The WireGuard peer address was allocated server-side and shown read-only
in the client editor, so changing it required hand-editing the inbound's
raw settings JSON (#5715). The backend add/update paths already honored a
submitted allowedIPs; only the form withheld it.
Make the field editable (comma-separated, empty still auto-assigns) and
validate submissions server-side: entries must parse as an IP or CIDR,
bare addresses normalize to single-host prefixes, and an address already
used by another peer on the inbound is rejected.
Closes#5715
defaultWireguardClients always allocated new tunnel addresses from the
hardcoded 10.0.0.0/24 base, so a legacy or migrated inbound whose peers
live in a different subnet (e.g. 172.16.0.0/24) got new clients in an
unrelated, unroutable range. Derive the allocation base from the existing
peers' /24 and fall back to 10.0.0.0/24 only when there are none.
WireGuard inbounds now manage per-client peers using xray-core's native WireGuard users (AddUser/RemoveUser). Each client lives in settings.clients (canonical, like every other protocol) and is projected to peers[] only when emitting the xray config, at level 0 so the dispatcher's per-user traffic/online counters work with no extra plumbing.
Backend: internal/util/wireguard gains KeyToHex (base64 to hex for the gRPC path), PublicKeyFromPrivate and GenerateWireguardPSK; xray/api.go builds a wireguard account in AddUser with hex keys (RemoveUser already worked); client CRUD generates a keypair and allocates a unique tunnel address per client and never rotates keys on edit; an idempotent migration converts legacy settings.peers into managed clients; WireGuard is included in the raw subscription.
Frontend: WireGuard in the add-client modal with keys on the credential tab, client schema, per-client QR/link/.conf, inbound form reduced to server settings; i18n added across 13 locales.
Fix: guard the settings[clients] assertion in add/update so a legacy WireGuard inbound stored without a clients key no longer panics.