Fix PoC; comments; typos

Author: kkafar

ios/RNSScreen.mm

@@ -151,12 +151,19 @@ - (void)updateBounds
 #ifdef RCT_NEW_ARCH_ENABLED
   if (_state != nullptr) {
     RNSScreenStackHeaderConfig *config = [self findHeaderConfig];
-    // in large title, ScrollView handles the offset of content so we cannot set it here also.
-    CGFloat headerHeight =
-        config.largeTitle ? 0 : [_controller calculateHeaderHeightIsModal:self.isPresentedAsNativeModal];
-    auto newState =
-        react::RNSScreenState{RCTSizeFromCGSize(self.bounds.size), RCTPointFromCGPoint(CGPointMake(0, headerHeight))};
+
+    // in large title, ScrollView handles the offset of content so we cannot set it here also
+    // TODO: Why is it assumed in comment above, that large title uses scrollview here? What if only SafeAreView is
+    // used? When config.translucent, we currently use `edgesForExtendedLayout` and the screen is laid out under the
+    // navigation bar, therefore there is no need to set content offset in shadow tree.
+    const CGFloat effectiveContentOffsetY = config.largeTitle || config.translucent
+        ? 0
+        : [_controller calculateHeaderHeightIsModal:self.isPresentedAsNativeModal];
+
+    auto newState = react::RNSScreenState{RCTSizeFromCGSize(self.bounds.size), {0, effectiveContentOffsetY}};
     _state->updateState(std::move(newState));
+
+    // TODO: Requesting layout on every layout is wrong. We should look for a way to get rid of this.
     UINavigationController *navctr = _controller.navigationController;
     [navctr.view setNeedsLayout];
   }

ios/RNSScreenStackHeaderConfig.mm

@@ -603,7 +603,7 @@ + (void)updateViewController:(UIViewController *)vc
   BOOL shouldHide = config == nil || !config.shouldHeaderBeVisible;
 
   if (!shouldHide && !config.translucent) {
-    // when nav bar is not translucent we chage edgesForExtendedLayout to avoid system laying out
+    // when nav bar is not translucent we change edgesForExtendedLayout to avoid system laying out
     // the screen underneath navigation controllers
     vc.edgesForExtendedLayout = UIRectEdgeNone;
   } else {