fix(statusbar): present() 尊重 inset — App进程不写顶条28px区, 根治进App顶条黑1s(agent-145)

- 根因: App首帧 present() 全屏拷贝 meow_ui_gfx.c:739 把顶条区写成黑(g_back_buf新缓冲顶条行未初始化)→覆盖launcher叠画顶条; 下次叠加~1s后→黑1s
- 修: SDK present() 真实fb拷贝加 sb_clip 截断(App进程 !meow_ui_sys_render_enabled() 不写 ins 区[0,statusbar_height)); launcher(sb_clip=0)行为不变
- hello 零改动(SDK通用覆盖所有App); launcher立即预画(:9132)+1s刷新 结果不再被冲掉
- meow_ui.a=900205ea launcher=97b73cbf hello=91da9ab0 0warning; 宿主 test_sb_statusbar/test_sb_clamp ALL PASS
- ②App内下拉通知中心: 评估确认属 ④App内通知中心(M3)完整专项(launch_app不读触摸/输入移交竞态/SIGSTOP会话/不调meow_ipc_process), 未冒风险落固件, 标注M3

patch_v2/sdk/meow_ui_gfx.c

@@ -736,13 +736,37 @@ static void present(void)
     if (g_fb_mem) {
         ioctl(g_fb_fd, FBIO_WAITFORVSYNC, 0);   /* 等垂直同步 */
         unsigned long long tbg = now_ms();
+        /* 「同一个状态栏」闭环：App 进程不渲染状态栏（meow_ui_sys_render_enabled()==0），也绝不向
+         * 真实 fb 写顶条 inset 区（顶条由 launcher 系统进程叠加绘制）。否则 App 首帧全量拷贝
+         * （meow_ui_init 置 dirty_full）会把 launcher 刚叠画的顶条冲成未初始化数据——真机
+         * 「进入 App 顶条黑 1 秒再出现」。sb_clip = 本进程当前状态栏 inset（展开=28 / 收合=4 /
+         * 隐藏=0）：全量拷贝只拷 [sb, yres) 行；逐 dirty 矩形把上沿截断到 y>=sb，整块落在顶条区则跳过。
+         * 仅 App 进程（非系统 UI）截断；launcher（系统 UI）sb_clip=0，行为不变。 */
+        int sb_clip = 0;
+        if (!meow_ui_sys_render_enabled()) sb_clip = meow_ui_statusbar_height();
+        if (sb_clip < 0) sb_clip = 0;
+        if (sb_clip > g_yres) sb_clip = g_yres;
         if (g_dirty_full) {
-            memcpy(g_fb_mem, g_back_buf, (size_t)g_line * (size_t)g_yres);
+            if (sb_clip > 0) {
+                memcpy(g_fb_mem + (size_t)sb_clip * g_line,
+                       g_back_buf + (size_t)sb_clip * g_line,
+                       (size_t)g_line * (size_t)(g_yres - sb_clip));
+            } else {
+                memcpy(g_fb_mem, g_back_buf, (size_t)g_line * (size_t)g_yres);
+            }
         } else {
             int bppb = g_bpp / 8;
             for (int i = 0; i < g_ndirty; i++) {
-                int rw = g_dirty[i][2], ry = g_dirty[i][1];
+                int rw = g_dirty[i][2], ry = g_dirty[i][1], rh = g_dirty[i][3];
-                for (int yy = 0; yy < g_dirty[i][3]; yy++) {
+                if (sb_clip > 0) {
+                    if (ry + rh <= sb_clip) continue;        /* 整块在顶条 inset 区：App 不写 */
+                    if (ry < sb_clip) {                       /* 上沿与顶条区相交：截断到 sb_clip */
+                        rh -= (sb_clip - ry);
+                        ry  = sb_clip;
+                        if (rh <= 0 || rw <= 0) continue;
+                    }
+                }
+                for (int yy = 0; yy < rh; yy++) {
                     size_t off = (size_t)(ry + yy) * g_line + (size_t)g_dirty[i][0] * bppb;
                     memcpy(g_fb_mem + off, g_back_buf + off, (size_t)rw * bppb);
                 }