Revert some theme stuff

apple/OmnivoreKit/Sources/App/Views/WebReader/WebReaderContainer.swift

@@ -240,8 +240,7 @@ struct WebReaderContainerView: View {
     }
     .frame(height: readerViewNavBarHeight * navBarVisibilityRatio)
     .opacity(navBarVisibilityRatio)
-    .background(Color.black)
-    .background(Theme.fromName(themeName: ThemeManager.currentThemeName)?.bgColor ?? .clear)
+    .background(Color.systemBackground)
     .alert("Are you sure?", isPresented: $showDeleteConfirmation) {
       Button("Remove Link", role: .destructive) {
         Snackbar.show(message: "Link removed")
@@ -303,7 +302,6 @@ struct WebReaderContainerView: View {
           showBottomBar: $showBottomBar,
           showHighlightAnnotationModal: $showHighlightAnnotationModal
         )
-        .background(Theme.fromName(themeName: ThemeManager.currentThemeName)?.bgColor ?? .clear)
         .onTapGesture {
           withAnimation {
             navBarVisibilityRatio = 1

apple/OmnivoreKit/Sources/App/Views/WebReader/WebReaderContent.swift

@@ -16,7 +16,7 @@ struct WebReaderContent {
   init(
     item: LinkedItem,
     articleContent: ArticleContent,
-    isDark _: Bool,
+    isDark: Bool,
     fontSize: Int,
     lineHeight: Int,
     maxWidthPercentage: Int,
@@ -27,7 +27,7 @@ struct WebReaderContent {
     self.lineHeight = lineHeight
     self.maxWidthPercentage = maxWidthPercentage
     self.item = item
-    self.themeKey = ThemeManager.currentThemeName // isDark ? "Gray" : "Charcoal"
+    self.themeKey = isDark ? "Gray" : "LightGray"
     self.fontFamily = fontFamily
     self.articleContent = articleContent
     self.prefersHighContrastText = prefersHighContrastText

apple/OmnivoreKit/Sources/App/Views/WebReader/WebReaderCoordinator.swift

@@ -74,7 +74,7 @@ extension WebReaderCoordinator: WKNavigationDelegate {
   func webView(_ webView: WKWebView, didFinish _: WKNavigation!) {
     #if os(iOS)
       webView.isOpaque = true
-      webView.backgroundColor = .clear
+      webView.backgroundColor = .systemBackground
     #endif
   }