feat(hysteria2): emit UDP port hopping in subscriptions and share links

UDP Hop (finalmask.quicParams.udpHop.ports) was configurable but never surfaced in generated configs, so clients kept using the single listening port (#4789).

Share links (frontend genHysteriaLink + sub genHysteriaLink) now keep a numeric port in the authority and carry the hop range as the v2rayN-compatible mport query param, so v2rayN and other System.Uri-based importers can parse the link. Clash output sets mihomos native ports field.

Closes #4789

frontend/src/lib/xray/inbound-link.ts

@@ -626,6 +626,11 @@ export function genHysteriaLink(input: GenHysteriaLinkInput): string {
 
   applyFinalMaskToParams(stream.finalmask, params);
 
+  const hopPorts = stream.finalmask?.quicParams?.udpHop?.ports?.trim() ?? '';
+  if (hopPorts.length > 0) {
+    params.set('mport', hopPorts);
+  }
+
   const url = new URL(`${scheme}://${clientAuth}@${address}:${port}`);
   for (const [key, value] of params) url.searchParams.set(key, value);
   url.hash = encodeURIComponent(remark);

frontend/src/test/inbound-link.test.ts

@@ -131,6 +131,33 @@ describe('genHysteriaLink', () => {
       expect(link).toMatchSnapshot();
     });
   }
+
+  it('emits the UDP hop range as the v2rayN-compatible mport param', () => {
+    const [, raw] = fixtures[0];
+    const withHop = {
+      ...raw,
+      settings: { ...(raw.settings as Record<string, unknown>), version: 2 },
+      streamSettings: {
+        ...(raw.streamSettings as Record<string, unknown>),
+        finalmask: { quicParams: { udpHop: { ports: '20000-50000', interval: '5-10' } } },
+      },
+    };
+    const typed = InboundSchema.parse(withHop);
+    const client = (raw.settings as { clients: Array<{ auth: string }> }).clients[0];
+
+    const link = genHysteriaLink({
+      inbound: typed,
+      address: 'example.test',
+      port: typed.port,
+      remark: 'hop-test',
+      clientAuth: client.auth,
+    });
+
+    expect(link.startsWith('hysteria2://')).toBe(true);
+    expect(link).toContain(`@example.test:${typed.port}`);
+    expect(link).toContain('mport=20000-50000');
+    expect(link.endsWith('#hop-test')).toBe(true);
+  });
 });
 
 describe('genWireguardLink + genWireguardConfig', () => {