feat(inbounds): support Unix domain socket path in Listen field (#4429)

UDS listen already worked for proxying (the listen string is passed to xray verbatim and port 0 is accepted), and the Go sub/link layer already ignores the bind listen. The only gap was the frontend resolveAddr, which would put a socket-path listen into share/sub links (e.g. vless://uuid@/run/xray/x.sock:0). resolveAddr now treats a path-style listen (starting with / or @) as having no client-reachable address and falls back to hostOverride/hostname. Adds a test and a Listen-field help hint across all locales.

database/db_seed_test.go

@@ -133,7 +133,7 @@ func TestNormalizeInboundClientSubId_FillsMissingAndPreservesExisting(t *testing
 	}
 
 	subIdPattern := regexp.MustCompile(`^[0-9a-z]{16}$`)
-	for i := 0; i < 2; i++ {
+	for i := range 2 {
 		obj := clients[i].(map[string]any)
 		sub, _ := obj["subId"].(string)
 		if !subIdPattern.MatchString(sub) {