Fix hw---gdk simulator crash: add readP0Adc simulator fallback

libs/hw---gdk/analog.ts

@@ -0,0 +1,15 @@
+namespace gdk {
+    /**
+     * Blocking single-shot ADC read of P0 (P0.02 / AIN0). Returns 0..1023 (same
+     * scale as pins.analogReadPin), or -1 on hardware timeout.
+     *
+     * On micro:bit V2 the native SAADC implementation in analog.cpp is used.
+     * The body below is the simulator fallback: there is no SAADC in the
+     * simulator, so it reports a full battery (1023) to keep the battery
+     * monitor and any game running without a runtime error.
+     */
+    //% shim=gdk::readP0Adc
+    export function readP0Adc(): number {
+        return 1023;
+    }
+}

libs/hw---gdk/pxt.json

@@ -4,9 +4,9 @@
     "files": [
         "config.ts",
         "init.ts",
+        "analog.ts",
         "batteryled.ts",
         "device.d.ts",
-        "shims.d.ts",
         "analog.cpp"
     ],
     "card": {