fix(xray): test UDP outbounds via xray probe (#4657) + Vision testseed & Flow form fixes

Outbound connection tester (#4657): UDP-based outbounds (wireguard,
hysteria, kcp/quic transports) were probed with a raw UDP dial that
treated the inevitable read timeout as success, so every one reported a
fake ~5s 'alive'. Route them through the authoritative xray
burstObservatory probe and drop the broken raw-UDP path. Test All now
runs a parallel TCP lane and a serial HTTP lane so xray-probe outbounds
don't collide on the test semaphore.

Vision testseed: the [900, 500, 900, 256] default repeats 900, and a
tags Select keys each tag by value -> 'two children with the same key,
900'. Render it as four InputNumbers (inbound + outbound forms); the
field is a fixed 4-tuple where repeats are valid.

Inbound form: drop the null-valued 'Local Panel' Select option (AntD
rejects null option values; placeholder + allowClear already cover it).

Outbound form: add an explicit 'None' option to the Flow selector.

frontend/src/pages/inbounds/InboundFormModal.tsx

@@ -931,14 +931,11 @@ export default function InboundFormModal({
             disabled={mode === 'edit'}
             placeholder={t('pages.inbounds.localPanel')}
             allowClear
-            options={[
-              { value: null, label: t('pages.inbounds.localPanel') },
-              ...selectableNodes.map((n) => ({
-                value: n.id,
-                label: `${n.name}${n.status === 'offline' ? ' (offline)' : ''}`,
-                disabled: n.status === 'offline',
-              })),
-            ]}
+            options={selectableNodes.map((n) => ({
+              value: n.id,
+              label: `${n.name}${n.status === 'offline' ? ' (offline)' : ''}`,
+              disabled: n.status === 'offline',
+            }))}
           />
         </Form.Item>
       )}
@@ -1498,16 +1495,15 @@ export default function InboundFormModal({
           {network === 'tcp' && (security === 'tls' || security === 'reality') && (
             <Form.Item
               label={t('pages.inbounds.form.visionTestseed')}
-              name={['settings', 'testseed']}
-              initialValue={[900, 500, 900, 256]}
-              normalize={(v: unknown) =>
-                Array.isArray(v)
-                  ? v.map((x) => Number(x)).filter((n) => Number.isInteger(n) && n > 0)
-                  : []
-              }
               extra="Applies only to clients using the xtls-rprx-vision flow; ignored otherwise."
             >
-              <Select mode="tags" tokenSeparators={[',', ' ']} placeholder="four positive integers" />
+              <Space.Compact block>
+                {[900, 500, 900, 256].map((def, i) => (
+                  <Form.Item key={i} name={['settings', 'testseed', i]} noStyle initialValue={def}>
+                    <InputNumber min={1} style={{ width: '25%' }} />
+                  </Form.Item>
+                ))}
+              </Space.Compact>
             </Form.Item>
           )}
         </>

frontend/src/pages/xray/OutboundFormModal.tsx

@@ -191,8 +191,8 @@ export default function OutboundFormModal({
   const [linkInput, setLinkInput] = useState('');
 
   // Parse a share link (vmess:// / vless:// / trojan:// / ss:// /
-  // hysteria2://) and replace form state with the result. The current
-  // tag is preserved when the parsed link doesn't carry one.
+  // hysteria2:// / wireguard://) and replace form state with the result.
+  // The current tag is preserved when the parsed link doesn't carry one.
   function importLink() {
     const link = linkInput.trim();
     if (!link) return;
@@ -1743,7 +1743,7 @@ export default function OutboundFormModal({
                         <Select
                           allowClear
                           placeholder={t('none')}
-                          options={FLOW_OPTIONS}
+                          options={[{ value: '', label: t('none') }, ...FLOW_OPTIONS]}
                         />
                       </Form.Item>
                     )}
@@ -1762,22 +1762,14 @@ export default function OutboundFormModal({
                             <Form.Item label={t('pages.xray.outboundForm.visionTestpre')} name={['settings', 'testpre']}>
                               <InputNumber min={0} style={{ width: '100%' }} />
                             </Form.Item>
-                            <Form.Item
-                              label={t('pages.inbounds.form.visionTestseed')}
-                              name={['settings', 'testseed']}
-                              normalize={(v: unknown) =>
-                                Array.isArray(v)
-                                  ? v
-                                    .map((x) => Number(x))
-                                    .filter((n) => Number.isInteger(n) && n > 0)
-                                  : []
-                              }
-                            >
-                              <Select
-                                mode="tags"
-                                tokenSeparators={[',', ' ']}
-                                placeholder="four positive integers"
-                              />
+                            <Form.Item label={t('pages.inbounds.form.visionTestseed')}>
+                              <Space.Compact block>
+                                {[900, 500, 900, 256].map((def, i) => (
+                                  <Form.Item key={i} name={['settings', 'testseed', i]} noStyle initialValue={def}>
+                                    <InputNumber min={1} style={{ width: '25%' }} />
+                                  </Form.Item>
+                                ))}
+                              </Space.Compact>
                             </Form.Item>
                           </>
                         );
@@ -2215,7 +2207,7 @@ export default function OutboundFormModal({
                   <Space orientation="vertical" size={10} style={{ width: '100%', marginTop: 10 }}>
                     <Input.Search
                       value={linkInput}
-                      placeholder="vmess:// vless:// trojan:// ss:// hysteria2://"
+                      placeholder="vmess:// vless:// trojan:// ss:// hysteria2:// wireguard://"
                       enterButton="Import"
                       onChange={(e) => setLinkInput(e.target.value)}
                       onSearch={importLink}

frontend/src/pages/xray/OutboundsTab.tsx

@@ -36,6 +36,7 @@ import type { ColumnsType } from 'antd/es/table';
 import { SizeFormatter } from '@/utils';
 import { OutboundProtocols as Protocols } from '@/schemas/primitives';
 import OutboundFormModal from './OutboundFormModal';
+import { isUdpOutbound } from '@/hooks/useXraySetting';
 import type { XraySettingsValue, SetTemplate, OutboundTestState, OutboundTrafficRow } from '@/hooks/useXraySetting';
 import './OutboundsTab.css';
 
@@ -361,7 +362,7 @@ export default function OutboundsTab({
         align: 'center',
         width: 80,
         render: (_v, record, index) => (
-          <Tooltip title={`${t('check')} (${testMode.toUpperCase()})`}>
+          <Tooltip title={`${t('check')} (${(isUdpOutbound(record) ? 'http' : testMode).toUpperCase()})`}>
             <Button
               type="primary"
               shape="circle"