diff --git a/projects/APPLaunch/main/hal/sdl/hal_filesystem_sdl.cpp b/projects/APPLaunch/main/hal/sdl/hal_filesystem_sdl.cpp
index 943cbc1c..1232d540 100644
--- a/projects/APPLaunch/main/hal/sdl/hal_filesystem_sdl.cpp
+++ b/projects/APPLaunch/main/hal/sdl/hal_filesystem_sdl.cpp
@@ -1,4 +1,5 @@
 #include "../hal_filesystem.h"
+#include <stdio.h>   // snprintf
 #include <string.h>
 #include <stdlib.h>
 
diff --git a/projects/APPLaunch/main/hal/sdl/hal_settings_sdl.cpp b/projects/APPLaunch/main/hal/sdl/hal_settings_sdl.cpp
index 00a56b45..25ce75c0 100644
--- a/projects/APPLaunch/main/hal/sdl/hal_settings_sdl.cpp
+++ b/projects/APPLaunch/main/hal/sdl/hal_settings_sdl.cpp
@@ -53,6 +53,8 @@ int hal_wifi_connect(const char *ssid, const char *password)
     (void)ssid; (void)password; return 0;
 }
 
+int hal_wifi_disconnect(void) { return 0; }
+
 hal_bt_status_t hal_bt_get_status(void)
 {
     hal_bt_status_t st;
diff --git a/projects/APPLaunch/main/ui/components/page_app/ui_app_setup.hpp b/projects/APPLaunch/main/ui/components/page_app/ui_app_setup.hpp
index 5d3298bf..d665ac4c 100644
--- a/projects/APPLaunch/main/ui/components/page_app/ui_app_setup.hpp
+++ b/projects/APPLaunch/main/ui/components/page_app/ui_app_setup.hpp
@@ -1,5 +1,11 @@
 #pragma once
-#if !defined(HAL_PLATFORM_SDL)
+// Note: this file used to be wrapped in `#if !defined(HAL_PLATFORM_SDL)` to
+// exclude it from the emulator build, but ui_app_launch.cpp references
+// UISetupPage unconditionally. The class body is HAL-clean (uses hal_wifi_*,
+// hal_battery_*, hal_volume_*); residual raw syscalls (i2c ioctl, popen for
+// IP/whoami, sudo date) are either already inside #ifdef __linux__ or only
+// triggered by user actions that the emulator never performs. Keeping the
+// class compiled on every platform lets the emulator open the SETTING page.
 #define _STRINGIFY(x) #x
 #define STRINGIFY(x) _STRINGIFY(x)
 #ifndef LAUNCHER_GIT_COMMIT_RAW
@@ -1728,15 +1734,3 @@ class UISetupPage : public app_base
         }
     }
 };
-
-#else // HAL_PLATFORM_SDL — stub for emulator builds
-#include "../ui_app_page.hpp"
-
-class UISetupPage : public app_base
-{
-public:
-    UISetupPage() : app_base() { set_page_title("SETTING"); }
-    ~UISetupPage() {}
-};
-
-#endif // !HAL_PLATFORM_SDL