fix: Editor 回显 - key+initialValue 替代 value 受控

- key={id} 确保切换模板时 Editor 重新挂载加载正确内容
- initialValue 仅首次加载，无 value 避免编辑被覆盖
- 移除 setup.init 重复调用(已由 onInit 处理)

web/src/pages/TemplateEditor.tsx

@@ -337,11 +337,10 @@ export default function TemplateEditor() {
             </div>
           )}
           <Editor
+            key={id}
             tinymceScriptSrc="/tinymce/tinymce.min.js"
-            onInit={(_evt, editor) => {
-              handleEditorInit(null, editor);
-              if (htmlContent) editor.setContent(htmlContent);
-            }}
+            initialValue={htmlContent}
+            onInit={handleEditorInit}
             init={{
               height: "100%",
               menubar: true,
@@ -355,11 +354,7 @@ export default function TemplateEditor() {
               toolbar:
                 "undo redo | blocks | bold italic forecolor | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | removeformat | help",
               content_style: "body { font-family: Arial, sans-serif; font-size: 14px; }",
-              setup: (editor) => {
-                editor.on("init", () => {
-                  handleEditorInit(null, editor);
-                });
-              },
+            }}
             }}
           />
         </Content>