From 359ada8a3f2ff03babe51e906bf22834aeeb0098 Mon Sep 17 00:00:00 2001
From: Lawrence Chen <54008264+lawrencecchen@users.noreply.github.com>
Date: Tue, 10 Mar 2026 20:42:26 -0700
Subject: [PATCH] Preserve side-docked browser devtools layout on pane resize

---
 Sources/BrowserWindowPortal.swift     | 6 +++---
 Sources/Panels/BrowserPanelView.swift | 7 +++----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/Sources/BrowserWindowPortal.swift b/Sources/BrowserWindowPortal.swift
index 40007065..42e6c3c0 100644
--- a/Sources/BrowserWindowPortal.swift
+++ b/Sources/BrowserWindowPortal.swift
@@ -1676,8 +1676,7 @@ final class WindowBrowserSlotView: NSView {
             hostedWebView !== webView ||
             !hostedWebViewConstraints.isEmpty ||
             !webView.translatesAutoresizingMaskIntoConstraints ||
-            webView.autoresizingMask != [.width, .height] ||
-            !Self.rectApproximatelyEqual(webView.frame, bounds)
+            webView.autoresizingMask != [.width, .height]
         guard needsFrameHosting else {
             needsLayout = true
             layoutSubtreeIfNeeded()
@@ -1688,7 +1687,8 @@ final class WindowBrowserSlotView: NSView {
         hostedWebViewConstraints = []
         hostedWebView = webView
         // Attached Web Inspector mutates the moved WKWebView's frame directly.
-        // Edge constraints fight side-docked resizing and cause visible churn.
+        // Re-pin only when hosting mode changes, not when WebKit resizes the page
+        // inside the slot for side-docked DevTools.
         webView.translatesAutoresizingMaskIntoConstraints = true
         webView.autoresizingMask = [.width, .height]
         webView.frame = bounds
diff --git a/Sources/Panels/BrowserPanelView.swift b/Sources/Panels/BrowserPanelView.swift
index c9130d59..16aeed0f 100644
--- a/Sources/Panels/BrowserPanelView.swift
+++ b/Sources/Panels/BrowserPanelView.swift
@@ -3786,8 +3786,7 @@ struct WebViewRepresentable: NSViewRepresentable {
                 hostedWebView !== webView ||
                 !hostedWebViewConstraints.isEmpty ||
                 !webView.translatesAutoresizingMaskIntoConstraints ||
-                webView.autoresizingMask != [.width, .height] ||
-                webView.frame != container.bounds
+                webView.autoresizingMask != [.width, .height]
             guard needsFrameHosting else {
                 needsLayout = true
                 layoutSubtreeIfNeeded()
@@ -3799,8 +3798,8 @@ struct WebViewRepresentable: NSViewRepresentable {
             hostedWebView = webView
 
             // WebKit's attached inspector does not reliably dock into a constraint-managed
-            // WKWebView hierarchy on macOS. Host the moved webview with autoresizing so
-            // the inspector can resize the content view in place.
+            // WKWebView hierarchy on macOS. Host the moved webview with autoresizing and
+            // keep WebKit-owned page frames intact when DevTools is side-docked.
             webView.translatesAutoresizingMaskIntoConstraints = true
             webView.autoresizingMask = [.width, .height]
             webView.frame = container.bounds