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/fix-capacitor-build.sh

@@ -50,7 +50,14 @@ if [ -f "$CAPACITOR_BUILD_GRADLE" ]; then
         echo "   Solution: Commenting out the problematic 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\/\/ &/' "$CAPACITOR_BUILD_GRADLE"
+        # Handle macOS vs Linux sed differences
+        if [[ "$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\/\/ &/' "$CAPACITOR_BUILD_GRADLE"
+        else
+            # Linux sed
+            sed -i 's/^apply from: "\.\.\/capacitor-cordova-android-plugins\/cordova\.variables\.gradle"/\/\/ Plugin development project - no Capacitor integration files needed\n\/\/ &/' "$CAPACITOR_BUILD_GRADLE"
+        fi
         
         echo "✅ Fix applied successfully!"
         echo "💡 The problematic line has been commented out with an explanation"