feat(xray): update xray-core to v26.9.30 and adapt panel

Bump xtls/xray-core to b26a91de4f (v26.9.30) and the three binary pins
(DockerInit.sh, release.yml Linux + Windows) in lockstep. No deleted
symbols; the sing and sing-shadowsocks indirect deps drop out with the
SS2022 rewrite.

XDNS finalmask (#6718) replaced its string lists with objects: domains
are {name, types, edns0, lenLimit, labelLimit} and client resolvers
{type, settings.addr}. The loader no longer parses the old lists, so a
single stored xdns mask keeps the whole core from starting. The new leaf
package internal/util/maskcompat converts them: "name[:type]" becomes a
domain and "name[:type]+udp://addr" a domain plus a udp resolver. A bare
name maps to TXT, the type legacy clients queried by default, and each
converted domain keeps the 1232-byte EDNS0 the old code always used
(without it the server caps answers at 512). It runs from:
- the XdnsFinalmaskObjectsFix seeder, over inbound streams, hosts, the
  xray template, the global sub-JSON mask and cached subscription
  outbounds;
- inbound save (normalizeStreamSettings) and GetXrayConfig, for rows
  that never went through the seeder;
- both link importers, since fm= from an older panel carries the lists.
The finalmask form edits the object shape (every key needs a registered
field, or the finalmask watch drops it on save) and lifts legacy masks
on open. The udp-mask golden fixture moves to the object shape, which
TestGoldenStreamFixturesBuildInXray now builds through the core. The
wire format changed as well, so pre-upgrade clients need the new core.

WireGuard outbound (#6771) dropped settings.domainStrategy and the
remoteDNS "local" mode. The endpoint lookup now follows
sockopt.domainStrategy and in-tunnel targets the outbound's
targetStrategy. The old key is silently ignored, which undid the
IPv4-first endpoint lookup the WARP outbound depends on (#5205), and
"local" now panics the core at startup because remoteDNS goes through
netip.MustParseAddr. The WireguardDomainStrategyFix seeder moves a stored
family preference to both keys (a value already set wins) and turns
"local" into targetStrategy; the outbound form lifts legacy rows the same
way and drops its select, the WARP modal writes the new placement, and
the inbound form loses a field the server never read.
ValidateOutboundConfig now refuses a non-IP remoteDNS entry, which
conf.Build() lets through, on template save and for outbound
subscriptions.

Noise finalmask items accept type "exp" (#6862), a tag expression. The
form offers it for noise items only: header-custom items go through the
core's PraseByteSlice, which refuses it.

TUN gained autoSystemDnsToGateway (Linux) and autoSystemWfpBlockLeak
(Windows). Both pass through the settings schema so a value set in JSON
survives the next form save.

MASQUE (inbound, outbound, transport) and the XDRIVE transport are new
protocols the panel does not offer yet; their new loader refusals only
cover configs the panel never generates. The FakeDNS IPv6 pool default,
the SS2022 rewrite (same gRPC account; emails are now deduped
case-insensitively, as the panel already does), the restored udphop
interval default and the rest change no panel-facing config.

frontend/src/test/outbound-link-parser.test.ts

@@ -224,6 +224,26 @@ describe('parseVlessLink — XHTTP advanced fields', () => {
 });
 
 describe('parseVlessLink', () => {
+  // A panel older than xray-core 26.9.30 shares xdns in the string lists the core no
+  // longer parses, so an outbound imported verbatim would fail the whole config.
+  it('upgrades a legacy xdns fm= mask to the object shape', () => {
+    const fm = encodeURIComponent(
+      JSON.stringify({
+        udp: [{ type: 'xdns', settings: { resolvers: ['t.example.com+udp://8.8.8.8:53'] } }],
+      }),
+    );
+    const out = parseVlessLink(
+      `vless://11111111-2222-4333-8444-555555555555@srv:53?type=kcp&security=none&fm=${fm}#dns`,
+    );
+    const finalmask = (out!.streamSettings as Record<string, unknown>).finalmask as {
+      udp: Array<{ settings: unknown }>;
+    };
+    expect(finalmask.udp[0].settings).toEqual({
+      domains: [{ name: 't.example.com', types: [16], edns0: 1232 }],
+      resolvers: [{ type: 'udp', settings: { addr: '8.8.8.8:53' } }],
+    });
+  });
+
   it('parses a vless:// link with reality', () => {
     const link =
       'vless://11111111-2222-4333-8444-555555555555@srv.example:443' +