Test All only iterated the editable template outbounds, so subscription
outbounds (the read-only "from subscriptions" table) were never probed in
bulk. They are now queued too, keyed by tag in subscriptionTestStates so
their rows light up live; the template and subscription HTTP lanes run
serially to respect the backend's single-batch lock (TCP runs alongside).
Also stop testing freedom ("direct") and dns outbounds: they aren't
proxies, so an HTTP probe through them only measures the host's own
reachability, not a tunnel. They are now untestable in every mode -- the
per-row button is disabled and Test All skips them -- with a matching
backend guard so a direct API caller can't HTTP-test them either.
Replace the per-outbound burstObservatory polling (one temp xray spawn +
up to 15s of /debug/vars polling per outbound, serialised) with one
shared temp xray instance per batch: every tested outbound gets its own
loopback SOCKS inbound plus an inboundTag->outboundTag routing rule, and
the panel times a real HTTP request through each one in parallel. The
probe returns as soon as the response lands and records the HTTP status
plus an httptrace breakdown (proxy connect / TLS via outbound / first
byte) shown in the result popover.
New POST /panel/api/xray/testOutbounds endpoint (array in, results in
input order, max 50); the legacy /testOutbound endpoint now delegates to
the same engine. Test All chunks HTTP probes 16 per request, and a batch
whose shared process never comes up (one structurally-broken outbound
poisons the config) retries each item in an isolated instance so the
broken outbound reports xray's real error while the rest still test.
MHSanaei