feat: add proxy import flow

frontend/src/i18n/locales/en.ts

@@ -165,6 +165,7 @@ export default {
     selectedCount: '({count} selected)',
     refresh: 'Refresh',
     settings: 'Settings',
+    chooseFile: 'Choose File',
     notAvailable: 'N/A',
     now: 'Now',
     unknown: 'Unknown',
@@ -1190,7 +1191,7 @@ export default {
       syncFromCrs: 'Sync from CRS',
       dataExport: 'Export',
       dataExportSelected: 'Export Selected',
-      dataExportIncludeProxies: 'Include proxies (unchecked = no proxy linkage on import)',
+      dataExportIncludeProxies: 'Include proxies linked to the exported accounts',
       dataImport: 'Import',
       dataExportConfirmMessage: 'The exported data contains sensitive account and proxy information. Store it securely.',
       dataExportConfirm: 'Confirm Export',
@@ -1198,7 +1199,7 @@ export default {
       dataExportFailed: 'Failed to export data',
       dataImportTitle: 'Import Data',
       dataImportHint: 'Upload the exported JSON file to import accounts and proxies.',
-      dataImportWarning: 'Import will create new accounts/proxies; groups must be bound manually. Ensure no conflicts in the target instance.',
+      dataImportWarning: 'Import will create new accounts/proxies; groups must be bound manually. Ensure existing data does not conflict.',
       dataImportFile: 'Data file',
       dataImportButton: 'Start Import',
       dataImporting: 'Importing...',
@@ -1901,6 +1902,21 @@ export default {
       createProxy: 'Create Proxy',
       editProxy: 'Edit Proxy',
       deleteProxy: 'Delete Proxy',
+      dataImport: 'Import',
+      dataImportTitle: 'Import Proxies',
+      dataImportHint: 'Upload the exported proxy JSON file to import proxies in bulk.',
+      dataImportWarning: 'Import will create or reuse proxies, keep their status, and trigger latency checks after completion.',
+      dataImportFile: 'Data File',
+      dataImportButton: 'Start Import',
+      dataImporting: 'Importing...',
+      dataImportSelectFile: 'Please select a data file',
+      dataImportParseFailed: 'Failed to parse data',
+      dataImportFailed: 'Failed to import data',
+      dataImportResult: 'Import Result',
+      dataImportResultSummary: 'Created {proxy_created}, reused {proxy_reused}, failed {proxy_failed}',
+      dataImportErrors: 'Failure Details',
+      dataImportSuccess: 'Import completed: created {proxy_created}, reused {proxy_reused}',
+      dataImportCompletedWithErrors: 'Import completed with errors: failed {proxy_failed}',
       dataExport: 'Export',
       dataExportConfirmMessage: 'The exported data contains sensitive proxy information. Store it securely.',
       dataExportConfirm: 'Confirm Export',