refactor(frontend): migrate off deprecated Ant Design 6 props

The repo's type-aware deprecation sweep (eslint.deprecated.config.js) reported fourteen findings; it now reports zero. Alert message becomes title and closable+onClose becomes closable.onClose; Select optionFilterProp moves into showSearch.optionFilterProp and suffixIcon becomes suffix; Drawer width becomes size; Progress trailColor becomes railColor. Behavior is unchanged apart from a few single-mode selects gaining type-to-filter, which the old prop already implied.

frontend/src/pages/clients/BulkAttachInboundsModal.tsx

@@ -96,7 +96,7 @@ export default function BulkAttachInboundsModal({
               onChange={setTargetIds}
               options={targetOptions}
               placeholder={t('pages.clients.attachToInboundsTargets')}
-              optionFilterProp="label"
+              showSearch={{ optionFilterProp: 'label' }}
               autoFocus
             />
           </>

frontend/src/pages/clients/BulkDetachInboundsModal.tsx

@@ -96,7 +96,7 @@ export default function BulkDetachInboundsModal({
               onChange={setTargetIds}
               options={targetOptions}
               placeholder={t('pages.clients.detachFromInboundsTargets')}
-              optionFilterProp="label"
+              showSearch={{ optionFilterProp: 'label' }}
               autoFocus
             />
           </>

frontend/src/pages/clients/ClientsPage.tsx

@@ -1212,7 +1212,7 @@ export default function ClientsPage() {
                           value={sortValueFor(sortColumn, sortOrder)}
                           aria-label={t('sort')}
                           size={isMobile ? 'small' : 'middle'}
-                          suffixIcon={<SortAscendingOutlined />}
+                          suffix={<SortAscendingOutlined />}
                           style={{ minWidth: isMobile ? 130 : 200 }}
                           onChange={(value) => {
                             const opt = SORT_OPTIONS.find((o) => o.value === value);

frontend/src/pages/clients/FilterDrawer.tsx

@@ -89,7 +89,7 @@ export default function FilterDrawer({
       title={t('pages.clients.filterTitle')}
       open={open}
       onClose={() => onOpenChange(false)}
-      width={420}
+      size={420}
       destroyOnHidden
       footer={
         <div style={{ display: 'flex', justifyContent: 'space-between' }}>
@@ -139,8 +139,7 @@ export default function FilterDrawer({
             placeholder={t('inbounds')}
             maxTagCount="responsive"
             allowClear
-            showSearch
-            optionFilterProp="label"
+            showSearch={{ optionFilterProp: 'label' }}
             listHeight={220}
           />
         </Form.Item>
@@ -155,8 +154,7 @@ export default function FilterDrawer({
               placeholder={t('pages.clients.filters.nodes')}
               maxTagCount="responsive"
               allowClear
-              showSearch
-              optionFilterProp="label"
+              showSearch={{ optionFilterProp: 'label' }}
               listHeight={220}
             />
           </Form.Item>
@@ -171,8 +169,7 @@ export default function FilterDrawer({
             placeholder={t('pages.clients.groupPlaceholder')}
             maxTagCount="responsive"
             allowClear
-            showSearch
-            optionFilterProp="label"
+            showSearch={{ optionFilterProp: 'label' }}
             listHeight={220}
           />
         </Form.Item>

frontend/src/pages/hosts/HostFormModal.tsx

@@ -191,8 +191,7 @@ export default function HostFormModal({ open, mode, host, inboundOptions, existi
                       <Select
                         mode="multiple"
                         options={inboundSelectOptions}
-                        showSearch
-                        optionFilterProp="label"
+                        showSearch={{ optionFilterProp: 'label' }}
                         placeholder={t('pages.hosts.selectInbound')}
                       />
                     </FormField>
@@ -211,7 +210,7 @@ export default function HostFormModal({ open, mode, host, inboundOptions, existi
                       <Select mode="tags" allowClear tokenSeparators={[',']} />
                     </FormField>
                     <FormField name="nodeGuids" label={t('pages.hosts.fields.nodeGuids')} tooltip={t('pages.hosts.hints.nodeGuids')}>
-                      <Select mode="multiple" allowClear options={nodeSelectOptions} optionFilterProp="label" />
+                      <Select mode="multiple" allowClear options={nodeSelectOptions} showSearch={{ optionFilterProp: 'label' }} />
                     </FormField>
                     <FormField name="enable" label={t('pages.hosts.fields.enable')} valueProp="checked">
                       <Switch />

frontend/src/pages/inbounds/clients/AttachClientsModal.tsx

@@ -203,7 +203,7 @@ export default function AttachClientsModal({
           onChange={setTargetIds}
           options={targetOptions}
           placeholder={t('pages.inbounds.attachClientsTargets')}
-          optionFilterProp="label"
+          showSearch={{ optionFilterProp: 'label' }}
         />
       )}
     </Modal>

frontend/src/pages/inbounds/clients/AttachExistingClientsModal.tsx

@@ -203,7 +203,7 @@ export default function AttachExistingClientsModal({
                     options={groupOptions}
                     placeholder={t('pages.clients.group')}
                     style={{ minWidth: 160 }}
-                    optionFilterProp="label"
+                    showSearch={{ optionFilterProp: 'label' }}
                   />
                 )}
               </Space>

frontend/src/pages/settings/EmailTab.tsx

@@ -113,8 +113,7 @@ export default function EmailTab({ allSetting, updateSetting }: EmailTabProps) {
                       : <span><b>{stageLabel[testResult.stage || ''] || testResult.stage}:</b> {t('pages.settings.' + testResult.msg)}</span>
                   }
                   showIcon
-                  closable
-                  onClose={() => setTestResult(null)}
+                  closable={{ onClose: () => setTestResult(null) }}
                 />
               )}
             </Space>

frontend/src/pages/settings/TelegramTab.tsx

@@ -233,8 +233,7 @@ export default function TelegramTab({ allSetting, updateSetting }: TelegramTabPr
                   type={testResult.success ? 'success' : 'error'}
                   title={testResult.msg}
                   showIcon
-                  closable
-                  onClose={() => setTestResult(null)}
+                  closable={{ onClose: () => setTestResult(null) }}
                 />
               )}
             </Space>

frontend/src/pages/sub/SubPage.tsx

@@ -286,7 +286,7 @@ export default function SubPage() {
             <Col xs={24} sm={22} md={18} lg={14} xl={12}>
               <Card hoverable className="subscription-card" title={cardTitle} extra={cardExtra}>
                 {announce && (
-                  <Alert type="info" showIcon message={announce} style={{ marginBottom: 16 }} />
+                  <Alert type="info" showIcon title={announce} style={{ marginBottom: 16 }} />
                 )}
                 <Descriptions
                   bordered

frontend/src/pages/sub/SubUsageSummary.tsx

@@ -78,7 +78,7 @@ export default function SubUsageSummary({
           percent={pct}
           showInfo={false}
           strokeColor={{ '0%': stroke.from, '100%': stroke.to }}
-          trailColor="var(--ant-color-fill-secondary)"
+          railColor="var(--ant-color-fill-secondary)"
           strokeWidth={10}
           className="usage-summary-bar"
         />

frontend/src/pages/xray/balancers/BalancerFormModal.tsx

@@ -257,7 +257,7 @@ export default function BalancerFormModal({
             <Alert
               type="info"
               showIcon
-              message={t('pages.xray.balancer.balancerFallbackInfo')}
+              title={t('pages.xray.balancer.balancerFallbackInfo')}
               style={{ marginBottom: 16 }}
             />
           )}
@@ -265,7 +265,7 @@ export default function BalancerFormModal({
             <Alert
               type="error"
               showIcon
-              message={t('pages.xray.balancer.balancerFallbackCycle')}
+              title={t('pages.xray.balancer.balancerFallbackCycle')}
               style={{ marginBottom: 16 }}
             />
           )}

frontend/src/pages/xray/dns/DnsPresetsModal.tsx

@@ -86,7 +86,7 @@ export default function DnsPresetsModal({ open, onClose, onInstall }: DnsPresets
         type="warning"
         showIcon
         className="preset-warning"
-        message={t('pages.xray.dns.dnsLeakWarning')}
+        title={t('pages.xray.dns.dnsLeakWarning')}
       />
       <div className="preset-list">
         {PRESETS.map((preset) => (

frontend/src/pages/xray/dns/DnsTab.tsx

@@ -240,7 +240,7 @@ export default function DnsTab({ templateSettings, setTemplateSettings }: DnsTab
                 <Alert
                   type="warning"
                   showIcon
-                  message={t('pages.xray.dns.dnsLeakWarning')}
+                  title={t('pages.xray.dns.dnsLeakWarning')}
                   style={{ marginBottom: 12 }}
                 />
                 <SettingListItem