feat(amneziawg): add AmneziaWG as an outbound protocol (#6320)

* feat(amneziawg): add AmneziaWG as an outbound protocol

- AmneziaWG outbound protocol end-to-end: config schema, socks bridge, netstack, panel UI
- Route amneziawg outbounds to HTTP probe in TCP mode (backend + frontend classifiers) with pinning test
- Add 2-minute idle read deadline to pumpUDPEgress to reap idle egress sessions
- Require SOCKS5 username/password auth on the egress server (reject NO-AUTH with 0xFF) with test
- Bound the egress TCP tunnel dial with portForwardDialTimeout (10s), matching portfwd.go
- Resolve UDP domain targets off the association's reader loop via deliverUDPDatagram; race-safe getOrDial starts the reply pump at session creation; client passed by value into resolver goroutines (pinned by TestEgressUDPDatagramDomainInterleavedClients)
- Reconcile early-returns on an empty desired set and closes the egress listener; EgressBasePort (64900) is reserved against local inbound port conflicts like the internal API port, with pinning tests for both the port reservation (TestCheckPortConflict_EgressPortBlockedLocal) and the Reconcile empty-desired Close/Listen lifecycle (TestOutboundManagerReconcileEmptyDesiredClosesEgress)
- Eliminate acceptLoop shutdown race by validating listener != nil and registering to tracked under s.mu before wg.Add; bound pre-auth handshake with deadline (pinned by TestEgressServerCloseDuringConcurrentAccepts)
- Support AAAA and dual-stack domain resolution in tunnel DNS resolver with v6 default fallback (DefaultTunnelDNSServerV6); add DNS field to frontend protocol form; avoid unneeded cache flushes on unchanged SetStack ticks

* fix(amneziawg): resolve IPv6-only DNS default fallback and validate required keys

- Default to IPv6 tunnel DNS on IPv6-only outbounds with blank dns
- Require non-empty secretKey and peer publicKey in ValidateAmneziaWGOutbound
- Add end-to-end IPv6 tunnel domain resolution test and test empty key rejection
- Trim comment blocks exceeding 2 lines across modified files
- Fix Storybook test execution on environments with POSIX locale

Co-Authored-By: Claude Code <noreply@anthropic.com>

---------

Co-authored-by: rqzbeh <rqzbeh@users.noreply.github.com>
Co-authored-by: Claude Code <noreply@anthropic.com>
Co-authored-by: Sanaei <ho3ein.sanaei@gmail.com>

internal/web/translation/ru-RU.json

@@ -1857,7 +1857,10 @@
         "randomTrailers": "RandomTrailers",
         "randomTrailersHint": "Добавляет случайные байты в конец каждого пакета. Обе стороны должны поддерживать AmneziaWG 3.1+.",
         "disableCookies": "DisableCookies",
-        "disableCookiesHint": "Не отправлять cookie reply — убирает сигнатуру для DPI, но ослабляет защиту от флуда."
+        "disableCookiesHint": "Не отправлять cookie reply — убирает сигнатуру для DPI, но ослабляет защиту от флуда.",
+        "listenPort": "Listen Port (optional)",
+        "listenPortHint": "Fixed local UDP source port. Leave 0 to pick one automatically.",
+        "outboundObfuscationHint": "Must exactly match the server side parameters."
       },
       "tun": {
         "userLevel": "Уровень пользователя"