feat(ui): add select all / clear all shortcuts for inbound multi-select (#5175)

* feat(ui): add select all / clear all shortcuts for inbound multi-select

Adds 'Select all' and 'Clear all' buttons above the inbound multi-select in:
- ClientFormModal (add/edit client)
- BulkAttachInboundsModal (bulk attach clients to inbounds)
- BulkDetachInboundsModal (bulk detach clients from inbounds)
- ClientBulkAddModal (add bulk clients)

Extracts the repeated button logic into a reusable SelectAllClearButtons component.

Includes i18n keys for all 13 supported languages with proper translations.

Closes #5144

* refactor(form): decouple SelectAllClearButtons labels and harden select-all

Accept optional selectAllLabel/clearLabel props so the generic form component is not tied to the client-inbound i18n keys (defaults unchanged). Compute the all-selected state by checking every option is present and union the current value on select-all, so it stays correct if value holds ids outside options.

---------

Co-authored-by: Sanaei <ho3ein.sanaei@gmail.com>

frontend/src/pages/clients/BulkAttachInboundsModal.tsx

@@ -2,6 +2,7 @@ import { useEffect, useMemo, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Alert, Modal, Select, Typography, message } from 'antd';
 
+import { SelectAllClearButtons } from '@/components/form';
 import type { InboundOption } from '@/hooks/useClients';
 import { formatInboundLabel } from '@/lib/inbounds/label';
 import type { BulkAttachResult } from '@/schemas/client';
@@ -82,16 +83,23 @@ export default function BulkAttachInboundsModal({
         {targetOptions.length === 0 ? (
           <Alert type="info" showIcon message={t('pages.clients.attachToInboundsNoTargets')} />
         ) : (
-          <Select
-            mode="multiple"
-            style={{ width: '100%' }}
-            value={targetIds}
-            onChange={setTargetIds}
-            options={targetOptions}
-            placeholder={t('pages.clients.attachToInboundsTargets')}
-            optionFilterProp="label"
-            autoFocus
-          />
+          <>
+            <SelectAllClearButtons
+              options={targetOptions}
+              value={targetIds}
+              onChange={setTargetIds}
+            />
+            <Select
+              mode="multiple"
+              style={{ width: '100%' }}
+              value={targetIds}
+              onChange={setTargetIds}
+              options={targetOptions}
+              placeholder={t('pages.clients.attachToInboundsTargets')}
+              optionFilterProp="label"
+              autoFocus
+            />
+          </>
         )}
       </Modal>
     </>