[feat] Add file upload support to canvas background image setting (#3958)

Co-authored-by: github-actions <github-actions@github.com>

src/locales/zh/main.json

@@ -253,6 +253,7 @@
     "capture": "捕获",
     "category": "类别",
     "choose_file_to_upload": "选择要上传的文件",
+    "clear": "清除",
     "close": "关闭",
     "color": "颜色",
     "comingSoon": "即将推出",
@@ -293,6 +294,7 @@
     "goToNode": "转到节点",
     "icon": "图标",
     "imageFailedToLoad": "图像加载失败",
+    "imageUrl": "图片网址",
     "import": "导入",
     "inProgress": "进行中",
     "insert": "插入",