fix(routing): write lowercase L4 network to xray config, display uppercase in UI

frontend/src/pages/xray/routing/RuleFormModal.tsx

@@ -55,7 +55,7 @@ const initialForm = (): FormState => ({
   balancerTag: '',
 });
 
-const NETWORKS = ['', 'TCP', 'UDP', 'TCP,UDP'];
+const NETWORKS = ['', 'tcp', 'udp', 'tcp,udp'];
 const PROTOCOLS = ['http', 'tls', 'bittorrent', 'quic'];
 
 function csv(value: string): string[] {

frontend/src/pages/xray/routing/helpers.ts

@@ -83,7 +83,7 @@ export function ruleCriteriaChips(rule: RuleRow) {
   if (rule.port) chips.push({ label: 'Port', value: rule.port });
   if (rule.sourceIP) chips.push({ label: 'Src IP', value: rule.sourceIP });
   if (rule.sourcePort) chips.push({ label: 'Src Port', value: rule.sourcePort });
-  if (rule.network) chips.push({ label: 'L4', value: rule.network });
+  if (rule.network) chips.push({ label: 'L4', value: rule.network.toUpperCase() });
   if (rule.protocol) chips.push({ label: 'Protocol', value: rule.protocol });
   if (rule.user) chips.push({ label: 'User', value: rule.user });
   if (rule.vlessRoute) chips.push({ label: 'VLESS', value: rule.vlessRoute });

frontend/src/pages/xray/routing/useRoutingColumns.tsx

@@ -133,7 +133,7 @@ export function useRoutingColumns({
         key: 'network',
         render: (_v, record) => (
           <div className="criterion-flow">
-            {record.network && <CriterionRow label="L4" value={record.network} title={`L4: ${record.network}`} />}
+            {record.network && <CriterionRow label="L4" value={record.network.toUpperCase()} title={`L4: ${record.network.toUpperCase()}`} />}
             {record.protocol && <CriterionRow label="Protocol" value={record.protocol} title={`Protocol: ${record.protocol}`} />}
             {record.attrs && <CriterionRow label="Attrs" value={record.attrs} title={`Attrs: ${record.attrs}`} />}
             {!record.network && !record.protocol && !record.attrs && <span className="criterion-empty">—</span>}