Apply clang-format across the whole tree

Run clang-format (the repo's .clang-format: LLVM base, 120 cols, tabs,
Allman functions) over every source file so the tree is formatter-clean.
Whitespace only -- no behavior change; full x64 + x86 suites pass.

Also set SortIncludes: false in .clang-format. Windows include order is
load-bearing (windows.h must precede tlhelp32.h / mmreg.h / xinput.h /
dinput.h; winsock2.h must precede windows.h), and the default
alphabetical sort reorders tlhelp32.h ahead of windows.h -- a build
break. Leaving order alone keeps the manual, correct grouping.

host/src/imgui_layer.cpp

@@ -11,13 +11,11 @@
 #include "ui/app_chrome.hpp"
 #include "util/utf8.hpp"
 
-namespace coop
-{
+namespace coop {
 
 ImGuiLayer::~ImGuiLayer()
 {
-	if (initialized_)
-	{
+	if (initialized_) {
 		ImGui_ImplDX11_Shutdown();
 		ImGui_ImplWin32_Shutdown();
 		ImGui::DestroyContext();
@@ -42,12 +40,10 @@ bool ImGuiLayer::init(HWND hwnd, ID3D11Device* device, ID3D11DeviceContext* cont
 	io.IniFilename = ini_path_.c_str();
 	set_layout_persisted(had_layout);
 
-	if (!ImGui_ImplWin32_Init(hwnd))
-	{
+	if (!ImGui_ImplWin32_Init(hwnd)) {
 		return false;
 	}
-	if (!ImGui_ImplDX11_Init(device, context))
-	{
+	if (!ImGui_ImplDX11_Init(device, context)) {
 		return false;
 	}
 	initialized_ = true;
@@ -78,8 +74,7 @@ void ImGuiLayer::apply_dpi(unsigned dpi)
 
 	// Drop the DX11 backend's cached font texture so it rebuilds from the new atlas next frame. Before
 	// the first frame nothing is built yet, so this is a harmless no-op during init().
-	if (initialized_)
-	{
+	if (initialized_) {
 		ImGui_ImplDX11_InvalidateDeviceObjects();
 	}
 	dpi_scale_ = scale;
@@ -87,8 +82,7 @@ void ImGuiLayer::apply_dpi(unsigned dpi)
 
 void ImGuiLayer::set_dpi(unsigned dpi)
 {
-	if (!initialized_ || dpi_scale_from(dpi) == dpi_scale_)
-	{
+	if (!initialized_ || dpi_scale_from(dpi) == dpi_scale_) {
 		return; // not up yet, or the scale didn't actually change -- skip a needless atlas rebuild
 	}
 	apply_dpi(dpi);