feat(clients): add bulk enable/disable and move selection actions into More menu

Add bulkEnable/bulkDisable named endpoints backed by a shared internal impl, and consolidate the per-selection actions (attach, detach, add to group, ungroup, enable, disable, adjust, sub links) into the clients table's More dropdown so the toolbar only shows the selection count and delete. Translate the new enable/disable confirm dialogs and toasts across all 13 locales.

internal/web/translation/es-ES.json

@@ -816,6 +816,12 @@
       "attach": "Asociar",
       "adjust": "Ajustar",
       "subLinks": "Enlaces sub",
+      "enable": "Habilitar",
+      "disable": "Deshabilitar",
+      "bulkEnableConfirmTitle": "¿Habilitar {count} clientes?",
+      "bulkEnableConfirmContent": "Habilita cada cliente seleccionado en todos los inbounds asociados. Los clientes cuya cuota se haya agotado o cuya caducidad haya pasado se deshabilitarán de nuevo automáticamente.",
+      "bulkDisableConfirmTitle": "¿Deshabilitar {count} clientes?",
+      "bulkDisableConfirmContent": "Deshabilita cada cliente seleccionado en todos los inbounds asociados. Pierden el acceso de inmediato, pero se conservan sus registros y su tráfico.",
       "selectedCount": "{count} seleccionado(s)",
       "attachSelected": "Asociar ({count})",
       "attachToInboundsTitle": "Asociar {count} cliente(s) a entrada(s)",
@@ -872,6 +878,10 @@
         "allTrafficsReset": "Tráfico de todos los clientes restablecido",
         "bulkDeleted": "{count} clientes eliminados",
         "bulkDeletedMixed": "{ok} eliminados, {failed} fallidos",
+        "bulkEnabled": "{count} clientes habilitados",
+        "bulkEnabledMixed": "{ok} habilitados, {failed} fallidos",
+        "bulkDisabled": "{count} clientes deshabilitados",
+        "bulkDisabledMixed": "{ok} deshabilitados, {failed} fallidos",
         "bulkCreated": "{count} clientes creados",
         "bulkCreatedMixed": "{ok} creados, {failed} fallidos",
         "bulkAdjusted": "{count} clientes ajustados",