feat: 添加批量删除功能

packages/frontend/src/locales/en-US.json

@@ -983,7 +983,13 @@
       "menuItem": "Manage Tag",
       "cannotManageUntagged": "Cannot manage connections for 'Untagged' group.",
       "invertSelection": "Invert Selection"
-    }
+    },
+    "deleteAllConnectionsInGroupMenu": "Delete All Connections in Group",
+    "noConnectionsToDeleteInGroup": "No connections to delete in group '{groupName}'.",
+    "confirmDeleteAllConnectionsInGroup": "Are you sure you want to delete all {count} connections in group '{groupName}'? This cannot be undone.",
+    "allConnectionsInGroupDeletedSuccess": "{count} connections successfully deleted from group '{groupName}'.",
+    "cannotDeleteFromUntagged": "Cannot use this option to delete connections from the 'Untagged' group.",
+    "someConnectionsInGroupDeleteFailed": "{count} connections in group '{groupName}' failed to delete."
   },
   "remoteDesktopModal": {
     "title": "Remote Desktop",

packages/frontend/src/locales/ja-JP.json

@@ -1203,7 +1203,13 @@
           "menuItem": "タグを管理",
           "cannotManageUntagged": "「タグなし」グループの接続は管理できません。",
           "invertSelection": "選択を反転"
-        }
+        },
+        "deleteAllConnectionsInGroupMenu": "グループ内の全接続を削除",
+        "noConnectionsToDeleteInGroup": "グループ '{groupName}' に削除可能な接続がありません。",
+        "confirmDeleteAllConnectionsInGroup": "グループ '{groupName}' 内の全 {count} 個の接続を削除してもよろしいですか？この操作は元に戻せません。",
+        "allConnectionsInGroupDeletedSuccess": "グループ '{groupName}' から {count} 個の接続を正常に削除しました。",
+        "cannotDeleteFromUntagged": "このオプションを使用して「未分類」グループから接続を削除することはできません。",
+        "someConnectionsInGroupDeleteFailed": "グループ '{groupName}' 内の {count} 個の接続の削除に失敗しました。"
       },
       "sshKeys": {
         "selector": {

packages/frontend/src/locales/zh-CN.json

@@ -985,7 +985,13 @@
       "menuItem": "管理标签",
       "cannotManageUntagged": "无法管理“未标记”分组的连接。",
       "invertSelection": "反选"
-    }
+    },
+    "deleteAllConnectionsInGroupMenu": "删除分组内所有连接",
+    "noConnectionsToDeleteInGroup": "分组 '{groupName}' 中没有可删除的连接。",
+    "confirmDeleteAllConnectionsInGroup": "确定要删除分组 '{groupName}' 中的全部 {count} 个连接吗？此操作不可撤销。",
+    "allConnectionsInGroupDeletedSuccess": "已成功从分组 '{groupName}' 中删除 {count} 个连接。",
+    "cannotDeleteFromUntagged": "不能使用此选项从“未标记”分组中删除连接。",
+    "someConnectionsInGroupDeleteFailed": "分组 '{groupName}' 中的 {count} 个连接未能删除。"
   },
   "remoteDesktopModal": {
     "title": "远程桌面",