feat(编辑能力): 新增画笔和注解创建，完善水印、印章与链接编辑，优化选取和保存体验

ofdgo_editor_open.go

@@ -31,13 +31,15 @@ import (
 
 // editorSource 保留输入包及按需加载的原始页面
 type editorSource struct {
-	reader    *Reader
-	document  *Document
-	info      DocInfo
-	directory string
-	pages     map[string]*editorSourcePage
-	origins   map[string]*editorObjectOrigin
-	idsReady  bool
+	reader           *Reader
+	document         *Document
+	info             DocInfo
+	directory        string
+	pages            map[string]*editorSourcePage
+	origins          map[string]*editorObjectOrigin
+	idsReady         bool
+	annotationStates map[string]map[string]editorCompositeState
+	annotationPages  map[string]bool
 }
 
 // editorObjectOrigin 保留原对象的XML语义，供复制和局部更新复用