perf: Skip constructing unnecessary std::string (#932)

## Summary

**What is the goal of this PR?**

Skip constructing a `std::string` just to get the underlying `c_str()`
buffer, when a string literal gives the same end result.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**NO**_

docs/i18n.md

@@ -2,8 +2,16 @@
 
 This guide explains the multi-language support system in CrossPoint Reader.
 
-## Supported Languages (Updating)
+## Supported Languages
 
+- English
+- French
+- German
+- Portuguese
+- Spanish
+- Swedish
+- Czech
+- Russian
 
 ---
 

lib/Epub/Epub/blocks/TextBlock.cpp

@@ -33,7 +33,7 @@ void TextBlock::render(const GfxRenderer& renderer, const int fontId, const int
       if (w.size() >= 3 && static_cast<uint8_t>(w[0]) == 0xE2 && static_cast<uint8_t>(w[1]) == 0x80 &&
           static_cast<uint8_t>(w[2]) == 0x83) {
         const char* visiblePtr = w.c_str() + 3;
-        const int prefixWidth = renderer.getTextAdvanceX(fontId, std::string("\xe2\x80\x83").c_str());
+        const int prefixWidth = renderer.getTextAdvanceX(fontId, "\xe2\x80\x83");
         const int visibleWidth = renderer.getTextWidth(fontId, visiblePtr, currentStyle);
         startX = wordX + prefixWidth;
         underlineWidth = visibleWidth;

lib/I18n/translations/russian.yaml

@@ -109,7 +109,7 @@ STR_COLOR_MODE: "Цветовой режим"
 STR_SCREEN_MARGIN: "Поля экрана"
 STR_PARA_ALIGNMENT: "Выравнивание абзаца"
 STR_HYPHENATION: "Перенос слов"
-STR_TIME_TO_SLEEP: "Сон Через"
+STR_TIME_TO_SLEEP: "Сон через"
 STR_REFRESH_FREQ: "Частота обновления"
 STR_CALIBRE_SETTINGS: "Настройки Calibre"
 STR_KOREADER_SYNC: "Синхронизация KOReader"
@@ -164,9 +164,9 @@ STR_PORTRAIT: "Портрет"
 STR_LANDSCAPE_CW: "Ландшафт (CW)"
 STR_INVERTED: "Инверсия"
 STR_LANDSCAPE_CCW: "Ландшафт (CCW)"
-STR_FRONT_LAYOUT_BCLR: "Наз"
-STR_FRONT_LAYOUT_LRBC: "Лев"
-STR_FRONT_LAYOUT_LBCR: "Лев"
+STR_FRONT_LAYOUT_BCLR: "Наз, Ок, Лев, Прав"
+STR_FRONT_LAYOUT_LRBC: "Лев, Прав, Наз, Ок"
+STR_FRONT_LAYOUT_LBCR: "Лев, Наз, Ок, Прав"
 STR_PREV_NEXT: "Назад/Вперёд"
 STR_NEXT_PREV: "Вперёд/Назад"
 STR_BOOKERLY: "Bookerly"
@@ -203,7 +203,7 @@ STR_NO_UPDATE: "Обновлений нет"
 STR_UPDATE_FAILED: "Ошибка обновления"
 STR_UPDATE_COMPLETE: "Обновление завершено"
 STR_POWER_ON_HINT: "Удерживайте кнопку питания для включения"
-STR_EXTERNAL_FONT: "Внешний шрифт"
+STR_EXTERNAL_FONT: "Пользовательский шрифт"
 STR_BUILTIN_DISABLED: "Встроенный (отключён)"
 STR_NO_ENTRIES: "Записи не найдены"
 STR_DOWNLOADING: "Загрузка..."
@@ -246,7 +246,7 @@ STR_CAPS_ON: "CAPS"
 STR_CAPS_OFF: "caps"
 STR_OK_BUTTON: "OK"
 STR_ON_MARKER: "[ВКЛ]"
-STR_SLEEP_COVER_FILTER: "Фильтр обложки сна"
+STR_SLEEP_COVER_FILTER: "Фильтр экрана сна"
 STR_FILTER_CONTRAST: "Контраст"
 STR_STATUS_BAR_FULL_PERCENT: "Полная + %"
 STR_STATUS_BAR_FULL_BOOK: "Полная + шкала книги"