fix(tuic): client speed display and certificate button layout (#6723)

* fix(tuic): restore client speed and certificate layout

* docs(tuic): clarify native runtime and protocol behavior

* fix(websocket): preserve traffic updates from independent sources

* fix(docs): sync websocket traffic schema and drop restating TUIC tests

docs/public/openapi.json still described the old traffic event, without
clientTrafficSource/clientTrafficIntervalMs or the TUIC oneOf branch, so
the docs site showed a payload the panel no longer sends. No check
covers that copy.

The TUIC certificate layout test and the TUIC speed payload test only
read back the literals the code writes, so neither could fail on a real
regression. Both are removed, along with the className that existed only
for the layout test.

---------

Co-authored-by: MHSanaei <ho3ein.sanaei@gmail.com>

README.md

@@ -29,7 +29,7 @@ Built as an enhanced fork of the original X-UI project, 3X-UI adds broader proto
 - **Multi-protocol inbounds** — VLESS, VMess, Trojan, Shadowsocks, WireGuard, AmneziaWG, TUIC v5, Hysteria2, MTProto, HTTP, SOCKS (Mixed), Dokodemo-door / Tunnel, and TUN.
 - **Modern transports & security** — TCP (Raw), mKCP, WebSocket, gRPC, HTTPUpgrade, and XHTTP, secured with TLS, XTLS, and REALITY.
 - **AmneziaWG built in** — DPI-resistant WireGuard runs inside the panel on a userspace network stack, with no kernel module, DKMS, or extra packages to install.
-- **TUIC v5 sidecar** — High-performance QUIC-based proxy with native UDP relay traffic metering, 0-RTT handshakes, and BBR congestion control.
+- **Native TUIC v5 server** — In-process Go QUIC server with Xray routing and per-client traffic accounting; BBR and New Reno are available server-side. CUBIC is preserved in the client profile but currently falls back to New Reno on the server.
 - **MTProto proxies** — per-client FakeTLS secrets, ad-tags, and quotas, applied live without dropping existing connections.
 - **Fallbacks** — serve multiple protocols on a single port (e.g. VLESS and Trojan on 443) using Xray's fallback support.
 - **Per-client management** — traffic quotas, expiry dates, IP limits with trusted-address exemptions, HWID device limits, scheduled renewal cycles, live online status, and one-click share links, QR codes, and subscriptions.