add language info

app.py

@@ -6,12 +6,15 @@ from PySide6.QtWidgets import QApplication
 
 import build_info
 from audio.system_volume import set_volume
+from themes import THEME_DAY, THEME_NIGHT
+from ui.language_dialog import LanguageDialog
 from ui.main_window_new import MainWindowNew
 
 
 def run_app():
     app = QApplication(sys.argv)
     _apply_reset_if_requested()
+    _ensure_language_selected(app)
     _apply_startup_sound_defaults()
     _apply_startup_display_defaults()
     window = MainWindowNew(app)
@@ -61,3 +64,14 @@ def _apply_reset_if_requested():
     if settings_path.exists():
         settings_path.unlink()
     reset_marker.unlink()
+
+
+def _ensure_language_selected(app: QApplication):
+    settings = QSettings("car_ui", "ui")
+    if settings.contains("ui/language"):
+        return
+    theme_key = settings.value("display/theme", "night")
+    app.setStyleSheet(THEME_NIGHT if theme_key != "day" else THEME_DAY)
+    dialog = LanguageDialog()
+    if dialog.exec() == LanguageDialog.Accepted:
+        settings.setValue("ui/language", dialog.selected_language())

themes/day.py

@@ -167,4 +167,27 @@ QMenu::item:selected { background: #F3F4F6; }
     font-size: 14px;
     font-weight: 600;
 }
+
+#LanguageDialog { background: #F4F6F8; }
+#LanguageCard {
+    background: #FFFFFF;
+    border-radius: 16px;
+    border: 1px solid #E5E7EB;
+}
+#LanguageTitle { color: #111827; }
+#LanguageOption {
+    background: #FFFFFF;
+    color: #111827;
+    border-radius: 12px;
+    border: 1px solid #E5E7EB;
+    padding: 8px 14px;
+}
+#LanguageOption:checked { background: #E5E7EB; }
+#LanguageConfirm {
+    background: #111827;
+    color: #FFFFFF;
+    border-radius: 12px;
+    padding: 10px 16px;
+}
+#LanguageConfirm:hover { background: #0B1220; }
 """

themes/night.py

@@ -154,4 +154,26 @@ QMenu::item:selected { background: #1B2330; }
     font-size: 14px;
     font-weight: 600;
 }
+
+#LanguageDialog { background: #0B0E11; }
+#LanguageCard {
+    background: #141A22;
+    border-radius: 16px;
+}
+#LanguageTitle { color: #E6EAF0; }
+#LanguageOption {
+    background: #141A22;
+    color: #E6EAF0;
+    border-radius: 12px;
+    border: 1px solid #1B2330;
+    padding: 8px 14px;
+}
+#LanguageOption:checked { background: #2A3A52; }
+#LanguageConfirm {
+    background: #2A3A52;
+    color: #E6EAF0;
+    border-radius: 12px;
+    padding: 10px 16px;
+}
+#LanguageConfirm:hover { background: #344968; }
 """

ui/language_dialog.py

@@ -0,0 +1,77 @@
+from PySide6.QtCore import Qt, QSize
+from PySide6.QtGui import QFont
+from PySide6.QtWidgets import (
+    QDialog,
+    QWidget,
+    QLabel,
+    QVBoxLayout,
+    QHBoxLayout,
+    QPushButton,
+    QButtonGroup,
+    QSpacerItem,
+    QSizePolicy,
+)
+
+
+class LanguageDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+        self.setObjectName("LanguageDialog")
+        self.setWindowFlags(Qt.FramelessWindowHint | Qt.Dialog)
+        self.setWindowModality(Qt.ApplicationModal)
+        self.setMinimumSize(QSize(1024, 600))
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(24, 24, 24, 24)
+        root.setSpacing(16)
+
+        root.addItem(QSpacerItem(10, 10, QSizePolicy.Minimum, QSizePolicy.Expanding))
+
+        card = QWidget()
+        card.setObjectName("LanguageCard")
+        card_layout = QVBoxLayout(card)
+        card_layout.setContentsMargins(18, 18, 18, 18)
+        card_layout.setSpacing(14)
+
+        title = QLabel("Сначала выберите язык")
+        title.setObjectName("LanguageTitle")
+        title.setFont(QFont("", 20, 700))
+        title.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
+
+        options_row = QHBoxLayout()
+        options_row.setContentsMargins(0, 0, 0, 0)
+        options_row.setSpacing(12)
+
+        self._group = QButtonGroup(self)
+        self._group.setExclusive(True)
+
+        self._btn_ru = QPushButton("Русский")
+        self._btn_ru.setObjectName("LanguageOption")
+        self._btn_ru.setCheckable(True)
+        self._btn_ru.setChecked(True)
+        self._btn_ru.setMinimumHeight(48)
+        self._btn_ru.setFont(QFont("", 14, 600))
+        self._group.addButton(self._btn_ru)
+
+        options_row.addWidget(self._btn_ru, 1)
+        options_row.addStretch(1)
+
+        confirm = QPushButton("Продолжить")
+        confirm.setObjectName("LanguageConfirm")
+        confirm.setMinimumHeight(52)
+        confirm.setFont(QFont("", 15, 700))
+        confirm.clicked.connect(self.accept)
+
+        card_layout.addWidget(title)
+        card_layout.addLayout(options_row)
+        card_layout.addWidget(confirm)
+
+        root.addWidget(card)
+        root.addItem(QSpacerItem(10, 10, QSizePolicy.Minimum, QSizePolicy.Expanding))
+
+    def reject(self):
+        # Ignore reject to force a language choice.
+        return
+
+    def selected_language(self) -> str:
+        return "ru"