fixes that made it work

components/user_app/user_app.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Initialize hardware peripherals (I2C, sensors, ADC, buttons, codec, alerts).
+ * Called early in boot, before UI.
+ */
+void UserApp_AppInit(void);
+
+/**
+ * Create the dashboard UI. Must be called with LVGL lock held.
+ */
+void UserApp_UiInit(void);
+
+/**
+ * Start background tasks (WS client, sensor polling, button handling).
+ * Called after UI is created.
+ */
+void UserApp_TaskInit(void);
+
+#ifdef __cplusplus
+}
+#endif