Adapt status bar content color for reader theme

app/src/main/kotlin/com/google/accompanist/systemuicontroller/SystemUiController.kt

@@ -69,6 +69,11 @@ interface SystemUiController {
             isStatusBarVisible = value
             isNavigationBarVisible = value
         }
+
+    /**
+     * Property which holds whether the status bar icons + content are 'dark' or not.
+     */
+    var statusBarDarkContentEnabled: Boolean
 }
 
 /**
@@ -149,4 +154,10 @@ internal class AndroidSystemUiController(
                 windowInsetsController?.hide(WindowInsetsCompat.Type.navigationBars())
             }
         }
+
+    override var statusBarDarkContentEnabled: Boolean
+        get() = windowInsetsController?.isAppearanceLightStatusBars == true
+        set(value) {
+            windowInsetsController?.isAppearanceLightStatusBars = value
+        }
 }

app/src/main/kotlin/com/hippo/ehviewer/ui/reader/ReaderScreen.kt

@@ -105,6 +105,18 @@ fun AnimatedVisibilityScope.ReaderScreen(args: ReaderScreenArgs, navigator: Dest
         }
         val bgColor by collectBackgroundColorAsState()
         val readingFailed = stringResource(R.string.error_reading_failed)
+        val uiController = rememberSystemUiController()
+        DisposableEffect(uiController) {
+            val lightStatusBar = uiController.statusBarDarkContentEnabled
+            onDispose {
+                uiController.statusBarDarkContentEnabled = lightStatusBar
+            }
+        }
+        LaunchedEffect(uiController) {
+            snapshotFlow { bgColor }.collect {
+                uiController.statusBarDarkContentEnabled = it == Color.White
+            }
+        }
         Await(
             {
                 Either.catch {