Add option to hide time and battery info.

lib/foundation/appdata.dart

@@ -118,6 +118,7 @@ class _Settings with ChangeNotifier {
     'dataVersion': 0,
     'quickFavorite': null,
     'enableTurnPageByVolumeKey': true,
+    'enableClockAndBatteryInfoInReader': true,
   };
 
   operator [](String key) {

lib/pages/reader/scaffold.dart

@@ -426,17 +426,21 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
   }
 
   Widget buildStatusInfo() {
-    return Positioned(
-      bottom: 13,
-      right: 25,
-      child: Row(
-        children: [
-          _ClockWidget(),
-          const SizedBox(width: 10),
-          _BatteryWidget(),
-        ],
-      ),
-    );
+    if(appdata.settings['enableClockAndBatteryInfoInReader']) {
+      return Positioned(
+        bottom: 13,
+        right: 25,
+        child: Row(
+          children: [
+            _ClockWidget(),
+            const SizedBox(width: 10),
+            _BatteryWidget(),
+          ],
+        ),
+      );
+    } else {
+      return const SizedBox.shrink();
+    }
   }
 
   void openChapterDrawer() {

lib/pages/settings/reader.dart

@@ -77,6 +77,13 @@ class _ReaderSettingsState extends State<ReaderSettings> {
               widget.onChanged?.call('enableTurnPageByVolumeKey');
             },
           ).toSliver(),
+        _SwitchSetting(
+          title: "Display time & battery info in reader".tl,
+          settingKey: "enableClockAndBatteryInfoInReader",
+          onChanged: () {
+            widget.onChanged?.call("enableClockAndBatteryInfoInReader");
+          },
+        ).toSliver(),
       ],
     );
   }