fix(ui): theme-derived sftp/monitor surfaces, transfer cancel button, dialog cleanup; drop dead autoWrap; gentler bg-image default

src/shared/i18n/dicts/zh-CN/settings.ts

@@ -67,8 +67,6 @@ const settings: Record<string, string> = {
   'settings.rendererMode.domHint': '纯 CPU 渲染，兼容性最好，适合无 GPU 或远程桌面环境',
   'settings.render.modeLabel': '渲染模式',
   'settings.render.modeHint': '终端单元渲染加速方式，改动将应用到所有终端',
-  'settings.render.autoWrap': '自动换行',
-  'settings.render.autoWrapDesc': '超出宽度时自动折行',
   'settings.render.copyOnSelect': '选中即复制',
   'settings.render.copyOnSelectDesc': '鼠标选中文字时自动复制',
   'settings.render.pasteRiskConfirm': '粘贴风险确认',
@@ -270,7 +268,7 @@ const settings: Record<string, string> = {
   'settings.theme.accent': '标签强调色',
   'settings.theme.accentDesc': '活动标签边框、侧栏指示条与 SSH 徽章的强调颜色',
   'settings.theme.backgroundImage': '背景图片',
-  'settings.theme.backgroundImageDesc': '为终端设置一张背景图片；移除后恢复纯色背景',
+  'settings.theme.backgroundImageDesc': '为终端设置一张背景图片；移除后恢复纯色背景；文字看不清时调低透明度（亮图建议 20–40%）',
   'settings.theme.chooseImage': '选择图片',
   'settings.theme.clearImage': '移除图片',
   'settings.theme.imageOpacity': '图片不透明度',