fix(mobile): read display scale and width from the view's scene, not UIScreen.main

apps/mobile/modules/t3-composer-editor/ios/T3ComposerEditorView.swift

@@ -436,6 +436,7 @@ public final class T3ComposerEditorView: ExpoView, UITextViewDelegate, UITextDro
   private var iconImages: [String: UIImage] = [:]
   private var pendingIconUris = Set<String>()
   private var tokensNeedRebuild = false
+  private var chipsNeedMeasuredWidth = false
 
   let onComposerChange = EventDispatcher()
   let onComposerSelectionChange = EventDispatcher()
@@ -571,6 +572,10 @@ public final class T3ComposerEditorView: ExpoView, UITextViewDelegate, UITextDro
   public override func layoutSubviews() {
     super.layoutSubviews()
     textView.frame = bounds
+    if chipsNeedMeasuredWidth, bounds.width > 0 {
+      chipsNeedMeasuredWidth = false
+      applyControlledDocument(force: true)
+    }
     let placeholderX = textView.textContainerInset.left + textView.textContainer.lineFragmentPadding
     let placeholderY = textView.textContainerInset.top
     let placeholderWidth = max(
@@ -970,7 +975,10 @@ public final class T3ComposerEditorView: ExpoView, UITextViewDelegate, UITextDro
     // `maximumWidth` does, so the chip always fits the line it sits on.
     let availableWidth = textView.textContainer.size.width > 0
       ? textView.textContainer.size.width - textView.textContainer.lineFragmentPadding * 2
-      : UIScreen.main.bounds.width
+      : (textView.window?.bounds.width ?? bounds.width)
+    if availableWidth <= 0 {
+      chipsNeedMeasuredWidth = true
+    }
     let maximumLabelWidth = max(chipFontSize * 3, availableWidth - padding * 2 - iconWidth - iconGap)
     paragraph.lineBreakMode = .byTruncatingMiddle
     attributedLabel.addAttribute(

apps/mobile/modules/t3-review-diff/ios/T3ReviewDiffView.swift

@@ -1923,7 +1923,7 @@ private final class ReviewDiffContentView: UIView, UIGestureRecognizerDelegate {
     theme.headerBackground.setFill()
     context.fill(cardRect)
 
-    let hairline = 1 / UIScreen.main.scale
+    let hairline = 1 / traitCollection.displayScale
     theme.border.setFill()
     context.fill(CGRect(x: cardRect.minX, y: cardRect.maxY - hairline, width: cardRect.width, height: hairline))
 
@@ -1982,7 +1982,7 @@ private final class ReviewDiffContentView: UIView, UIGestureRecognizerDelegate {
     theme.background.setFill()
     context.fill(rect)
 
-    let hairline = 1 / UIScreen.main.scale
+    let hairline = 1 / traitCollection.displayScale
     theme.border.withAlphaComponent(0.65).setFill()
     context.fill(CGRect(x: 0, y: rect.maxY - hairline, width: rect.width, height: hairline))
 

apps/mobile/modules/t3-terminal/ios/T3TerminalView.swift

@@ -315,7 +315,8 @@ public final class T3TerminalView: ExpoView, UITextFieldDelegate {
 
     applyTheme()
     clipsToBounds = true
-    contentScaleFactor = UIScreen.main.scale
+    // The real scale arrives with the window; layoutSubviews corrects it.
+    contentScaleFactor = traitCollection.displayScale
 
     terminalViewport.clipsToBounds = true
     terminalViewport.contentScaleFactor = contentScaleFactor
@@ -677,7 +678,9 @@ public final class T3TerminalView: ExpoView, UITextFieldDelegate {
   }
 
   private func updateContentScale() {
-    let scale = window?.screen.scale ?? UIScreen.main.scale
+    // The trait collection follows the scene the view is in, which matters once
+    // iPhone apps run resizable and on external displays; UIScreen.main does not.
+    let scale = traitCollection.displayScale
     if contentScaleFactor != scale {
       contentScaleFactor = scale
     }