feat(ui): add inline conflict model (file/hunk with resolution)

src/ClaudeDo.Ui/ViewModels/Conflicts/ConflictModels.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Linq;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace ClaudeDo.Ui.ViewModels.Conflicts;
+
+public sealed partial class ConflictHunk : ObservableObject
+{
+    public string Ours { get; }
+    public string Theirs { get; }
+    public string? Base { get; }
+
+    [ObservableProperty] private string? _resolution;
+
+    public bool IsResolved => Resolution is not null;
+
+    public ConflictHunk(string ours, string theirs, string? @base)
+    {
+        Ours = ours;
+        Theirs = theirs;
+        Base = @base;
+    }
+
+    partial void OnResolutionChanged(string? value) => OnPropertyChanged(nameof(IsResolved));
+
+    [RelayCommand] private void AcceptCurrent()  => Resolution = Ours;
+    [RelayCommand] private void AcceptIncoming() => Resolution = Theirs;
+    [RelayCommand] private void AcceptBoth()     => Resolution = Ours + Theirs;
+    [RelayCommand] private void EditManually()   => Resolution ??= Ours;
+}
+
+public sealed class ConflictFile
+{
+    public string Path { get; }
+    public IReadOnlyList<ConflictHunk> Hunks { get; }
+
+    public ConflictFile(string path, IReadOnlyList<ConflictHunk> hunks)
+    {
+        Path = path;
+        Hunks = hunks;
+    }
+
+    public bool AllHunksResolved => Hunks.Count > 0 && Hunks.All(h => h.IsResolved);
+
+    /// <summary>Merged file content: concatenation of each hunk's resolution
+    /// (single whole-file hunk today; concatenation stays correct for multi-hunk later).</summary>
+    public string ComposeResolvedContent() => string.Concat(Hunks.Select(h => h.Resolution));
+}