fix Android: load shell.rml, add loadAppContent function, fallback to built-in apps

install-device.bat

@@ -0,0 +1,70 @@
+@echo off
+setlocal enabledelayedexpansion
+
+echo ========================================
+echo Mosis Device Installation Script
+echo ========================================
+echo.
+
+:: Package name
+set PACKAGE=com.omixlab.mosis
+set DEVICE_APPS_DIR=files/apps
+
+:: Step 1: Build and install APK
+echo [1/3] Building and installing debug APK...
+call gradlew installDebug
+if errorlevel 1 (
+    echo ERROR: Failed to install APK
+    exit /b 1
+)
+echo.
+
+:: Step 2: Push base-apps to temp location
+echo [2/3] Pushing base-apps to temp location...
+adb shell "rm -rf /data/local/tmp/mosis-apps" 2>nul
+adb push base-apps /data/local/tmp/mosis-apps
+if errorlevel 1 (
+    echo ERROR: Failed to push base-apps
+    exit /b 1
+)
+echo.
+
+:: Step 3: Copy to private data using run-as
+echo [3/3] Installing apps to internal storage...
+echo   Using run-as for /data/data/%PACKAGE%/%DEVICE_APPS_DIR%/
+echo.
+
+:: Create apps directory
+adb shell "run-as %PACKAGE% mkdir -p %DEVICE_APPS_DIR%"
+
+:: List of apps to install
+for /d %%A in (base-apps\com.mosis.*) do (
+    set APP_ID=%%~nxA
+    echo   Installing !APP_ID!...
+
+    :: Create app directory structure
+    adb shell "run-as %PACKAGE% mkdir -p %DEVICE_APPS_DIR%/!APP_ID!"
+
+    :: Copy files using tar through run-as (faster than individual files)
+    adb shell "cd /data/local/tmp/mosis-apps/!APP_ID! && tar cf - . | run-as %PACKAGE% tar xf - -C %DEVICE_APPS_DIR%/!APP_ID!/"
+)
+
+:: Cleanup temp files
+echo.
+echo Cleaning up temp files...
+adb shell "rm -rf /data/local/tmp/mosis-apps"
+
+echo.
+echo ========================================
+echo Installation complete!
+echo ========================================
+echo.
+echo APK: %PACKAGE%
+echo Apps: /data/data/%PACKAGE%/%DEVICE_APPS_DIR%/
+echo.
+echo Verify with:
+echo   adb shell "run-as %PACKAGE% ls -la %DEVICE_APPS_DIR%"
+echo.
+echo Launch with:
+echo   adb shell am start -n %PACKAGE%/.MainActivity
+echo.