Rewrite file viewer with pinned gutter, syntax highlighting, and toolbar

Replace the SwiftUI-only CodeFileTextView with a UIViewRepresentable backed
by CodeFileUIView. The previous approach could not support a fixed line number
gutter while independently scrolling code content horizontally.

Changes:
- Gutter is pinned outside the horizontal scroll view and never scrolls left
- Vertical scroll is handled by a single outer UIScrollView shared by both
  the gutter and code content, keeping them in sync
- Line numbers are right-aligned in a fixed-width gutter calculated from
  the total line count
- Syntax highlighting via Splash for .swift files, with plain monospaced
  rendering as fallback for unsupported file types
- Wrap toggle persisted via AppStorage (wrapRepositoryFileLines)
- Bottom toolbar replaces the floating Share button, adding Copy All and
  Wrap toggle actions
- Copy All shows a brief checkmark confirmation that resets after 2 seconds
- Font fixed at SFMono-Regular 12pt, not scaled with Dynamic Type

Implements: https://todo.sr.ht/~ccleberg/Hutch/7

1 files changed, 10 insertions, 1 deletions

diff --git a/Hutch.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Hutch.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index a2a45a3..ae6b756 100644
--- a/Hutch.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/Hutch.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -1,7 +1,16 @@
 {
-  "originHash" : "b809819531d430dc5b7a0fb1fb5538d0321c5d541eed52a9990f37c38dd0f98a",
+  "originHash" : "65542d8a5fbbad8dd7d07c8901c1cc48b3aba12cef8da1f062bd28d9b3a6ba50",
   "pins" : [
     {
+      "identity" : "splash",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/JohnSundell/Splash",
+      "state" : {
+        "revision" : "7f4df436eb78fe64fe2c32c58006e9949fa28ad8",
+        "version" : "0.16.0"
+      }
+    },
+    {
       "identity" : "swift-cmark",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/swiftlang/swift-cmark.git",