fix(build): add macOS compatibility for sed commands in build scripts

- Fix sed -i syntax differences between macOS and Linux
- macOS requires empty string after -i flag: sed -i '' 'pattern' file
- Linux uses: sed -i 'pattern' file
- Add OSTYPE detection to handle both platforms correctly
- Fixes build script failures on macOS systems

Resolves: sed command a expects \ followed by text error on macOS

scripts/build-native.sh

@@ -120,7 +120,14 @@ build_android() {
                 log_info "   Fix: Commenting out problematic 'apply from' line"
                 
                 # Apply the fix by commenting out the problematic line
-                sed -i 's/^apply from: "\.\.\/capacitor-cordova-android-plugins\/cordova\.variables\.gradle"/\/\/ Plugin development project - no Capacitor integration files needed\n\/\/ &/' "app/capacitor.build.gradle"
+                # Handle macOS vs Linux sed differences
+                if [[ "$OSTYPE" == "darwin"* ]]; then
+                    # macOS sed requires empty string after -i
+                    sed -i '' 's/^apply from: "\.\.\/capacitor-cordova-android-plugins\/cordova\.variables\.gradle"/\/\/ Plugin development project - no Capacitor integration files needed\n\/\/ &/' "app/capacitor.build.gradle"
+                else
+                    # Linux sed
+                    sed -i 's/^apply from: "\.\.\/capacitor-cordova-android-plugins\/cordova\.variables\.gradle"/\/\/ Plugin development project - no Capacitor integration files needed\n\/\/ &/' "app/capacitor.build.gradle"
+                fi
                 
                 log_info "✅ Fix applied successfully"
                 log_warn "⚠️  Note: This fix will be lost if you run 'npx cap sync' or 'npx cap update'"