feat(i18n): update translations for SQL backup feature

- Update Chinese translations for SQL import/export
- Update English translations for SQL import/export
- Change terminology from 'config file' to 'SQL backup'
- Update error messages and UI hints

src/i18n/locales/en.json

@@ -145,10 +145,10 @@
     "themeLight": "Light",
     "themeDark": "Dark",
     "themeSystem": "System",
-    "importExport": "Import/Export Config",
+    "importExport": "SQL Import/Export",
-    "importExportHint": "Import or export CC Switch configuration for backup or migration.",
+    "importExportHint": "Import or export database SQL backups for migration or restore.",
-    "exportConfig": "Export Config to File",
+    "exportConfig": "Export SQL Backup",
-    "selectConfigFile": "Select Config File",
+    "selectConfigFile": "Select SQL File",
     "noFileSelected": "No configuration file selected.",
     "import": "Import",
     "importing": "Importing...",
@@ -159,8 +159,8 @@
     "importPartialHint": "Please manually reselect the provider to refresh the live configuration.",
     "configExported": "Config exported to:",
     "exportFailed": "Export failed",
-    "selectFileFailed": "Failed to select file",
+    "selectFileFailed": "Please choose a valid SQL backup file",
-    "configCorrupted": "Config file may be corrupted or invalid",
+    "configCorrupted": "SQL file may be corrupted or invalid",
     "backupId": "Backup ID",
     "autoReload": "Data will refresh automatically in 2 seconds...",
     "languageOptionChinese": "中文",

src/i18n/locales/zh.json

@@ -145,10 +145,10 @@
     "themeLight": "浅色",
     "themeDark": "深色",
     "themeSystem": "跟随系统",
-    "importExport": "导入导出配置",
+    "importExport": "SQL 导入导出",
-    "importExportHint": "导入导出 CC Switch 配置，便于备份或迁移。",
+    "importExportHint": "导入/导出数据库 SQL 备份，便于备份或迁移。",
-    "exportConfig": "导出配置到文件",
+    "exportConfig": "导出 SQL 备份",
-    "selectConfigFile": "选择配置文件",
+    "selectConfigFile": "选择 SQL 文件",
     "noFileSelected": "尚未选择配置文件。",
     "import": "导入",
     "importing": "导入中...",
@@ -159,8 +159,8 @@
     "importPartialHint": "请手动重新选择一次供应商以刷新对应配置。",
     "configExported": "配置已导出到：",
     "exportFailed": "导出失败",
-    "selectFileFailed": "选择文件失败",
+    "selectFileFailed": "请选择有效的 SQL 备份文件",
-    "configCorrupted": "配置文件可能已损坏或格式不正确",
+    "configCorrupted": "SQL 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",