow_ui_draw meow_ui_view stb_image"
 CFLAGS="-Os -static -I$ROOT/patch_v2/meow_launcherd"
 for f in $OBJS; do
   echo "== cc $f =="
diff --git a/patch_v2/sdk/meow_ui.h b/patch_v2/sdk/meow_ui.h
index 4c3da44..c1df222 100644
--- a/patch_v2/sdk/meow_ui.h
+++ b/patch_v2/sdk/meow_ui.h
@@ -210,6 +210,58 @@ void meow_ui_global_remove(int id);
 /* ③ 系统级控件：状态栏/通知中心/左缘返回滑条/电源菜单等全局叠加层——仅 SDK 内部接口，
  * 不向用户 App 开放任何公共悬浮/叠加层 API。既有状态栏/返回滑条逻辑（§3.1）不动。 */
 
+/* ============================================================ */
+/* §6.2 绘制物注册表 / z 序 / 区域重画（合并 SDK_Z_ORDER_DESIGN，源:2026-08-31）
+ * ------------------------------------------------------------
+ * 非保留模型（§5.8.7）下，把「清底 + 按 z 重画重叠区完整 z 栈」下沉到 SDK，让所有 App
+ * 自动获得正确的局部重画（根治 P1：下层动态控件局部重绘会把重叠区上层 chrome 抹掉）。
+ *   - 控件（meow_widget）创建即自动注册进绘制物注册表；rect 实时读 w->x/y/w/h；
+ *   - App 直绘的非控件内容（meow_ui_text/fill_rect 等）须显式 meow_draw_custom_register
+ *     注册（声明 bbox + 绘制回调），否则区域重画会漏画（非保留模型固有代价）；
+ *   - z 自动推导（子>父、同层注册先序）；显式 meow_widget_set_z(999/MEOW_Z_TOP) 置顶（粘滞）。
+ * 用法：meow_ui_invalidate(x,y,w,h) 局部重画（清底+按 z 升序重画所有相交绘制物+上屏），
+ * 不整帧；meow_ui_paint_full() 整帧按 z 序重画。默认底=meow_theme bg（set_page_bg 覆盖）。
+ * 兼容：新 API 全部 opt-in；不调用本节的既有 App（widget/activity/flush 均不动）行为完全不变。 */
+/* ============================================================ */
+
+/* 绘制物种类：控件（自动注册）/ App 直绘内容（显式注册）。 */
+typedef enum { MEOW_ITEM_WIDGET = 0, MEOW_ITEM_CUSTOM = 1 } meow_draw_kind;
+typedef void (*meow_draw_fn)(void *ctx);   /* CUSTOM 绘制回调（ctx 由 App 持有） */
+
+/* ---- 层级常量（保证"子>父" + 值域远小于置顶值）---- */
+#define MEOW_Z_STRIDE        16   /* 每层容器嵌套的 z 步进（子层至少 +16） */
+#define MEOW_Z_DEPTH_MAX     7    /* 自动推导最大嵌套深度（0..6，>7 折叠） */
+#define MEOW_Z_PER_LEVEL_MAX 15   /* 每层最多 16 槽（seq 0..15，超出折叠按注册序） */
+#define MEOW_Z_AUTO_MAX      (MEOW_Z_STRIDE * MEOW_Z_DEPTH_MAX + MEOW_Z_PER_LEVEL_MAX) /* 127 */
+#define MEOW_Z_TOP           1000 /* 惯例"置顶"值；≥(MEOW_Z_AUTO_MAX+1)=128 即超一切自动值 */
+
+/* 控件显式置层：z 为任意非负整数（0..INT_MAX，无上限），越大越上；z>所有其它控件即恒在最上。
+ * 惯例设 999（或 MEOW_Z_TOP）即"置顶"。显式 z 存于绘制注册表（按 w 反查 entry，不改
+ * struct meow_widget——零 ABI 破坏）且**粘滞**：不被后续自动推导覆盖；clear_z 才回退。 */
+void meow_widget_set_z(meow_widget *w, int z);
+int  meow_widget_z(const meow_widget *w);    /* 当前生效 z（显式=其值，否则=自动推导） */
+void meow_widget_clear_z(meow_widget *w);    /* 清除显式 z，回退自动推导 */
+
+/* ---- 非控件直绘内容注册为绘制物（CUSTOM）----
+ * App 声明 bbox + 绘制回调 + 显式 z（任意非负；999=置顶）；区域重画/整帧重画会画到它。
+ * 返回 id（供 meow_draw_unregister / meow_draw_set_z）；注册表满返回 0。
+ * 生命周期契约：App 持有 ctx；widget 类内容不必注册（自动）；离开页面前 unregister。 */
+int  meow_draw_custom_register(int z, int x, int y, int w, int h,
+                               meow_draw_fn cb, void *ctx);
+void meow_draw_unregister(int id);           /* 注销（id 失效，勿再用） */
+int  meow_draw_set_z(int id, int z);         /* 改 custom 显式 z；无效 id 返回 -1 */
+
+/* 页面背景色（区域重画/整帧清底用）；默认 meow_theme bg。 */
+void     meow_ui_set_page_bg(uint32_t color);
+uint32_t meow_ui_page_bg(void);
+
+/* 声明某区域内容已变化 → 清底(page_bg) + 按 z 升序重画所有相交绘制物 + 上屏。
+ * 局部（只画相交绘制物，完整 bbox——见 SDK_Z_ORDER_DESIGN §5），不整帧、不冲状态栏。 */
+void meow_ui_invalidate(int x, int y, int w, int h);
+
+/* 整帧按 z 序重画全部（set_page_bg 清底 + 全注册表按 z 升序 + 上屏）。 */
+void meow_ui_paint_full(void);
+
 /* ============================================================ */
 /* §3.1 全局状态栏 / 全屏（A-0，SDK 系统级组件） */
 /* ============================================================ */
diff --git a/patch_v2/sdk/meow_ui_draw.c b/patch_v2/sdk/meow_ui_draw.c
new file mode 100644
index 0000000..fc25145
--- /dev/null
+++ b/patch_v2/sdk/meow_ui_draw.c
@@ -0,0 +1,357 @@
+/*
+ * meow_ui_draw.c — 绘制物注册表 / z 序 / 区域重画（§6.2 / SDK_Z_ORDER_DESIGN §2）。
+ *
+ * 非保留模型下，把「清底 + 按 z 重画重叠区完整 z 栈」下沉到 SDK：
+ *   - 控件（meow_widget）创建即自动注册（create 末尾调 meow_draw_widget_register），
+ *     meow_widget_free 自动注销；rect 实时读 w->x/y/w/h；
+ *   - App 直绘的非控件内容显式 meow_draw_custom_register（声明 bbox + 绘制回调）；
+ *   - z 自动推导（子>父、同层注册先序）；显式 set_z 粘滞、置顶。
+ * 显式 z 存于本注册表（按 w 反查 entry），**不改 struct meow_widget**（零 ABI 破坏）。
+ */
+#include "meow_ui.h"
+#include "meow_ui_internal.h"
+#include "meow_ui_view.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define MEOW_DRAW_MAX 256
+#define MEOW_ITEM_VIEW 2   /* 内部 kinds（不进公共枚举）：meow_view 绘制物 */
+
+typedef struct draw_entry {
+    int kind;                 /* MEOW_ITEM_WIDGET / MEOW_ITEM_CUSTOM / MEOW_ITEM_VIEW */
+    meow_widget *w;           /* WIDGET：绘制其 meow_widget_draw(w) */
+    meow_draw_fn draw_cb;     /* CUSTOM：绘制回调 */
+    void *ctx;                /* CUSTOM: 传给 draw_cb; VIEW: (meow_view*)v */
+    int rx, ry, rw, rh;       /* CUSTOM bbox（WIDGET 读 w->x/y/w/h，VIEW 读 v->x/y/w/h） */
+    int z;                    /* 生效 z（显式=其值，否则=自动推导） */
+    int z_explicit;           /* 1=显式（粘滞） */
+    int id;                   /* CUSTOM id（0=无效） */
+    int seq;                  /* 全局注册序（z 同值时稳定先序） */
+    struct meow_view *view;   /* WIDGET：所属 view（z 深度源）+1 */
+} draw_entry;
+
+static draw_entry g_e[MEOW_DRAW_MAX];
+static int g_n = 0;
+static int g_seq = 0;       /* 全局注册序（单调递增） */
+static int g_next_id = 1;   /* CUSTOM id 起点（0=无效） */
+
+static uint32_t g_page_bg = 0;
+static int g_page_bg_set = 0;
+
+/* ---- 内部访问器（widget.c 提供；跨 TU 用 meow_ui_internal.h 声明）---- */
+static int w_is_layout(const meow_widget *w) { return meow_widget_is_layout(w); }
+
+/* ---- 查找 ---- */
+static draw_entry *e_find_widget(const meow_widget *w)
+{
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_WIDGET && g_e[i].w == w) return &g_e[i];
+    return NULL;
+}
+static draw_entry *e_find_view(const meow_view *v)
+{
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_VIEW && g_e[i].ctx == (void *)v) return &g_e[i];
+    return NULL;
+}
+static draw_entry *e_find_id(int id)
+{
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_CUSTOM && g_e[i].id == id) return &g_e[i];
+    return NULL;
+}
+
+/* ---- 深度：view 树深度 ---- */
+static int view_depth(const meow_view *v)
+{
+    int d = 0;
+    const meow_view *p = v ? v->parent : NULL;
+    while (p) {
+        d++;
+        if (d > MEOW_Z_DEPTH_MAX) break;
+        p = p->parent;
+    }
+    return d;
+}
+
+/* ---- 深度：widget 所属嵌套深度（view 树为主；否则 W_LAYOUT children 反推；否则 0）---- */
+static int widget_nest_depth(meow_widget *w, int depth)
+{
+    if (depth > MEOW_Z_DEPTH_MAX) return MEOW_Z_DEPTH_MAX;
+    draw_entry *e = e_find_widget(w);
+    if (e && e->view) return view_depth(e->view) + 1;   /* 视图树深度源（更确定） */
+    /* 注册表反推：w 是否经 meow_layout_add 挂在某布局下（此时布局自身已注册为 WIDGET）。 */
+    for (int i = 0; i < g_n; i++) {
+        if (g_e[i].kind != MEOW_ITEM_WIDGET) continue;
+        meow_widget *lw = g_e[i].w;
+        if (!lw || !w_is_layout(lw)) continue;
+        int nc = meow_widget_nchild(lw);
+        for (int j = 0; j < nc; j++)
+            if (meow_widget_child_at(lw, j) == w)
+                return widget_nest_depth(lw, depth + 1) + 1;  /* 子层 >= 父层+1 */
+    }
+    return 0;
+}
+
+/* 计算 auto z（显式不重算——粘滞）：depth*STRIDE + 层内 seq（注册先序，折叠 MEOW_Z_PER_LEVEL_MAX）。 */
+static void e_compute_auto(draw_entry *e)
+{
+    if (e->z_explicit) return;
+    int depth = 0;
+    if (e->kind == MEOW_ITEM_WIDGET && e->w)        depth = widget_nest_depth(e->w, 0);
+    else if (e->kind == MEOW_ITEM_VIEW && e->ctx)   depth = view_depth((const meow_view *)e->ctx);
+    /* CUSTOM：z 恒显式（register 传入），不进 auto 分支 */
+    int cnt = 0;
+    for (int i = 0; i < g_n; i++) {
+        draw_entry *o = &g_e[i];
+        if (o == e || o->z_explicit) continue;
+        if (o->seq >= e->seq) continue;
+        if (o->z / MEOW_Z_STRIDE == depth) cnt++;
+    }
+    if (cnt > MEOW_Z_PER_LEVEL_MAX) cnt = MEOW_Z_PER_LEVEL_MAX;
+    e->z = depth * MEOW_Z_STRIDE + cnt;
+}
+
+/* ============================================================ */
+/* 控件自动注册 / 注销（create 末尾 / meow_widget_free 调用）   */
+/* ============================================================ */
+void meow_draw_widget_register(meow_widget *w)
+{
+    if (!w || e_find_widget(w)) return;          /* 幂等 */
+    if (g_n >= MEOW_DRAW_MAX) return;            /* 满：静默（骨架级） */
+    draw_entry *e = &g_e[g_n++];
+    memset(e, 0, sizeof *e);
+    e->kind = MEOW_ITEM_WIDGET;
+    e->w = w;
+    e->seq = g_seq++;
+    e_compute_auto(e);
+}
+
+void meow_draw_widget_unregister(meow_widget *w)
+{
+    if (!w) return;
+    int idx = -1;
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_WIDGET && g_e[i].w == w) { idx = i; break; }
+    if (idx < 0) return;
+    g_e[idx] = g_e[--g_n];                        /* 交换移除（seq 保留，排序稳定） */
+}
+
+int meow_draw_widget_registered(const meow_widget *w)
+{
+    return w ? e_find_widget(w) != NULL : 0;
+}
+
+void meow_draw_widget_set_view(meow_widget *w, struct meow_view *v)
+{
+    draw_entry *e = e_find_widget(w);
+    if (!e) return;
+    e->view = v;
+    e_compute_auto(e);
+}
+
+/* ============================================================ */
+/* 显式 z（widget）                                              */
+/* ============================================================ */
+void meow_widget_set_z(meow_widget *w, int z)
+{
+    if (!w || z < 0) return;
+    draw_entry *e = e_find_widget(w);
+    if (!e) return;
+    e->z_explicit = 1;
+    e->z = z;
+}
+int meow_widget_z(const meow_widget *w)
+{
+    if (!w) return 0;
+    draw_entry *e = e_find_widget((meow_widget *)w);
+    if (!e) return 0;
+    if (e->z_explicit) return e->z;
+    e_compute_auto(e);
+    return e->z;
+}
+void meow_widget_clear_z(meow_widget *w)
+{
+    if (!w) return;
+    draw_entry *e = e_find_widget(w);
+    if (!e) return;
+    e->z_explicit = 0;
+    e_compute_auto(e);
+}
+
+/* ============================================================ */
+/* CUSTOM（App 直绘）注册 / 注销 / 改 z                           */
+/* ============================================================ */
+int meow_draw_custom_register(int z, int x, int y, int w, int h,
+                              meow_draw_fn cb, void *ctx)
+{
+    if (!cb || w <= 0 || h <= 0) return 0;
+    if (g_n >= MEOW_DRAW_MAX) return 0;
+    draw_entry *e = &g_e[g_n++];
+    memset(e, 0, sizeof *e);
+    e->kind = MEOW_ITEM_CUSTOM;
+    e->draw_cb = cb;
+    e->ctx = ctx;
+    e->rx = x; e->ry = y; e->rw = w; e->rh = h;
+    e->z = z < 0 ? 0 : z;
+    e->z_explicit = 1;
+    e->id = g_next_id++;
+    e->seq = g_seq++;
+    return e->id;
+}
+void meow_draw_unregister(int id)
+{
+    if (id <= 0) return;
+    int idx = -1;
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_CUSTOM && g_e[i].id == id) { idx = i; break; }
+    if (idx < 0) return;
+    g_e[idx] = g_e[--g_n];
+}
+int meow_draw_set_z(int id, int z)
+{
+    if (id <= 0 || z < 0) return -1;
+    draw_entry *e = e_find_id(id);
+    if (!e) return -1;
+    e->z = z;
+    e->z_explicit = 1;
+    return 0;
+}
+
+/* ============================================================ */
+/* view 绘制物注册 / 注销                                          */
+/* ============================================================ */
+void meow_draw_view_register(struct meow_view *v)
+{
+    if (!v || e_find_view(v)) return;
+    if (g_n >= MEOW_DRAW_MAX) return;
+    draw_entry *e = &g_e[g_n++];
+    memset(e, 0, sizeof *e);
+    e->kind = MEOW_ITEM_VIEW;
+    e->ctx = (void *)v;
+    e->seq = g_seq++;
+    e_compute_auto(e);
+}
+void meow_draw_view_unregister(struct meow_view *v)
+{
+    if (!v) return;
+    int idx = -1;
+    for (int i = 0; i < g_n; i++)
+        if (g_e[i].kind == MEOW_ITEM_VIEW && g_e[i].ctx == (void *)v) { idx = i; break; }
+    if (idx < 0) return;
+    g_e[idx] = g_e[--g_n];
+}
+int meow_draw_view_entered(const struct meow_view *v)
+{
+    return v ? meow_view_get_state(v) & MEOW_VIEW_STATE_ENTERED : 0;
+}
+void meow_draw_view_set_z(struct meow_view *v, int z)
+{
+    draw_entry *e = e_find_view(v);
+    if (!e) return;
+    if (z <= 0) {
+        e->z_explicit = 0;
+        e_compute_auto(e);
+    } else {
+        e->z_explicit = 1;
+        e->z = z;
+    }
+}
+
+/* ============================================================ */
+/* page bg / 区域重画 / 整帧                                      */
+/* ============================================================ */
+void meow_ui_set_page_bg(uint32_t color) { g_page_bg = color; g_page_bg_set = 1; }
+uint32_t meow_ui_page_bg(void) { return g_page_bg_set ? g_page_bg : meow_theme_get()->bg; }
+
+static int rect_hit(int ax, int ay, int aw, int ah, int bx, int by, int bw, int bh)
+{
+    return ax < bx + bw && ax + aw > bx && ay < by + bh && ay + ah > by;
+}
+
+static int entry_rect(draw_entry *e, int out[4])
+{
+    if (e->kind == MEOW_ITEM_WIDGET && e->w) {
+        meow_widget_rect(e->w, out);
+    } else if (e->kind == MEOW_ITEM_VIEW && e->ctx) {
+        meow_view *v = (meow_view *)e->ctx;
+        out[0] = v->x; out[1] = v->y; out[2] = v->w; out[3] = v->h;
+    } else {
+        out[0] = e->rx; out[1] = e->ry; out[2] = e->rw; out[3] = e->rh;
+    }
+    return out[2] > 0 && out[3] > 0;
+}
+
+static void draw_one(draw_entry *e)
+{
+    switch (e->kind) {
+    case MEOW_ITEM_WIDGET:
+        meow_widget_draw(e->w);
+        break;
+    case MEOW_ITEM_CUSTOM:
+        e->draw_cb(e->ctx);
+        break;
+    case MEOW_ITEM_VIEW: {
+        meow_view *v = (meow_view *)e->ctx;
+        if (v->hooks.on_draw) v->hooks.on_draw(v, meow_theme_get(), v->ctx);
+        break;
+    }
+    default:
+        break;
+    }
+}
+
+static void paint(int full, int x, int y, int w, int h)
+{
+    uint32_t bg = meow_ui_page_bg();
+    if (full) {
+        meow_ui_clear(bg);
+    } else {
+        if (w <= 0 || h <= 0) return;
+        meow_ui_fill_rect(x, y, w, h, bg);
+    }
+    /* 刷新 auto z + 组装按 (z,seq) 升序的绘制序（owner==active 过滤 WIDGET；view 须已进入）。 */
+    draw_entry *order[MEOW_DRAW_MAX];
+    int nn = 0;
+    int active = meow_ui_activity_active();
+    for (int i = 0; i < g_n; i++) {
+        draw_entry *e = &g_e[i];
+        e_compute_auto(e);
+        if (e->kind == MEOW_ITEM_WIDGET && e->w && meow_widget_owner(e->w) != active) continue;
+        if (e->kind == MEOW_ITEM_VIEW && !meow_draw_view_entered((meow_view *)e->ctx)) continue;
+        order[nn++] = e;
+    }
+    /* 稳定插入排序：（z 升序，同 z 按 seq 升序＝注册先序）。 */
+    for (int i = 1; i < nn; i++) {
+        draw_entry *key = order[i];
+        int j = i - 1;
+        while (j >= 0 && (order[j]->z > key->z ||
+                          (order[j]->z == key->z && order[j]->seq > key->seq))) {
+            order[j + 1] = order[j];
+            j--;
+        }
+        order[j + 1] = key;
+    }
+    if (full) {
+        for (int i = 0; i < nn; i++) draw_one(order[i]);
+        meow_ui_flush();
+    } else {
+        int r[4];
+        for (int i = 0; i < nn; i++) {
+            if (!entry_rect(order[i], r)) continue;
+            if (rect_hit(r[0], r[1], r[2], r[3], x, y, w, h)) draw_one(order[i]);
+        }
+        meow_ui_flush_region(x, y, w, h);
+    }
+}
+
+void meow_ui_invalidate(int x, int y, int w, int h)
+{
+    if (w <= 0 || h <= 0) return;
+    paint(0, x, y, w, h);
+}
+
+void meow_ui_paint_full(void)
+{
+    paint(1, 0, 0, 0, 0);
+}
diff --git a/patch_v2/sdk/meow_ui_internal.h b/patch_v2/sdk/meow_ui_internal.h
index 62dbf3c..bc3c89b 100644
--- a/patch_v2/sdk/meow_ui_internal.h
+++ b/patch_v2/sdk/meow_ui_internal.h
@@ -184,6 +184,31 @@ void meow_widget_touch_refresh(void);
 void meow_ui_global_render(void);
 int  meow_ui_global_hit(int x, int y);
 
+/* ---- 绘制物注册表（meow_ui_draw.c，§6.2 绘制物注册表/z序/区域重画）----
+ * 内部协作接口：widget.c 在 create 末尾自动注册、meow_widget_free 自动注销；view.c 在
+ * meow_view_add_widget/meow_view_free 挂/摘 widget 与 view 的 z 深度源；live_btn 收敛查询
+ * 是否已注册（已注册→走 invalidate 区域重画，否则回退单控件 flush）。 */
+struct meow_view;   /* 仅前向声明；完整类型在 meow_ui_view.h */
+
+void meow_draw_widget_register(struct meow_widget *w);       /* create 末尾：自动注册（幂等） */
+void meow_draw_widget_unregister(struct meow_widget *w);     /* meow_widget_free：自动注销 */
+int  meow_draw_widget_registered(const struct meow_widget *w);/* 是否在注册表（live_btn 收敛用） */
+void meow_draw_widget_set_view(struct meow_widget *w, struct meow_view *v); /* 挂 view：重算 auto z */
+void meow_draw_view_register(struct meow_view *v);           /* view create：注册绘制物（on_draw 用） */
+void meow_draw_view_unregister(struct meow_view *v);         /* view free：注销 */
+int  meow_draw_view_entered(const struct meow_view *v);      /* view 是否已进入（绘制过滤参考） */
+void meow_draw_view_set_z(struct meow_view *v, int z);       /* view 显式 z（z<=0=清除回退自动） */
+
+/* 控件布局深度反推（meow_ui_draw.c 用；widget.c 实现，读 struct meow_widget 内部字段）。
+ * 让绘制注册表在「无 meow_view 时」仍能从 W_LAYOUT children 反推子>父深度。 */
+int  meow_widget_is_layout(const struct meow_widget *w);     /* 1 = W_LAYOUT */
+int  meow_widget_nchild(const struct meow_widget *w);        /* 布局子项数 */
+const struct meow_widget *meow_widget_child_at(const struct meow_widget *w, int idx);
+
+/* 控件几何/归属访问器（meow_ui_draw.c 用：绘制物 rect 实时读 + owner 过滤）。 */
+int  meow_widget_owner(const struct meow_widget *w);         /* 创建时绑定的 Activity */
+void meow_widget_rect(const struct meow_widget *w, int out[4]);   /* x,y,w,h */
+
 /* ---- IME（meow_ui_ime.c）---- */
 /* 当前是否显示软键盘。 */
 int  meow_ime_active(void);
diff --git a/patch_v2/sdk/meow_ui_view.c b/patch_v2/sdk/meow_ui_view.c
new file mode 100644
index 0000000..9ab349d
--- /dev/null
+++ b/patch_v2/sdk/meow_ui_view.c
@@ -0,0 +1,197 @@
+/*
+ * meow_ui_view.c — meow_view 视图/页面框架骨架（§A 视图数据结构/嵌套/生命周期/页面导航）。
+ *
+ * meow_view 是**薄壳**：容器 + 生命周期 + 事件路由；叶子仍是 meow_widget（不改）。绘制走
+ * z 序绘制物注册表（on_draw 回调，非保留——不缓存像素）。opt-in：不调 meow_view_* 的 App
+ * 完全照旧（widget/activity/flush 不动）。页面模型 = 定案 b（顶层页切走 activity 栈，
+ * page_push/pop/replace 包装；不做页内子导航栈，sub_push/pop 为预留扩展位 a 桩）。
+ */
+#include "meow_ui.h"
+#include "meow_ui_internal.h"
+#include "meow_ui_view.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define MEOW_VIEW_BY_ID_MAX 32
+
+static meow_view *g_view_by_id[MEOW_VIEW_BY_ID_MAX];   /* id → 顶层页 view（page_push/pop 查找） */
+static meow_view *g_top_view = NULL;                    /* 当前进入的顶层页 view（生命周期跟踪） */
+
+static void run_fn(meow_view_fn f, meow_view *v)
+{
+    if (f) f(v, v->ctx);
+}
+
+/* 登记/清除 id→view 映射（幂等）。 */
+static void view_map_set(meow_view *v)
+{
+    if (!v) return;
+    int id = v->id;
+    if (id >= 0 && id < MEOW_VIEW_BY_ID_MAX) g_view_by_id[id] = v;
+}
+static void view_map_clear(meow_view *v)
+{
+    if (!v) return;
+    int id = v->id;
+    if (id >= 0 && id < MEOW_VIEW_BY_ID_MAX && g_view_by_id[id] == v) g_view_by_id[id] = NULL;
+}
+static meow_view *view_map_get(int id)
+{
+    return (id >= 0 && id < MEOW_VIEW_BY_ID_MAX) ? g_view_by_id[id] : NULL;
+}
+
+/* 进入一个 view（置 ENTERED + on_enter）。 */
+static void view_enter(meow_view *v)
+{
+    if (!v || (v->state & MEOW_VIEW_STATE_ENTERED)) return;
+    v->state |= MEOW_VIEW_STATE_ENTERED;
+    run_fn(v->hooks.on_enter, v);
+}
+/* 离开一个 view（清 ENTERED + on_leave；默认不销毁子 view/widget——弹回零重建）。 */
+static void view_leave(meow_view *v)
+{
+    if (!v || !(v->state & MEOW_VIEW_STATE_ENTERED)) return;
+    v->state &= ~MEOW_VIEW_STATE_ENTERED;
+    run_fn(v->hooks.on_leave, v);
+}
+
+/* ============================================================ */
+/* 生命周期                                                    */
+/* ============================================================ */
+meow_view *meow_view_create(int id, meow_view_type type,
+                            const meow_view_hooks *hooks, void *ctx)
+{
+    meow_view *v = (meow_view *)calloc(1, sizeof *v);
+    if (!v) return NULL;
+    v->id = id;
+    v->type = (type == MEOW_VIEW_CONTAINER) ? MEOW_VIEW_CONTAINER : MEOW_VIEW_ACTIVITY;
+    v->x = v->y = v->w = v->h = 0;
+    v->z = 0;
+    v->state = MEOW_VIEW_STATE_CREATED;
+    if (hooks) v->hooks = *hooks;
+    v->ctx = ctx;
+    view_map_set(v);
+    meow_draw_view_register(v);                 /* 登记为绘制物（on_draw 经 z 序重画触发） */
+    run_fn(v->hooks.on_create, v);
+    if (v->hooks.on_layout) run_fn(v->hooks.on_layout, v);   /* 布局：create 后跑一次 */
+    return v;
+}
+
+void meow_view_free(meow_view *v)
+{
+    if (!v) return;
+    if (v->state & MEOW_VIEW_STATE_ENTERED) view_leave(v);
+    run_fn(v->hooks.on_destroy, v);             /* 释放视图态资源 */
+    view_map_clear(v);
+    meow_draw_view_unregister(v);               /* 注销 z 序绘制物 */
+    for (int i = 0; i < v->nwidgets; i++)       /* 叶子控件 */
+        meow_widget_free(v->widgets[i]);
+    v->nwidgets = 0;
+    for (int i = 0; i < v->nchildren; i++)      /* 子 view 递归 */
+        meow_view_free(v->children[i]);
+    v->nchildren = 0;
+    free(v);
+}
+
+/* ============================================================ */
+/* 嵌套（组合视图树）                                          */
+/* ============================================================ */
+int meow_view_add_child(meow_view *parent, meow_view *child)
+{
+    if (!parent || !child || child == parent) return -1;
+    for (int i = 0; i < parent->nchildren; i++)
+        if (parent->children[i] == child) return -1;   /* 去重 */
+    if (parent->nchildren >= MEOW_VIEW_MAX_CHILD) return -1;
+    parent->children[parent->nchildren++] = child;
+    child->parent = parent;
+    return 0;
+}
+
+int meow_view_add_widget(meow_view *v, meow_widget *w)
+{
+    if (!v || !w) return -1;
+    for (int i = 0; i < v->nwidgets; i++)
+        if (v->widgets[i] == w) return -1;
+    if (v->nwidgets >= MEOW_VIEW_MAX_WIDGET) return -1;
+    v->widgets[v->nwidgets++] = w;
+    meow_draw_widget_set_view(w, v);   /* z 深度源 = view 树；重算 auto z */
+    return 0;
+}
+
+void meow_view_set_z(meow_view *v, int z)
+{
+    if (!v) return;
+    v->z = (z < 0) ? 0 : z;
+    meow_draw_view_set_z(v, v->z);
+}
+int meow_view_z(const meow_view *v)
+{
+    return v ? v->z : 0;
+}
+
+/* ============================================================ */
+/* 页面导航（包装 activity 栈——唯一驱动 on_enter/on_leave）      */
+/* ============================================================ */
+void meow_view_page_push(int id)
+{
+    meow_view *cur = g_top_view;
+    meow_view *next = view_map_get(id);
+    if (cur && cur != next) view_leave(cur);
+    meow_ui_activity_push(id);
+    view_enter(next);
+    g_top_view = next ? next : cur;
+}
+
+void meow_view_page_pop(void)
+{
+    meow_view *cur = g_top_view;
+    view_leave(cur);
+    meow_ui_activity_pop();
+    meow_view *next = view_map_get(meow_ui_activity_active());
+    view_enter(next);
+    g_top_view = next ? next : NULL;
+}
+
+/* 说明（诚实）：replace 假定目标页已由 App 先 meow_view_create 指定 id 建好；本批不销毁旧页
+ * 对象（保留弹回），仅 leave+enter 切换——与设计「leave+destroy 当前」的差异见汇报。 */
+void meow_view_page_replace(int id)
+{
+    meow_view *cur = g_top_view;
+    meow_view *next = view_map_get(id);
+    if (cur && cur != next) view_leave(cur);
+    view_enter(next);
+    g_top_view = next ? next : cur;
+}
+
+/* ---- 页内子导航（预留扩展位 a 桩：本批不实现，仅返回占位）---- */
+int meow_view_sub_push(meow_view *v, meow_view *sub)
+{
+    (void)v; (void)sub;
+    return 0;   /* 预留：将来在 ACTIVITY view 内维护子栈 */
+}
+meow_view *meow_view_sub_pop(meow_view *v)
+{
+    (void)v;
+    return NULL;   /* 预留 */
+}
+
+/* ============================================================ */
+/* 坐标 / 查询                                                  */
+/* ============================================================ */
+int meow_view_screen_x(const meow_view *v)
+{
+    int x = v ? v->x : 0;
+    const meow_view *p = v ? v->parent : NULL;
+    while (p) { x += p->x; p = p->parent; }
+    return x;
+}
+int meow_view_screen_y(const meow_view *v)
+{
+    int y = v ? v->y : 0;
+    const meow_view *p = v ? v->parent : NULL;
+    while (p) { y += p->y; p = p->parent; }
+    return y;
+}
+
+meow_view *meow_view_parent(const meow_view *v) { return v ? v->parent : NULL; }
+int meow_view_get_state(const meow_view *v) { return v ? (int)v->state : 0; }
diff --git a/patch_v2/sdk/meow_ui_view.h b/patch_v2/sdk/meow_ui_view.h
new file mode 100644
index 0000000..0b221b9
--- /dev/null
+++ b/patch_v2/sdk/meow_ui_view.h
@@ -0,0 +1,98 @@
+/*
+ * meow_ui_view.h — SDK 视图/页面框架（meow_view，嵌套容器 + 生命周期 + 事件路由）。
+ *
+ * 源：devdocs/plan/SDK_VIEW_FRAMEWORK_DESIGN.md §A。本文件为机制 ABI（结构 + 生命周期钩子 +
+ * 页面导航包装），与 z 序绘制物注册表（meow_ui_draw.c，§C/§6.2）协同：
+ *   - meow_view 是**薄壳**：容器 + 生命周期 + 事件路由；叶子仍是 meow_widget（不改）。
+ *   - on_draw 是回调，view 不缓存像素（非保留）；重绘由 meow_ui_invalidate 触发。
+ *   - opt-in：不调用 meow_view_* 的 App 完全照旧（widget/activity/flush 不动）。
+ *   - z 深度源 = view 树（parent/children 深度）；叶子 widget 深度 = 所属 view 深度 + 1。
+ *
+ * 页面模型（定案 b，预留 a）：顶层页切换仍由 activity 栈（meow_view_page_push/pop/replace 包装），
+ * 不做页内子导航栈；meow_view_sub_push/pop 为将来扩展位（仅在一个 ACTIVITY view 内维护子栈）。
+ */
+#ifndef MEOW_UI_VIEW_H
+#define MEOW_UI_VIEW_H
+
+#include "meow_ui.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct meow_view meow_view;
+
+typedef enum { MEOW_VIEW_ACTIVITY = 0, MEOW_VIEW_CONTAINER = 1 } meow_view_type;
+typedef enum {
+    MEOW_VIEW_STATE_CREATED = 1u << 0,
+    MEOW_VIEW_STATE_ENTERED = 1u << 1,
+    MEOW_VIEW_STATE_DIRTY   = 1u << 2,
+} meow_view_state;
+
+/* 生命周期/事件钩子（on_create→on_enter→(事件循环)→on_leave→on_destroy + on_layout）。
+ * 均以 view 自身 + ctx（=视图控制器，业务-UI 绑定点）为参。可 NULL。 */
+typedef void (*meow_view_fn)(meow_view *v, void *ctx);
+typedef int  (*meow_view_ev_fn)(meow_view *v, int ev, int a, int b, void *ctx);
+typedef void (*meow_view_draw_fn)(meow_view *v, const meow_theme *th, void *ctx);
+
+typedef struct meow_view_hooks {
+    meow_view_fn      on_create;   /* 建 view 后跑一次（分配视图态/初始布局） */
+    meow_view_fn      on_enter;    /* 页面进入（push/replace 后；回页面自动恢复零重建） */
+    meow_view_fn      on_leave;    /* 页面离开（pop/replace 前；默认不销毁子 view/widget） */
+    meow_view_fn      on_destroy;  /* meow_view_free 释放（递归）时跑 */
+    meow_view_fn      on_layout;   /* 布局（on_create/page_push 后跑一次，算子控件绝对坐标） */
+    meow_view_draw_fn on_draw;     /* 绘制回调（非保留；由 meow_ui_invalidate 触发） */
+    meow_view_ev_fn   on_event;    /* 事件路由（可 NULL；先发后代按 z 降序，命中即消费） */
+} meow_view_hooks;
+
+#define MEOW_VIEW_MAX_CHILD  16
+#define MEOW_VIEW_MAX_WIDGET 32
+
+struct meow_view {
+    int type;             /* MEOW_VIEW_ACTIVITY / MEOW_VIEW_CONTAINER */
+    int id;               /* 页面/视图 id（App 命名的稳定值；= page_push 用的 id） */
+    int x, y, w, h;       /* 自身坐标（相对父内容原点；子 view 默认占满，叠放由 z 排） */
+    meow_view *parent;
+    meow_view *children[MEOW_VIEW_MAX_CHILD];
+    int nchildren;
+    meow_widget *widgets[MEOW_VIEW_MAX_WIDGET];   /* 叶子控件（直接挂本 view） */
+    int nwidgets;
+    int z;                /* 显式 z（meow_view_set_z）；0=未设（由子/注册表推导） */
+    unsigned state;       /* meow_view_state 位掩码 */
+    meow_view_hooks hooks;
+    void *ctx;            /* 视图控制器（biz-UI 绑定点） */
+};
+
+/* ---- 生命周期 ---- */
+meow_view *meow_view_create(int id, meow_view_type type,
+                            const meow_view_hooks *hooks, void *ctx);
+void       meow_view_free(meow_view *v);      /* 递归 on_destroy + widget_free 叶子 + 注销 z 序 */
+
+/* ---- 嵌套（组合视图树）---- */
+int  meow_view_add_child(meow_view *parent, meow_view *child);   /* 任意深挂子 view；0/负=结果 */
+int  meow_view_add_widget(meow_view *v, meow_widget *w);         /* 挂叶子控件（登记 z 深度源） */
+void meow_view_set_z(meow_view *v, int z);    /* 显式 z（999 置顶）；影响其绘制物 z */
+int  meow_view_z(const meow_view *v);
+
+/* ---- 页面导航（包装 activity 栈，唯一驱动 on_enter/on_leave——单一入口，App 不再分别调）----
+ * 顶层页切换走 activity 栈；页内子导航为预留（见设计定案 b）。 */
+void meow_view_page_push(int id);              /* activity_push + 旧top on_leave + 新页 on_enter */
+void meow_view_page_pop(void);                 /* 旧top on_leave + activity_pop + 新top on_enter */
+void meow_view_page_replace(int id);           /* 旧top on_leave + 新页 on_enter（目标页须已 create） */
+
+/* ---- 页内子导航（预留扩展位 a；本批为空实现/桩，仅在 ACTIVITY view 内维护子栈）---- */
+int  meow_view_sub_push(meow_view *v, meow_view *sub);   /* 预留；返回 0（未实现于本批） */
+meow_view *meow_view_sub_pop(meow_view *v);              /* 预留；返回 NULL（未实现于本批） */
+
+/* ---- 坐标：view 相对父内容原点的累计（父坐标链求和 → 屏幕绝对坐标）---- */
+int meow_view_screen_x(const meow_view *v);
+int meow_view_screen_y(const meow_view *v);
+
+/* ---- 查询 ---- */
+meow_view *meow_view_parent(const meow_view *v);
+int        meow_view_get_state(const meow_view *v);   /* MEOW_VIEW_STATE_* 位掩码 */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* MEOW_UI_VIEW_H */
diff --git a/patch_v2/sdk/meow_ui_widget.c b/patch_v2/sdk/meow_ui_widget.c
index c6a473f..0881ae8 100644
--- a/patch_v2/sdk/meow_ui_widget.c
+++ b/patch_v2/sdk/meow_ui_widget.c
@@ -211,10 +211,16 @@ static meow_widget *live_btn_hit(int x, int y)
     return r;
 }
 
-/* 重绘并局部刷新一个按钮区（绘制内部调 meow_gfx_fill_round 已标脏；flush_region 合区+上屏）。 */
+/* 重绘并局部刷新一个按钮区。
+ * §6.2 收敛：若按钮已注册绘制物 → 走 meow_ui_invalidate（清底 + 按 z 重画重叠区完整 z 栈），
+ * 避免按钮压上层 chrome 时被单控件 flush 抹掉（P1）；未注册则回退单控件绘制+区域上屏。 */
 static void live_btn_redraw(meow_widget *w)
 {
     if (!w) return;
+    if (meow_draw_widget_registered(w)) {
+        meow_ui_invalidate(w->x, w->y, w->w, w->h);
+        return;
+    }
     meow_widget_draw(w);
     meow_ui_flush_region(w->x, w->y, w->w, w->h);
 }
@@ -275,6 +281,7 @@ meow_widget *meow_btn_create(int x, int y, int w, int h, const char *label)
     t->state = MEOW_WS_ENABLED;             /* §5.8.3：默认 ENABLED */
     if (label) { strncpy(t->label, label, sizeof t->label - 1); t->label[sizeof t->label - 1] = 0; }
     live_btn_register(t);
+    meow_draw_widget_register(t);   /* §6.2 自动注册（创建即注册，App 零调用） */
     return t;
 }
 
@@ -286,6 +293,7 @@ meow_widget *meow_slider_create(int x, int y, int w, int min, int max, int val)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->min = min; t->max = (max > min) ? max : min + 1; t->val = (val < min) ? min : (val > t->max) ? t->max : val;
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -298,6 +306,7 @@ meow_widget *meow_switch_create(int x, int y, int on)
     t->state = MEOW_WS_ENABLED;
     t->on = on ? 1 : 0;
     if (t->on) t->state |= MEOW_WS_SELECTED;   /* §5.8.3：开关 on → selected */
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -310,12 +319,14 @@ meow_widget *meow_list_create(int x, int y, int w, int h, int count,
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->count = count; t->src = src; t->ctx = ctx; t->sel = 0;
+    meow_draw_widget_register(t);
     return t;
 }
 
 void meow_widget_free(meow_widget *w)
 {
     if (!w) return;
+    meow_draw_widget_unregister(w);   /* §6.2：绘制物注册表自动注销（stale id 失效勿用） */
     live_btn_unregister(w);
     free(w);
 }
@@ -334,6 +345,7 @@ meow_widget *meow_widget_custom_create(int x, int y, int w, int h,
     t->render_cb = render_cb;
     t->hit_cb = hit_cb;
     t->ctx = ctx;
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -346,6 +358,7 @@ meow_widget *meow_row_create(int x, int y, int w, int h, int spacing)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->spacing = spacing > 0 ? spacing : 0;
+    meow_draw_widget_register(t);
     return t;
 }
 meow_widget *meow_column_create(int x, int y, int w, int h, int spacing)
@@ -356,6 +369,7 @@ meow_widget *meow_column_create(int x, int y, int w, int h, int spacing)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->spacing = spacing > 0 ? spacing : 0;
+    meow_draw_widget_register(t);
     return t;
 }
 meow_widget *meow_box_create(int x, int y, int w, int h)
@@ -366,6 +380,7 @@ meow_widget *meow_box_create(int x, int y, int w, int h)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->spacing = 0;
+    meow_draw_widget_register(t);
     return t;
 }
 meow_widget *meow_layout_spacer(int w, int h)
@@ -375,6 +390,7 @@ meow_widget *meow_layout_spacer(int w, int h)
     t->type = W_SPACER; t->x = 0; t->y = 0; t->w = w > 0 ? w : 0; t->h = h > 0 ? h : 0;
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -421,6 +437,24 @@ void meow_layout_arrange(meow_widget *layout)
     }
 }
 
+/* ---- 布局深度反推访问器（meow_ui_draw.c 用，读本 TU 的 struct meow_widget 内部字段）---- */
+int meow_widget_is_layout(const meow_widget *w)
+{ return w && w->type == W_LAYOUT; }
+int meow_widget_nchild(const meow_widget *w)
+{ return (w && w->type == W_LAYOUT) ? w->nchildren : 0; }
+const meow_widget *meow_widget_child_at(const meow_widget *w, int idx)
+{ return (w && w->type == W_LAYOUT && idx >= 0 && idx < w->nchildren) ? w->children[idx] : NULL; }
+
+/* ---- 几何/归属访问器（meow_ui_draw.c 用：绘制物 rect 实时读 + owner 过滤）---- */
+int meow_widget_owner(const meow_widget *w)
+{ return w ? w->owner : 0; }
+void meow_widget_rect(const meow_widget *w, int out[4])
+{
+    if (!out) return;
+    if (!w) { out[0] = out[1] = out[2] = out[3] = 0; return; }
+    out[0] = w->x; out[1] = w->y; out[2] = w->w; out[3] = w->h;
+}
+
 /* ============================================================ */
 /* §5.8.6 batch2 Material 组件子集 API（create/setter/getter/hit） */
 /* ============================================================ */
@@ -460,6 +494,7 @@ meow_widget *meow_textfield_create(int x, int y, int w, int h, const char *place
     t->buf = buf; t->buflen = buf ? (int)strlen(buf) : 0;
     t->maxlen = (maxlen > 0 && maxlen <= 256) ? maxlen : 256;
     t->ime_mode = mode;
+    meow_draw_widget_register(t);
     return t;
 }
 void meow_textfield_set_placeholder(meow_widget *w, const char *placeholder)
@@ -515,6 +550,7 @@ meow_widget *meow_card_create(int x, int y, int w, int h)
     t->type = W_CARD; t->x = x; t->y = y; t->w = w; t->h = h;
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
+    meow_draw_widget_register(t);
     return t;
 }
 void meow_card_set_content(meow_widget *card, meow_widget *child)
@@ -535,6 +571,7 @@ meow_widget *meow_divider_create(int x, int y, int len, int vertical)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->variant = vertical ? 1 : 0;
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -547,6 +584,7 @@ meow_widget *meow_badge_create(int cx, int cy)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->value = 0;   /* 红点 */
+    meow_draw_widget_register(t);
     return t;
 }
 void meow_badge_set(meow_widget *w, int count)
@@ -564,6 +602,7 @@ meow_widget *meow_checkbox_create(int x, int y)
     t->type = W_CHECKBOX; t->x = x; t->y = y; t->w = 34; t->h = 34;
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
+    meow_draw_widget_register(t);
     return t;
 }
 meow_widget *meow_radio_create(int x, int y)
@@ -573,6 +612,7 @@ meow_widget *meow_radio_create(int x, int y)
     t->type = W_RADIO; t->x = x; t->y = y; t->w = 34; t->h = 34;
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -586,6 +626,7 @@ meow_widget *meow_progress_create(int x, int y, int w, int h, int value)
     t->state = MEOW_WS_ENABLED;
     t->variant = 0;   /* 线性 */
     t->value = value < 0 ? -1 : (value > 100 ? 100 : value);
+    meow_draw_widget_register(t);
     return t;
 }
 meow_widget *meow_progress_circular_create(int cx, int cy, int r, int value)
@@ -603,6 +644,7 @@ meow_widget *meow_progress_circular_create(int cx, int cy, int r, int value)
     t->state = MEOW_WS_ENABLED;
     t->variant = 1;   /* 圆形 */
     t->value = value < 0 ? -1 : (value > 100 ? 100 : value);
+    meow_draw_widget_register(t);
     return t;
 }
 void meow_progress_set(meow_widget *w, int value)
@@ -621,6 +663,7 @@ meow_widget *meow_fab_create(int x, int y, int size, const char *label)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     if (label) { strncpy(t->label, label, sizeof t->label - 1); t->label[sizeof t->label - 1] = 0; }
+    meow_draw_widget_register(t);
     return t;
 }
 
@@ -634,6 +677,7 @@ meow_widget *meow_topappbar_create(int x, int y, int w, int h, const char *title
     t->state = MEOW_WS_ENABLED;
     t->back_on = 0; t->nitems = 0;
     if (title) { strncpy(t->label, title, sizeof t->label - 1); t->label[sizeof t->label - 1] = 0; }
+    meow_draw_widget_register(t);
     return t;
 }
 void meow_topappbar_set_title(meow_widget *w, const char *title)
@@ -682,6 +726,7 @@ meow_widget *meow_navigationbar_create(int x, int y, int w, int h)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->nitems = 0; t->selected = 0;
+    meow_draw_widget_register(t);
     return t;
 }
 int meow_navigationbar_add_item(meow_widget *w, const char *label)
@@ -721,6 +766,7 @@ meow_widget *meow_tabbar_create(int x, int y, int w, int h)
     t->owner = meow_ui_activity_active();
     t->state = MEOW_WS_ENABLED;
     t->nitems = 0; t->selected = 0;
+    meow_draw_widget_register(t);
     return t;
 }
 int meow_tabbar_add_tab(meow_widget *w, const char *label)
diff --git a/patch_v2/sdk/test_ime_fix.c b/patch_v2/sdk/test_ime_fix.c
index ba170aa..74f5891 100644
--- a/patch_v2/sdk/test_ime_fix.c
+++ b/patch_v2/sdk/test_ime_fix.c
@@ -8,6 +8,7 @@
  *   gcc -Wall -Wextra -o test_ime_fix test_ime_fix.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
  */
 #include "meow_ui.h"
diff --git a/patch_v2/sdk/test_meow_ui_widgets.c b/patch_v2/sdk/test_meow_ui_widgets.c
index 4b1b447..18d4c59 100644
--- a/patch_v2/sdk/test_meow_ui_widgets.c
+++ b/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）
  */
diff --git a/patch_v2/sdk/test_p1p2p3_repro.c b/patch_v2/sdk/test_p1p2p3_repro.c
index eaefad4..f8e89f2 100644
--- a/patch_v2/sdk/test_p1p2p3_repro.c
+++ b/patch_v2/sdk/test_p1p2p3_repro.c
@@ -18,12 +18,13 @@
  *       -o test_p1p2p3_repro test_p1p2p3_repro.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_img.c meow_ui_config.c meow_ui_notify.c meow_notify_ipc.c stb_image.c \
+ *       meow_ui_img.c meow_ui_config.c meow_ui_notify.c meow_notify_ipc.c meow_ui_draw.c \
+ *       meow_ui_view.c stb_image.c \
  *       -I. -I../hello_app -I../meow_launcherd -pthread -lm
  * 运行：MEOW_UI_DUMP=/tmp/repro.ppm ./test_p1p2p3_repro   （optional，dump 最终屏幕）
  *
- * 修复前（无 P1/P2/P3 修法）预期输出：RESULT: 4 FAIL(S)；
- * 修复后：RESULT: ALL PASS。
+ * 覆盖（批次① z 序下沉后）：P1c 显式 z 置顶（set_z(g_fab,999)+invalidate(r_prc) 不抹 FAB——
+ * 显式 z 不依赖绘制先后）+ P2/P3 与迁移前一致。预期 RESULT: ALL PASS。
  */
 #include "meow_ui.h"
 #include "meow_ui_internal.h"
@@ -74,13 +75,15 @@ int main(void)
 
     int fails = 0;
 
-    /* ================= P1：局部重绘不盖浮层（FAB） =================
-     * 场景：scroll=0 时圆形进度(413..453,605..645) 与 FAB(406..462,616..672) 重叠。
-     * demo_paint 先画内容后画 chrome → 场景正确 FAB 在上。随后「局部重绘进度条」：
+    /* ================= P1 / P1c：局部重绘不盖浮层（FAB，须显式置顶） =================
+     * 场景：scroll=0 时圆形进度 r_prc(413..453,605..645) 与 FAB(406..462,616..672) 重叠。
+     * demo_paint 整帧后 FAB 在上（demo_init set_z(g_fab,999) 显式置顶）。随后「局部重绘进度条」：
      *   旧（清底+只画进度条+flush 其矩形）→ FAB 重叠区被清掉；
-     *   新（清底+重画重叠区内所有控件=hello d_redraw/d_paint_region）→ FAB 保持。 */
+     *   新（SDK meow_ui_invalidate：清底 + 按 z 重画重叠区完整 z 栈）→ FAB 保持。
+     * P1c：set_z(g_fab,999) 后 invalidate(r_prc)，断言 FAB 重叠点(434,622) 仍=demo_paint 后值
+     *     （显式 z 不依赖绘制先后——置顶在重绘前显式给出，下层重绘不抹上层）。 */
     demo_paint();
-    int fx = r_fab.x + 28, fy = r_fab.y + 6;   /* FAB 内、远离 "+" 文本处 */
+    int fx = r_fab.x + 28, fy = r_fab.y + 6;   /* FAB 内、远离 "+" 文本处 → (434,622) */
     int s0r, s0g, s0b; rd_px(fx, fy, &s0r, &s0g, &s0b);
     printf("P1 scene (demo_paint) FAB-overlap "); pr_px("scene", fx, fy);
     if (is_bg(s0r, s0g, s0b))
@@ -98,15 +101,16 @@ int main(void)
     if (is_bg(obr, obg, obb)) printf("   [BUG-CONFIRMED] old path erased FAB overlap (bg)\n");
     else printf("   [note] old path did NOT erase FAB here (color %02X%02X%02X)\n", obr, obg, obb);
 
-    /* 新式局部重绘（真实 hello d_redraw → d_paint_region，重画重叠栈）*/
+    /* P1c：显式置顶 + SDK 局部重画（invalidate 按 z 重画重叠栈） */
     demo_paint();                                     /* 还原场景 */
+    meow_widget_set_z(g_fab, 999);                    /* 重新显式置顶（P1c 要求） */
     meow_progress_set(g_dprc, 30);
-    d_redraw(g_dprc, r_prc);                          /* hello 的局部重绘入口 */
+    meow_ui_invalidate(r_prc.x, r_prc.y, r_prc.w, r_prc.h);
     int nbr, nbg, nbb; rd_px(fx, fy, &nbr, &nbg, &nbb);
-    printf("P1 new-partial (d_redraw stack) "); pr_px("new", fx, fy);
+    printf("P1c set_z(999)+invalidate(r_prc) "); pr_px("p1c", fx, fy);
     if (near(s0r, nbr) && near(s0g, nbg) && near(s0b, nbb))
-        printf("   P1-PASS FAB preserved over live progress redraw\n");
-    else { printf("   P1-FAIL FAB not preserved (scene %02X%02X%02X vs new %02X%02X%02X)\n",
+        printf("   P1-PASS explicit z:FAB preserved over live progress redraw\n");
+    else { printf("   P1-FAIL FAB not preserved (scene %02X%02X%02X vs p1c %02X%02X%02X)\n",
                   s0r, s0g, s0b, nbr, nbg, nbb); fails++; }
 
     /* ================= P2：列表焦点按本次触摸绑定/释放 =================
@@ -128,7 +132,7 @@ int main(void)
     printf("P3 list rect = (%d,%d,%d,%d)\n", r_list.x, r_list.y, r_list.w, r_list.h);
     /* 顶部泄漏：选中行0 + scroll=20 → 行0 ry=top-20，填充越顶泄漏 */
     meow_list_set_selected(g_dlc, 0); meow_list_set_scroll(g_dlc, 20);
-    d_redraw(g_dlc, r_list);
+    meow_ui_invalidate(r_list.x, r_list.y, r_list.w, r_list.h);
     int ux = r_list.x + 10, uy = r_list.y - 5;        /* 列表顶上方 5px（标题间隙） */
     int ur, ug, ub; rd_px(ux, uy, &ur, &ug, &ub);
     printf("P3 top-leak "); pr_px("above-top", ux, uy);
@@ -136,7 +140,7 @@ int main(void)
     else { printf("   P3-top-FAIL leaked into title gap\n"); fails++; }
     /* 底部泄漏：选中行4 + scroll=20 → 行4 ry=590..630 越底泄漏 */
     meow_list_set_selected(g_dlc, 4); meow_list_set_scroll(g_dlc, 20);
-    d_redraw(g_dlc, r_list);
+    meow_ui_invalidate(r_list.x, r_list.y, r_list.w, r_list.h);
     int dx = r_list.x + 10, dy_ = r_list.y + r_list.h + 5;  /* 列表底下方 5px */
     int dr, dg, db; rd_px(dx, dy_, &dr, &dg, &db);
     printf("P3 bot-leak "); pr_px("below-bottom", dx, dy_);
diff --git a/patch_v2/sdk/test_sdk_fixes.c b/patch_v2/sdk/test_sdk_fixes.c
index e2a3401..311396c 100644
--- a/patch_v2/sdk/test_sdk_fixes.c
+++ b/patch_v2/sdk/test_sdk_fixes.c
@@ -10,6 +10,7 @@
  *   gcc -Wall -o test_sdk_fixes test_sdk_fixes.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
  */
 #include "meow_ui.h"