feat: enhance proxy management

frontend/src/i18n/locales/en.ts

@@ -1627,11 +1627,29 @@ export default {
         address: 'Address',
         status: 'Status',
         accounts: 'Accounts',
+        latency: 'Latency',
         actions: 'Actions'
       },
       testConnection: 'Test Connection',
       batchTest: 'Test All Proxies',
       testFailed: 'Failed',
+      latencyFailed: 'Connection failed',
+      batchTestEmpty: 'No proxies available for testing',
+      batchTestDone: 'Batch test completed for {count} proxies',
+      batchTestFailed: 'Batch test failed',
+      batchDeleteAction: 'Delete',
+      batchDelete: 'Batch delete',
+      batchDeleteConfirm: 'Delete {count} selected proxies? In-use ones will be skipped.',
+      batchDeleteDone: 'Deleted {deleted} proxies, skipped {skipped}',
+      batchDeleteSkipped: 'Skipped {skipped} proxies',
+      batchDeleteFailed: 'Batch delete failed',
+      deleteBlockedInUse: 'This proxy is in use and cannot be deleted',
+      accountsTitle: 'Accounts using this IP',
+      accountsEmpty: 'No accounts are using this proxy',
+      accountsFailed: 'Failed to load accounts list',
+      accountName: 'Account',
+      accountPlatform: 'Platform',
+      accountNotes: 'Notes',
       name: 'Name',
       protocol: 'Protocol',
       host: 'Host',