feat(sdk+launcher): SDK nav/media封装 + §10.5 App前台唤起通知中心 (agent-206) — meow_ui_nav.c(env栈初始化+report/request_exit) + meow_ui_media.c(懒连断线重连, meta上报+playctl接收) + MSG_NOTIF_OPEN=0x28/CLOSE=0x29(0x25/26已被占); SDK顶部下滑手势→IPC; launcher App前台会话叠加通知中心(SIGSTOP→读帧→接管输入→恢复SIGCONT, 面板内App崩溃即关); hello接线验证

meow_ui.a→9a8eb7ef; hello→fc299577; launcher→b33da20a; 宿主5套件+新test_notif_open+qemu分发 全过
出入: SDK符号用meow_ui_前缀防与launcher内同名冲突; 叠加会话真机待验; §10.5文档旧号段已过时

patch_v2/sdk/meow_notify_ipc.c

@@ -280,3 +280,55 @@ void meow_notify_ipc_update_progress(uint32_t nid, int progress)
     }
     close(fd);
 }
+
+/* ---- 通用一次性帧（meow_ui_nav / notif_open 复用本传输层） ---- */
+int meow_notify_ipc_send_raw(uint16_t type, const void *payload, uint32_t len, int want_ack)
+{
+    int fd = conn_path(ipc_sock_path());
+    if (fd < 0) return -1;
+    set_ack_timeout(fd);
+    if (!send_frame(fd, type, 0, payload, len)) { close(fd); return -1; }
+    if (want_ack) {
+        /* 阻塞读一帧应答头（best-effort：读到即确认 launcher 已处理；内容不关心）。
+         * 超时（SO_RCVTIMEO）/断开 → read_all 返回 0，视为已发出（不崩）。 */
+        uint8_t rhdr[MEOW_IPC_HDR_LEN];
+        if (read_all(fd, rhdr, sizeof rhdr)) {
+            /* 读完应答负载（若声明），保持连接语义一致；不校验 magic（best-effort） */
+            uint32_t rlen;
+            memcpy(&rlen, rhdr + 12, 4);
+            if (rlen > 0 && rlen <= MEOW_IPC_MAX) {
+                uint8_t pay[256];
+                size_t to = rlen < sizeof pay ? rlen : sizeof pay;
+                (void)read_all(fd, pay, to);
+            }
+        }
+    }
+    close(fd);
+    return 0;
+}
+
+void meow_notify_ipc_notif_open(const char *app_id, uint32_t event_seq,
+                                uint16_t origin_x, uint16_t origin_y,
+                                uint16_t hotzone, uint8_t flags)
+{
+    m_notif_open_t o;
+    memset(&o, 0, sizeof o);
+    snprintf(o.app_id, sizeof o.app_id, "%s",
+             (app_id && app_id[0]) ? app_id : meow_notify_ipc_app_id());
+    o.event_seq = event_seq;
+    o.origin_x  = origin_x;
+    o.origin_y  = origin_y;
+    o.hotzone   = hotzone;
+    o.flags     = flags;
+    (void)meow_notify_ipc_send_raw(MSG_NOTIF_OPEN, &o, (uint32_t)sizeof o, 1);
+}
+
+void meow_notify_ipc_notif_close(const char *app_id, uint32_t reason)
+{
+    m_notif_close_t o;
+    memset(&o, 0, sizeof o);
+    snprintf(o.app_id, sizeof o.app_id, "%s",
+             (app_id && app_id[0]) ? app_id : meow_notify_ipc_app_id());
+    o.reason = reason;
+    (void)meow_notify_ipc_send_raw(MSG_NOTIF_CLOSE, &o, (uint32_t)sizeof o, 1);
+}