yuzu qt: Revert some usages of string_view

Causes a heap-use-after free reported by AddressSanitizer. This makes
use of std::filesystem::path, but due to that we have to use their
string() function which may not work for all characters.

src/yuzu/configuration/config.cpp

@@ -16,7 +16,7 @@
 
 namespace FS = Common::FS;
 
-Config::Config(std::string_view config_name, ConfigType config_type) : type(config_type) {
+Config::Config(const std::string& config_name, ConfigType config_type) : type(config_type) {
     global = config_type == ConfigType::GlobalConfig;
 
     Initialize(config_name);
@@ -242,7 +242,7 @@ const std::array<UISettings::Shortcut, 17> Config::default_hotkeys{{
 }};
 // clang-format on
 
-void Config::Initialize(std::string_view config_name) {
+void Config::Initialize(const std::string& config_name) {
     const auto fs_config_loc = FS::GetYuzuPath(FS::YuzuPath::ConfigDir);
     const auto config_file = fmt::format("{}.ini", config_name);
 
@@ -255,7 +255,8 @@ void Config::Initialize(std::string_view config_name) {
         Reload();
         break;
     case ConfigType::PerGameConfig:
-        qt_config_loc = FS::PathToUTF8String(fs_config_loc / "custom" / config_file);
+        qt_config_loc =
+            FS::PathToUTF8String(fs_config_loc / "custom" / FS::ToU8String(config_file));
         void(FS::CreateParentDir(qt_config_loc));
         qt_config = std::make_unique<QSettings>(QString::fromStdString(qt_config_loc),
                                                 QSettings::IniFormat);

src/yuzu/configuration/config.h

@@ -22,7 +22,7 @@ public:
         InputProfile,
     };
 
-    explicit Config(std::string_view config_name = "qt-config",
+    explicit Config(const std::string& config_name = "qt-config",
                     ConfigType config_type = ConfigType::GlobalConfig);
     ~Config();
 
@@ -45,7 +45,7 @@ public:
     static const std::array<UISettings::Shortcut, 17> default_hotkeys;
 
 private:
-    void Initialize(std::string_view config_name);
+    void Initialize(const std::string& config_name);
 
     void ReadValues();
     void ReadPlayerValue(std::size_t player_index);

src/yuzu/configuration/configure_per_game.cpp

@@ -3,10 +3,13 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
+#include <filesystem>
 #include <memory>
 #include <string>
 #include <utility>
 
+#include <fmt/format.h>
+
 #include <QAbstractButton>
 #include <QCheckBox>
 #include <QDialogButtonBox>
@@ -18,6 +21,7 @@
 #include <QTimer>
 #include <QTreeView>
 
+#include "common/fs/fs_util.h"
 #include "common/fs/path_util.h"
 #include "core/core.h"
 #include "core/file_sys/control_metadata.h"
@@ -31,10 +35,11 @@
 #include "yuzu/uisettings.h"
 #include "yuzu/util/util.h"
 
-ConfigurePerGame::ConfigurePerGame(QWidget* parent, u64 title_id, std::string_view file_name)
+ConfigurePerGame::ConfigurePerGame(QWidget* parent, u64 title_id, const std::string& file_name)
     : QDialog(parent), ui(std::make_unique<Ui::ConfigurePerGame>()), title_id(title_id) {
-    const auto config_file_name =
-        title_id == 0 ? Common::FS::GetFilename(file_name) : fmt::format("{:016X}", title_id);
+    const auto file_path = std::filesystem::path(Common::FS::ToU8String(file_name));
+    const auto config_file_name = title_id == 0 ? Common::FS::PathToUTF8String(file_path.filename())
+                                                : fmt::format("{:016X}", title_id);
     game_config = std::make_unique<Config>(config_file_name, Config::ConfigType::PerGameConfig);
 
     Settings::SetConfiguringGlobal(false);

src/yuzu/configuration/configure_per_game.h

@@ -28,7 +28,8 @@ class ConfigurePerGame : public QDialog {
     Q_OBJECT
 
 public:
-    explicit ConfigurePerGame(QWidget* parent, u64 title_id, std::string_view file_name);
+    // Cannot use std::filesystem::path due to https://bugreports.qt.io/browse/QTBUG-73263
+    explicit ConfigurePerGame(QWidget* parent, u64 title_id, const std::string& file_name);
     ~ConfigurePerGame() override;
 
     /// Save all button configurations to settings file