Fix: invalid clean command

scripts/build-ios.sh

@@ -186,8 +186,8 @@ clean_ios_build() {
         log_debug "Cleaned ios/App/DerivedData/"
     fi
     
-    # Clean Capacitor
-    npx cap clean ios || true
+    # Clean Capacitor (using npm script instead of invalid cap clean command)
+    npm run clean:ios || true
     
     log_success "iOS build cleaned"
 }