Added keyboard shortcut help.

tests/test_review_regressions.py

@@ -9,7 +9,7 @@ from unittest.mock import Mock
 import pytest
 from PySide6.QtCore import Qt
 from PySide6.QtMultimedia import QMediaPlayer
-from PySide6.QtWidgets import QApplication, QWidget, QTreeWidgetItem
+from PySide6.QtWidgets import QApplication, QDialog, QTableWidget, QTreeWidgetItem, QWidget
 
 from src.api.client import SubsonicClient
 from src.api.models import Song, Playlist
@@ -49,6 +49,24 @@ def test_background_error_survives_until_ui_delivery(app):
     assert str(errors[0]) == "synthetic failure"
 
 
+def test_keyboard_shortcuts_dialog_has_accessible_shortcut_table(app, monkeypatch):
+    parent = QWidget()
+
+    def inspect_dialog(dialog):
+        table = dialog.findChild(QTableWidget)
+        assert dialog.windowTitle() == "Keyboard Shortcuts"
+        assert table.accessibleName() == "Keyboard shortcuts"
+        assert table.horizontalHeaderItem(0).text() == "Shortcut"
+        assert table.horizontalHeaderItem(1).text() == "Action"
+        assert table.rowCount() >= 20
+        assert table.item(15, 0).text() == "Ctrl+Down or 9"
+        assert table.item(15, 1).text() == "Decrease volume"
+        return QDialog.Accepted
+
+    monkeypatch.setattr(QDialog, "exec", inspect_dialog)
+    MainWindow.showKeyboardShortcuts(parent)
+
+
 @pytest.mark.parametrize("refresh", ["forced", "full", "incremental"])
 def test_refresh_bypasses_api_memory_cache(tmp_path, refresh):
     raw = SubsonicClient("https://fake.example", "user", "fake")