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, 17 insertions, 0 deletions

diff --git a/Hutch.xcodeproj/project.pbxproj b/Hutch.xcodeproj/project.pbxproj
index cb7bea9..d844cd3 100644
--- a/Hutch.xcodeproj/project.pbxproj
+++ b/Hutch.xcodeproj/project.pbxproj
@@ -16,6 +16,7 @@
 		8BE09E812F7B2CC300F88693 /* styles.css in Resources */ = {isa = PBXBuildFile; fileRef = 8BE09E7D2F7B2CC300F88693 /* styles.css */; };
 		8BE09E822F7B2CC300F88693 /* privacy.html in Resources */ = {isa = PBXBuildFile; fileRef = 8BE09E7B2F7B2CC300F88693 /* privacy.html */; };
 		8BF100032F9A000100000001 /* Markdown in Frameworks */ = {isa = PBXBuildFile; productRef = 8BF100022F9A000100000001 /* Markdown */; };
+		8BF100052F9A000100000002 /* Splash in Frameworks */ = {isa = PBXBuildFile; productRef = 8BF100042F9A000100000002 /* Splash */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -116,6 +117,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				8BF100032F9A000100000001 /* Markdown in Frameworks */,
+				8BF100052F9A000100000002 /* Splash in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -198,6 +200,7 @@
 			name = Hutch;
 			packageProductDependencies = (
 				8BF100022F9A000100000001 /* Markdown */,
+				8BF100042F9A000100000002 /* Splash */,
 			);
 			productName = Hutch;
 			productReference = 8B4B28D12F6704280045FA19 /* Hutch.app */;
@@ -279,6 +282,7 @@
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
 				8BF100012F9A000100000001 /* XCRemoteSwiftPackageReference "swift-markdown" */,
+				8BF100062F9A000100000002 /* XCRemoteSwiftPackageReference "Splash" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = 8B4B28D22F6704280045FA19 /* Products */;
@@ -710,6 +714,14 @@
 				minimumVersion = 0.7.3;
 			};
 		};
+		8BF100062F9A000100000002 /* XCRemoteSwiftPackageReference "Splash" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/JohnSundell/Splash";
+			requirement = {
+				kind = upToNextMajorVersion;
+				minimumVersion = 0.16.0;
+			};
+		};
 /* End XCRemoteSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
@@ -718,6 +730,11 @@
 			package = 8BF100012F9A000100000001 /* XCRemoteSwiftPackageReference "swift-markdown" */;
 			productName = Markdown;
 		};
+		8BF100042F9A000100000002 /* Splash */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = 8BF100062F9A000100000002 /* XCRemoteSwiftPackageReference "Splash" */;
+			productName = Splash;
+		};
 /* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 8B4B28C92F6704280045FA19 /* Project object */;