修复附注插入问题

Cad/TemplateDrawingService.cs

@@ -313,7 +313,73 @@ namespace CadParamPluging.Cad
 
             if (candidates.Count == 0)
             {
-                return new NoteApplyResult { Applied = false, Message = "未找到附注文本目标（包含‘附注’且包含占位符*），跳过。" };
+                // 尝试基于白框定位自动创建附注
+                if (!string.IsNullOrWhiteSpace(schema.NoteTemplateText))
+                {
+                    // 基于当前 Space 查找白框，以支持 Layout
+                    var spaceEntList = space.Cast<ObjectId>()
+                        .Select(id => 
+                        {
+                            try { return tr.GetObject(id, OpenMode.ForRead, false) as Entity; }
+                            catch { return null; }
+                        })
+                        .Where(e => e != null && !e.IsErased)
+                        .ToList();
+
+                    var frame = ComputeWhiteFrameExtentsFromEntities(tr, spaceEntList);
+                    if (frame.HasValue)
+                    {
+                        var f = frame.Value;
+                        var w = f.MaxPoint.X - f.MinPoint.X;
+                        var h = f.MaxPoint.Y - f.MinPoint.Y;
+
+                        // 改为左下角锚定 (BottomLeft)，实现"贴合左边和下边"的效果
+                        // MText 以 BottomLeft 对齐时，插入点位于文字块左下角，内容向上生长
+                        var insertX = f.MinPoint.X + w * 0.005; // 左边距 0.5%
+                        var insertY = f.MinPoint.Y + h * 0.005; // 下边距 0.5%
+                        var insertPoint = new Point3d(insertX, insertY, 0);
+
+                        var effectiveForCreation = NoteTemplateEngine.BuildEffectiveValueKeyBindings(schema.NoteBindings);
+                        var renderedForCreation = NoteTemplateEngine.Render(schema.NoteTemplateText, effectiveForCreation, bag.GetString);
+
+                        var mt = new MText();
+                        mt.Contents = ToMTextContents(renderedForCreation);
+                        mt.Location = insertPoint;
+                        mt.TextHeight = 3.5; 
+                        mt.Attachment = AttachmentPoint.BottomLeft; // 关键：锚点在左下，文字向上延伸
+                        mt.Width = w * 0.45; // 宽度限制为45%
+                        mt.ColorIndex = 7; 
+                        mt.Layer = "0";
+
+                        try
+                        {
+                            var layerTbl = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);
+                            if (layerTbl.Has("TEXT"))
+                            {
+                                mt.Layer = "TEXT";
+                            }
+                            else if (layerTbl.Has("文字"))
+                            {
+                                mt.Layer = "文字";
+                            }
+                        }
+                        catch { }
+
+                        space.AppendEntity(mt);
+                        tr.AddNewlyCreatedDBObject(mt, true);
+
+                        return new NoteApplyResult
+                        {
+                            Applied = true,
+                            TargetKind = "CreatedMText",
+                            PlaceholderCountInDwg = 0,
+                            RenderedText = renderedForCreation,
+                            Message = "未找到附注定位，已自动创建 (左下角对齐)。"
+                        };
+                    }
+                }
+
+                return new NoteApplyResult { Applied = false, Message = "未找到附注文本目标（包含‘附注’且包含占位符*），且无法自动定位创建，跳过。" };
             }
 
             var best = candidates.OrderByDescending(c => c.Score).FirstOrDefault();
@@ -356,15 +422,11 @@ namespace CadParamPluging.Cad
                 return null;
             }
 
-            if (scanModelSpace)
+            // Default to ModelSpace if scanModelSpace requested OR layoutName is null/empty implicitly aiming for Model
+            if (scanModelSpace || string.IsNullOrWhiteSpace(layoutName) || string.Equals(layoutName, "Model", StringComparison.OrdinalIgnoreCase))
             {
                 var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
-                return (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead);
+                return (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
-            }
-
-            if (string.IsNullOrWhiteSpace(layoutName))
-            {
-                return null;
             }
 
             var layoutDict = (DBDictionary)tr.GetObject(db.LayoutDictionaryId, OpenMode.ForRead);
@@ -384,7 +446,7 @@ namespace CadParamPluging.Cad
             }
 
             var layout = (Layout)tr.GetObject(layoutId, OpenMode.ForRead);
-            return (BlockTableRecord)tr.GetObject(layout.BlockTableRecordId, OpenMode.ForRead);
+            return (BlockTableRecord)tr.GetObject(layout.BlockTableRecordId, OpenMode.ForWrite);
         }
 
         private static void CollectNoteCandidates(Transaction tr, Entity ent, HashSet<ObjectId> visitedBlocks, List<NoteCandidate> candidates)