diff --git a/hello b/hello
index f83ff87..d770cf4 100755
Binary files a/hello and b/hello differ
diff --git a/hello.c b/hello.c
index 5178d91..396fd7e 100644
--- a/hello.c
+++ b/hello.c
@@ -3,12 +3,15 @@
  * 契约（MEOW_APP_SDK.md §1/§3/§6）：应用只调 meow_ui API —— 屏幕（back_buf +
  * flush 上屏）与输入（meow_ui_run 事件循环）由框架接管；不再 open/mmap/ioctl
  * /dev/fb0、不再读 /dev/input/event*。本应用验证「清屏 + 画文本 + 画按钮 +
- * 响应触摸」这一最小工作闭环。
+ * 响应触摸」这一最小工作闭环，并集成了通知触发按钮（meow_notify_send，§9.1）
+ * 用于端到端测试通知链路（SDK → IPC → launcher 中央存储 → 10s TTL 落盘）。
  *
  * 交互：
  *   - 点按钮 → tap 计数 +1（按钮标签实时更新）；
+ *   - 通知触发行（6 个按钮）：每个点击 meow_notify_send() 发一条不同参数的通知，
+ *     覆盖 普通INFO / 媒体(单例) / HIGH紧急度 / 进度(40%) / 常驻 / 跳转Activity；
+ *   - CANCEL LAST 按钮：meow_notify_cancel(最近一次 send 的 id)；
  *   - 左缘左滑（抬手触发）→ 请求退出（回应用列表）；滑动过程顶部出现随位移增长的进度条；
- *   - 物理键 POWER 不再映射 exit（§3.4.1：物理键系统统一管理，电源键=纯息屏/亮屏）；
  *   - 空闲时 on_tick 每秒刷新一行状态（含运行秒数）。
  *
  * 宿主/qemu 离屏：设 MEOW_UI_DUMP=<ppm 路径> 时，首帧 flush 即把 back_buf 写成
@@ -26,6 +29,12 @@
 #include <time.h>
 
 static meow_widget *g_btn;
+static meow_widget *g_nbtn[6];      /* 通知触发按钮行 */
+static meow_widget *g_cancel;       /* 取消最近一条通知 */
+static meow_widget *g_fs_btn;       /* FULLSCREEN 进入按钮（主界面） */
+static int   g_fullscreen = 0;      /* 1=处于全屏视图（点任意处退出回主界面） */
+static const char *g_notif_labels[6] = { "INFO", "MEDIA", "HIGH", "PROG", "ONGO", "TGT" };
+static uint32_t g_last_notif = 0;   /* 最近一次 send 返回的 id，供 cancel */
 static int   g_taps = 0;
 static int   g_secs = 0;
 static char  g_btn_label[32] = "TAP ME";
@@ -34,23 +43,152 @@ static char  g_btn_label[32] = "TAP ME";
  * 删除自造轮子的 hellolog()（自读 MEOW_LOG_DIR + snprintf + fopen/fprintf）。 */
 static void on_sigterm(int s) { (void)s; meow_ui_request_exit(); }
 
+/* 通知触发：对应第 which 个按钮（0..5）。SDK 端 meow_notify_send() 自动注册未声明
+ * 类型（本应用用到 4 种：GENERAL / MEDIA / PROGRESS / MESSAGE，均在 4 种上限内），
+ * 超时语义见 meow_ui.h §9.1；媒体类型为单例（重发替换）。 */
+static void notif_send(int which)
+{
+    meow_notify n;
+    memset(&n, 0, sizeof n);
+    n.progress    = -1;                     /* 缺省不显示进度条 */
+    n.timeout_ms  = MEOW_NOTIFY_TIMEOUT_NEVER;
+    n.urgency     = MEOW_NOTIFY_URG_NORMAL;
+    const char *label = "?";
+
+    switch (which) {
+    case 0: /* 普通 INFO */
+        label = "INFO";
+        n.cat = MEOW_NOTIFY_CAT_GENERAL;
+        n.title = "测试-普通通知";
+        n.body = "普通 INFO 通知，timeout=5000ms";
+        n.timeout_ms = 5000;
+        break;
+    case 1: /* 媒体单例（ongoing，不自动过期） */
+        label = "MEDIA";
+        n.cat = MEOW_NOTIFY_CAT_MEDIA;
+        n.urgency = MEOW_NOTIFY_URG_LOW;
+        n.title = "测试-媒体通知";
+        n.body = "媒体单例，正在播放，timeout=-1 常驻";
+        n.timeout_ms = MEOW_NOTIFY_TIMEOUT_ONGOING;
+        break;
+    case 2: /* HIGH 紧急度 */
+        label = "HIGH";
+        n.cat = MEOW_NOTIFY_CAT_GENERAL;
+        n.urgency = MEOW_NOTIFY_URG_HIGH;
+        n.title = "测试-紧急度HIGH";
+        n.body = "高紧急度：顶部横幅+提示音";
+        n.timeout_ms = 3000;
+        break;
+    case 3: /* 进度通知 */
+        label = "PROG";
+        n.cat = MEOW_NOTIFY_CAT_PROGRESS;
+        n.title = "测试-进度通知";
+        n.body = "下载进度 40%";
+        n.timeout_ms = 8000;
+        n.progress = 40;
+        break;
+    case 4: /* 常驻（timeout=-1，不自动过期，需手动取消） */
+        label = "ONGO";
+        n.cat = MEOW_NOTIFY_CAT_GENERAL;
+        n.title = "测试-常驻通知";
+        n.body = "常驻不自动过期（timeout=-1），需手动取消";
+        n.timeout_ms = MEOW_NOTIFY_TIMEOUT_ONGOING;
+        break;
+    case 5: /* 带 target_activity（SDK 结构暂无 icon 字段，故只填跳转目标） */
+        label = "TGT";
+        n.cat = MEOW_NOTIFY_CAT_MESSAGE;
+        n.title = "测试-跳转Activity";
+        n.body = "点击跳转 target_activity=main";
+        n.timeout_ms = 6000;
+        n.target_activity = "main";
+        break;
+    default:
+        return;
+    }
+
+    uint32_t id = meow_notify_send(&n);
+    g_last_notif = id;
+    meow_log(MEOW_LOG_INFO,
+             "notify btn=%s id=%u cat=%s urg=%s tmo=%d prog=%d target=%s title=%s",
+             label, (unsigned)id, meow_notify_category_str(n.cat),
+             meow_notify_urgency_str(n.urgency), n.timeout_ms, n.progress,
+             n.target_activity ? n.target_activity : "-",
+             n.title ? n.title : "-");
+}
+
+static void notif_cancel(void)
+{
+    int r = meow_notify_cancel(g_last_notif);
+    meow_log(MEOW_LOG_INFO, "notify cancel id=%u result=%d", (unsigned)g_last_notif, r);
+    g_last_notif = 0;
+}
+
+/* 进入/退出全屏视图（MeowOS 全屏机制，§3.1）：
+ *   - fullscreen(1) + collapsed(1)：状态栏「上收出屏只留提示线」（不完全沉浸，inset=4px），
+ *     顶部提示线热区仍可下拉，左缘返回手势（app 已注册 on_swipe）仍生效——SDK 自动处理，非 app 拦截；
+ *   - fullscreen(0) + collapsed(0)：恢复整条状态栏主界面。
+ * SDK 基座默认瞬切（g_sbar_collapse_anim_ms=0）；如需过渡动画可先 meow_ui_statusbar_animate(ms)。 */
+static void set_fullscreen(int on)
+{
+    g_fullscreen = on ? 1 : 0;
+    meow_ui_set_fullscreen(g_fullscreen);
+    meow_ui_statusbar_set_collapsed(g_fullscreen);
+    meow_log(MEOW_LOG_INFO, g_fullscreen ? "fullscreen ON (collapsed)" : "fullscreen OFF (restore)");
+}
+
 static void redraw(void)
 {
     const meow_theme *th = meow_theme_get();
     int sb = meow_ui_statusbar_height();   /* A-0 全局状态栏 inset：内容下移避免被盖 */
+    if (g_fullscreen) {
+        /* 全屏页：纯色占满 + 居中提示；点任意处 / 左缘左滑（SDK on_swipe）返回 */
+        meow_ui_clear(th->accent);
+        meow_ui_text_center(240, 330, "FULLSCREEN ACTIVE", 28, 0xFFFFFF);
+        meow_ui_text_center(240, 366, "tap anywhere = back to home", 20, 0xFFFFFF);
+        meow_ui_text_center(240, 394, "(left-edge swipe also returns)", 20, 0xFFFFFF);
+        meow_ui_flush();
+        return;
+    }
     meow_ui_clear(th->bg);
     meow_ui_text_center(240, sb + 8, "MEOWOS HELLO", 28, th->fg);
     meow_ui_text_center(240, sb + 38, "SDK: meow_ui.a", 20, th->dim);
     meow_widget_draw(g_btn);
+    meow_ui_text_center(240, 372, "tap = send notification (see log)", 20, th->dim);
+    for (int i = 0; i < 6; i++) meow_widget_draw(g_nbtn[i]);
+    meow_widget_draw(g_cancel);
+    meow_widget_draw(g_fs_btn);
     char line[64];
     snprintf(line, sizeof line, "taps=%d   uptime=%ds", g_taps, g_secs);
-    meow_ui_text_center(240, 500, line, 20, th->dim);
+    meow_ui_text_center(240, 516, line, 20, th->dim);
     meow_ui_text(20, 660, "left-swipe = exit", 20, th->dim);
     meow_ui_flush();
 }
 
 static void on_tap(int x, int y)
 {
+    if (g_fullscreen) {
+        /* 全屏页：点任意处退出回主界面（左缘左滑由 SDK on_swipe 处理，见下） */
+        set_fullscreen(0);
+        redraw();
+        return;
+    }
+    for (int i = 0; i < 6; i++) {
+        if (meow_widget_hit(g_nbtn[i], x, y)) {
+            notif_send(i);
+            redraw();
+            return;
+        }
+    }
+    if (meow_widget_hit(g_cancel, x, y)) {
+        notif_cancel();
+        redraw();
+        return;
+    }
+    if (meow_widget_hit(g_fs_btn, x, y)) {
+        set_fullscreen(1);
+        redraw();
+        return;
+    }
     if (meow_widget_hit(g_btn, x, y)) {
         g_taps++;
         snprintf(g_btn_label, sizeof g_btn_label, "TAPPED x%d", g_taps);
@@ -107,11 +245,18 @@ int main(void)
     signal(SIGTERM, on_sigterm);   /* 看门狗返回键 → 干净退出 */
 
     g_btn = meow_btn_create(120, 300, 240, 64, g_btn_label);
+    for (int i = 0; i < 6; i++)
+        g_nbtn[i] = meow_btn_create(3 + i * 80, 400, 74, 56, g_notif_labels[i]);
+    g_cancel  = meow_btn_create(36, 464, 200, 42, "CANCEL LAST");
+    g_fs_btn  = meow_btn_create(244, 464, 200, 42, "FULLSCREEN");
     redraw();
 
     meow_ui_events ev = { on_key, on_tap, on_swipe, on_tick, on_swipe_progress };
     meow_ui_run(&ev);
 
+    for (int i = 0; i < 6; i++) meow_widget_free(g_nbtn[i]);
+    meow_widget_free(g_cancel);
+    meow_widget_free(g_fs_btn);
     meow_widget_free(g_btn);
     meow_ui_shutdown();
     meow_log(MEOW_LOG_INFO, "exit");