Updated dev-init scripts to check for sample project presence

dev-init/dev-init-android.sh

@@ -38,8 +38,12 @@ $SDKMANAGER --install "emulator"
 mkdir -p ~/Library/Android/ ||:
 ln -sf /opt/android-sdk/ ~/Library/Android/sdk ||:
 
-# Build demo project
-"$ANDROID_SAMPLE_PROJECT/build.sh"
+# Build demo project if present
+if [ -d "$ANDROID_SAMPLE_PROJECT" ]; then
+    "$ANDROID_SAMPLE_PROJECT/build.sh"
+else
+    echo "Android demo project not found at $ANDROID_SAMPLE_PROJECT"
+fi
 
 flutter config --android-sdk $ANDROID_SDK_ROOT
 flutter emulators --create

dev-init/dev-init-flutter.sh

@@ -32,7 +32,11 @@ flutter precache --linux --web
 flutter doctor
 flutter --version
 
-# Build demo project
-"$FLUTTER_SAMPLE_PROJECT/build.sh"
+# Build demo project if present
+if [ -d "$FLUTTER_SAMPLE_PROJECT" ]; then
+    "$FLUTTER_SAMPLE_PROJECT/build.sh"
+else
+    echo "Sample project not found at $FLUTTER_SAMPLE_PROJECT"
+fi
 
 echo "Flutter development environment setup completed successfully!"

dev-init/dev-init-rust.sh

@@ -24,7 +24,11 @@ cargo install wasm-pack
 dart pub global activate fvm
 dart --disable-analytics
 
-# Build demo project
-"$RUST_SAMPLE_PROJECT/build.sh"
+# Build demo project if present
+if [ -d "$RUST_SAMPLE_PROJECT" ]; then
+    "$RUST_SAMPLE_PROJECT/build.sh"
+else
+    echo "No sample project found in $RUST_SAMPLE_PROJECT"
+fi
 
 echo "Rust development environment setup completed successfully!"