feat：查询菜单页面适配小键盘

lib/common/utils/app/app_setting_tool.dart

@@ -82,6 +82,11 @@ abstract class AppSettingTool {
   static const String _menuQueryShortcutKeyBindingsKey =
       "menuQueryShortcutKeyBindings";
 
+  /// 查询菜单快捷小键盘模式开关在现有 sysJson 中的稳定存储键；
+  /// 缺失时按开启处理（配合出厂默认键位开箱即用），仅明确保存 false 才关闭。
+  static const String _reservationQueryKeyboardModeEnabledKey =
+      "reservationQueryKeyboardModeEnabled";
+
   /// 早餐、中餐和晚餐的本地时间范围；值使用现有 ProductHourType 后端编码。
   static const String _productMealPeriodsKey = "productMealPeriods";
   static const String _serialCardConfigKey = "serialCardConfig";
@@ -634,9 +639,14 @@ abstract class AppSettingTool {
             )
             .firstOrNull ??
         ReservationMealSlot.morning;
-    final shortcutKeyBindings = _parseMenuQueryShortcutKeyBindings(
-      sysJson[_menuQueryShortcutKeyBindingsKey],
-    );
+    // 终端从未保存过快捷按键配置（全新安装或旧版本升级）时使用出厂默认字母按键；
+    // 键一旦存在就完全以用户配置为准，即使值为空对象（用户已主动清空全部绑定）。
+    final shortcutKeyBindings =
+        sysJson.containsKey(_menuQueryShortcutKeyBindingsKey)
+            ? _parseMenuQueryShortcutKeyBindings(
+                sysJson[_menuQueryShortcutKeyBindingsKey],
+              )
+            : MenuQueryShortcutKeyBinding.defaults;
     return ReservationQueryPagePreferences(
       methodOrder: List.unmodifiable(restored),
       defaultMethod: defaultMethod,
@@ -658,6 +668,9 @@ abstract class AppSettingTool {
       selectedMealSlot: selectedMealSlot,
       verificationDateScope: verificationDateScope,
       shortcutKeyBindings: shortcutKeyBindings,
+      // 键盘模式默认开启：仅操作员明确保存过关闭状态才保持关闭。
+      keyboardModeEnabled:
+          sysJson[_reservationQueryKeyboardModeEnabledKey] != false,
     );
   }
 
@@ -706,6 +719,7 @@ abstract class AppSettingTool {
     required ReservationVerificationDateScope verificationDateScope,
     required Map<MenuQueryShortcutAction, MenuQueryShortcutKeyBinding>
         shortcutKeyBindings,
+    required bool keyboardModeEnabled,
   }) {
     final normalized = <ReservationRecognitionMethod>[];
     for (final method in order) {
@@ -738,6 +752,7 @@ abstract class AppSettingTool {
           if (entry.value.usbHidUsage != 0 || entry.value.logicalKeyId != 0)
             entry.key.code: entry.value.toJson(),
       };
+      sysJson[_reservationQueryKeyboardModeEnabledKey] = keyboardModeEnabled;
     });
   }