Fix several bugs ahead of 2.6.1v2.6.1

FileTreeView: when wrap is OFF, activate an explicit width constraint on
the code container derived from the widest line, giving the horizontal
scroll view a defined content size. Previously the constraint was
deactivated with nothing to replace it, making horizontal scrolling
unreliable. Also set horizontalScrollView.isScrollEnabled = !wrapLines
to prevent gesture conflicts when wrap is ON.

InboxView: remove the unnecessary loadThreads() network call fired after
markAllThreadsRead(). The threads array is already updated optimistically
and read state is persisted via InboxReadStateStore, so the refetch was
redundant and caused a brief loading flash.

HomeView: add scenePhase onChange handler to refresh dashboard data when
the app returns to the foreground, matching the existing pattern in
InboxView.

DiffView: wrap DiffBlockView content in a horizontal ScrollView so long
diff lines are readable. Switch inner VStack to LazyVStack for better
performance on large diffs.

SettingsView: replace direct UserDefaults access in behaviorSection with
@AppStorage, consistent with the rest of the app.

1 files changed, 17 insertions, 1 deletions

diff --git a/Hutch/Views/Repositories/FileTreeView.swift b/Hutch/Views/Repositories/FileTreeView.swift
index 8bedb73..adacb2e 100644
--- a/Hutch/Views/Repositories/FileTreeView.swift
+++ b/Hutch/Views/Repositories/FileTreeView.swift
@@ -441,6 +441,7 @@ private final class CodeFileUIView: UIView {
     private let codeStackView = UIStackView()
 
     private var codeContainerWidthConstraint: NSLayoutConstraint?
+    private var codeContainerExplicitWidthConstraint: NSLayoutConstraint?
     private var gutterWidthConstraint: NSLayoutConstraint?
 
     private var rows: [LineRow] = []
@@ -524,6 +525,7 @@ private final class CodeFileUIView: UIView {
         codeContainerView.addSubview(codeStackView)
 
         codeContainerWidthConstraint = codeContainerView.widthAnchor.constraint(equalTo: horizontalScrollView.frameLayoutGuide.widthAnchor)
+        codeContainerExplicitWidthConstraint = codeContainerView.widthAnchor.constraint(equalToConstant: 0)
         gutterWidthConstraint = gutterContainerView.widthAnchor.constraint(equalToConstant: 0)
 
         NSLayoutConstraint.activate([
@@ -627,12 +629,14 @@ private final class CodeFileUIView: UIView {
 
     private func updateWrapConfiguration(resetHorizontalOffset: Bool) {
         horizontalScrollView.alwaysBounceHorizontal = !wrapLines
-        horizontalScrollView.isScrollEnabled = true
+        horizontalScrollView.isScrollEnabled = !wrapLines
 
         if wrapLines {
             codeContainerWidthConstraint?.isActive = true
+            codeContainerExplicitWidthConstraint?.isActive = false
         } else {
             codeContainerWidthConstraint?.isActive = false
+            codeContainerExplicitWidthConstraint?.isActive = true
         }
 
         for row in rows {
@@ -664,6 +668,18 @@ private final class CodeFileUIView: UIView {
             row.codeHeightConstraint.constant = rowHeight
         }
 
+        if wrapLines {
+            codeContainerExplicitWidthConstraint?.constant = 0
+        } else {
+            let maxLineWidth = rows.reduce(CGFloat(0)) { partialResult, row in
+                let measuredWidth = row.codeLabel.sizeThatFits(
+                    CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude)
+                ).width
+                return max(partialResult, ceil(measuredWidth))
+            }
+            codeContainerExplicitWidthConstraint?.constant = max(maxLineWidth, availableWidth)
+        }
+
         needsLineLayoutUpdate = false
     }