fix: apply clang-format and exclude third-party libraries from formatting checks

- Applied clang-format to fix formatting violations in TUI and other source files
- Updated CMakeLists.txt to exclude src/lib/* from format targets to prevent third-party library violations
- Fixes clang-format violations in chat_tui.cc, tui.cc, and unified_layout.cc
- All source files now pass format-check target

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

test/test_utils.h

@@ -5,15 +5,15 @@
 #define IMGUI_DEFINE_MATH_OPERATORS
 #endif
 
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
 #include <filesystem>
 #include <fstream>
 #include <iostream>
 #include <string>
 #include <vector>
 
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-
 #include "absl/strings/str_format.h"
 #include "app/rom.h"
 #include "imgui_test_engine/imgui_te_context.h"