1 files changed, 79 insertions, 0 deletions
diff --git a/Hutch/Views/Repositories/DiffView.swift b/Hutch/Views/Repositories/DiffView.swift
new file mode 100644
index 0000000..b1db464
--- /dev/null
+++ b/Hutch/Views/Repositories/DiffView.swift
@@ -0,0 +1,79 @@
+import SwiftUI
+
+/// Renders a unified diff string with syntax highlighting:
+/// - Green background for added lines (+)
+/// - Red background for removed lines (-)
+/// - Gray for hunk headers (@@)
+/// - File headers (--- / +++ / diff) in bold
+struct DiffView: View {
+    let diff: String
+
+    var body: some View {
+        let lines = diff.components(separatedBy: "\n")
+
+        LazyVStack(alignment: .leading, spacing: 0) {
+            ForEach(Array(lines.enumerated()), id: \.offset) { _, line in
+                DiffLineView(line: line)
+            }
+        }
+        .font(.caption.monospaced())
+    }
+}
+
+private struct DiffLineView: View {
+    let line: String
+
+    var body: some View {
+        Text(line.isEmpty ? " " : line)
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .padding(.horizontal, 8)
+            .padding(.vertical, 1)
+            .background(backgroundColor)
+            .foregroundStyle(foregroundColor)
+            .fontWeight(isHeader ? .semibold : .regular)
+    }
+
+    private var kind: DiffLineKind {
+        if line.hasPrefix("@@") { return .hunk }
+        if line.hasPrefix("+++") || line.hasPrefix("---") { return .fileHeader }
+        if line.hasPrefix("diff ") { return .fileHeader }
+        if line.hasPrefix("index ") { return .meta }
+        if line.hasPrefix("+") { return .added }
+        if line.hasPrefix("-") { return .removed }
+        return .context
+    }
+
+    private var backgroundColor: Color {
+        switch kind {
+        case .added:      .green.opacity(0.15)
+        case .removed:    .red.opacity(0.15)
+        case .hunk:       .gray.opacity(0.12)
+        case .fileHeader: .gray.opacity(0.08)
+        case .meta:       .gray.opacity(0.05)
+        case .context:    .clear
+        }
+    }
+
+    private var foregroundColor: Color {
+        switch kind {
+        case .added:   .green
+        case .removed: .red
+        case .hunk:    .secondary
+        case .meta:    .secondary
+        default:       .primary
+        }
+    }
+
+    private var isHeader: Bool {
+        kind == .fileHeader
+    }
+}
+
+private enum DiffLineKind {
+    case added
+    case removed
+    case hunk
+    case fileHeader
+    case meta
+    case context
+}