fix(ci): improve version extraction script for GitHub Actions compatibility

- Replace bash [[ ]] regex test with grep -Eq for better portability

- Add debug output showing pwd and directory listing on file not found

- Use explicit regex groups for + and - separately for better compatibility

.github/scripts/extract-version.sh

@@ -24,6 +24,9 @@ fi
 # Check if pubspec exists
 if [ ! -f "$PUBSPEC_PATH" ]; then
   echo "❌ Error: pubspec.yaml not found at $PUBSPEC_PATH" >&2
+  echo "📁 Current directory: $(pwd)" >&2
+  echo "📂 Directory contents:" >&2
+  ls -la apps/mobile/apps/ 2>&1 | head -20 >&2
   exit 1
 fi
 
@@ -38,7 +41,8 @@ fi
 VERSION=$(echo "$VERSION_LINE" | sed 's/version: *//' | tr -d ' ')
 
 # Validate version format (X.Y.Z with optional +build or -suffix)
-if ! [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+([-+][a-zA-Z0-9]+)?$ ]]; then
+# Use grep for better portability across different bash versions
+if ! echo "$VERSION" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+(\+[a-zA-Z0-9]+|-[a-zA-Z0-9]+)?$'; then
   echo "❌ Error: Invalid version format in pubspec.yaml: $VERSION" >&2
   echo "Expected format: X.Y.Z, X.Y.Z+build, or X.Y.Z-suffix (e.g., 0.1.0, 0.1.0+12, 0.1.0-m3)" >&2
   exit 1