add: local config import and export (#84)

* add: local config import and export

* Fix import refresh flow and typings

* Clarify import refresh messaging

* Limit stored import backups

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Co-authored-by: Jason <farion1231@gmail.com>

src/i18n/locales/zh.json

@@ -61,6 +61,19 @@
     "title": "设置",
     "general": "通用",
     "language": "界面语言",
+    "importExport": "导入导出配置",
+    "exportConfig": "导出配置到文件",
+    "selectConfigFile": "选择配置文件",
+    "import": "导入",
+    "importing": "导入中...",
+    "importSuccess": "导入成功！",
+    "importFailed": "导入失败",
+    "configExported": "配置已导出到：",
+    "exportFailed": "导出失败",
+    "selectFileFailed": "选择文件失败",
+    "configCorrupted": "配置文件可能已损坏或格式不正确",
+    "backupId": "备份ID",
+    "autoReload": "数据将在2秒后自动刷新...",
     "languageOptionChinese": "中文",
     "languageOptionEnglish": "English",
     "windowBehavior": "窗口行为",