v1.2.0: 重构为插件+独立Manager架构，横版UI，精确保留文本框边距的文档转换

Manager/Services/InkService.cs

@@ -0,0 +1,28 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace BetterSeewo.Manager.Services
+{
+    public class InkService
+    {
+        public async Task ExportInkAsync(string filePath)
+        {
+            await Task.Run(() =>
+            {
+                var dir = Path.GetDirectoryName(filePath);
+                if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
+                    Directory.CreateDirectory(dir);
+                File.WriteAllText(filePath, "{\"message\":\"ink_export_placeholder\"}");
+            });
+        }
+
+        public async Task ImportInkAsync(string filePath)
+        {
+            await Task.Run(() =>
+            {
+                if (!File.Exists(filePath)) return;
+            });
+        }
+    }
+}