feat(inbounds): row action to delete all clients of an inbound

Adds POST /panel/api/inbounds/:id/delAllClients that collects every
client email from settings.clients[] and runs ClientService.BulkDelete
in one pass. Row action lives in the More menu as a danger item, only
shown for multi-user inbounds that currently have at least one client;
confirmation modal displays the live client count.

web/translation/zh-TW.json

@@ -289,6 +289,9 @@
       "resetConfirmContent": "將此入站的上/下行計數器歸零。",
       "cloneConfirmTitle": "複製入站「{remark}」？",
       "cloneConfirmContent": "使用新連接埠和空客戶端清單建立副本。",
+      "delAllClients": "刪除所有客戶端",
+      "delAllClientsConfirmTitle": "從「{remark}」中刪除全部 {count} 個客戶端？",
+      "delAllClientsConfirmContent": "從此入站中移除每個客戶端並捨棄其流量記錄。入站本身將保留。此操作無法復原。",
       "exportLinksTitle": "匯出入站連結",
       "exportSubsTitle": "匯出訂閱連結",
       "exportAllLinksTitle": "匯出所有入站連結",