fix(fmt): use clang-format-18 to match CI expectations

Author: Jan VL

examples/tck_host_application.hpp

@@ -68,8 +68,8 @@ class TCKHostApplication {
   void run_multiple_broker_test(const std::vector<std::string>& params);
 
   // Helper to establish session without publishing test results
-  [[nodiscard]] auto establish_session(const std::string& host_id)
-      -> stdx::expected<void, std::string>;
+  [[nodiscard]] auto
+  establish_session(const std::string& host_id) -> stdx::expected<void, std::string>;
 
   // Utility functions for TCK communication
   void log(const std::string& level, const std::string& message);

scripts/format.sh

@@ -3,11 +3,16 @@
 
 set -e
 
-# Detect clang-format binary
-if command -v /opt/homebrew/bin/clang-format &> /dev/null; then
-    CLANG_FORMAT=/opt/homebrew/bin/clang-format
+# Detect clang-format binary (prefer clang-format-18 to match CI)
+if [ -n "$CLANG_FORMAT" ]; then
+    # Use environment variable if set
+    :
 elif command -v clang-format-18 &> /dev/null; then
     CLANG_FORMAT=clang-format-18
+elif [ -f /opt/homebrew/opt/llvm@18/bin/clang-format ]; then
+    CLANG_FORMAT=/opt/homebrew/opt/llvm@18/bin/clang-format
+elif command -v /opt/homebrew/bin/clang-format &> /dev/null; then
+    CLANG_FORMAT=/opt/homebrew/bin/clang-format
 elif command -v clang-format &> /dev/null; then
     CLANG_FORMAT=clang-format
 else