fix: use robust loop for idempotent header patching to avoid find -exec syntax errors

scripts/setup.sh

@@ -269,11 +269,13 @@ find src -type f \( -name "*.h" -o -name "*.cpp" \) -exec sed -i 's/std::std::/s
 find src -type f \( -name "*.h" -o -name "*.cpp" \) -exec sed -i 's/\([^:a-zA-Z0-9]\)unique_ptr\b/\1std::unique_ptr/g' {} +
 find src -type f \( -name "*.h" -o -name "*.cpp" \) -exec sed -i 's/\([^:a-zA-Z0-9]\)make_unique\b/\1std::make_unique/g' {} +
 
-# Add memory header only if not present
-find src -type f -name "*.h" -exec grep -q "<memory>" {} || sed -i '1i #include <memory>' {} +
-
-# 3. Fix missing algorithms (std::find, etc)
-find src -type f -name "*.cpp" -exec grep -q "<algorithm>" {} || sed -i '1i #include <algorithm>' {} +
+# Add headers only if not present
+for f in $(find src -type f -name "*.h"); do
+  grep -q "<memory>" "$f" || sed -i '1i #include <memory>' "$f"
+done
+for f in $(find src -type f -name "*.cpp"); do
+  grep -q "<algorithm>" "$f" || sed -i '1i #include <algorithm>' "$f"
+done
 
 # Build Example (Force C++17 for better compatibility with this addon)
 cd "$REAL_HOME/openFrameworks/addons/ofxPiMapper/example_basic"