Bump minimum eligible Xray version

Update Xray release filtering to only include versions at or above v26.6.27 (previously v26.4.25). Also mark `google.golang.org/protobuf` as a direct dependency in `go.mod` by removing the `// indirect` annotation.

go.mod

@@ -109,7 +109,7 @@ require (
 	golang.zx2c4.com/wireguard v0.0.0-20260522210424-ecfc5a8d5446 // indirect
 	golang.zx2c4.com/wireguard/windows v1.0.1 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260622175928-b703f567277d // indirect
-	google.golang.org/protobuf v1.36.11 // indirect
+	google.golang.org/protobuf v1.36.11
 	gvisor.dev/gvisor v0.0.0-20260122175437-89a5d21be8f0 // indirect
 	lukechampine.com/blake3 v1.4.1 // indirect
 )

internal/web/service/server.go

@@ -825,7 +825,7 @@ func (s *ServerService) GetXrayVersions() ([]string, error) {
 			continue
 		}
 
-		if major > 26 || (major == 26 && minor > 4) || (major == 26 && minor == 4 && patch >= 25) {
+		if major > 26 || (major == 26 && minor > 6) || (major == 26 && minor == 6 && patch >= 27) {
 			versions = append(versions, release.TagName)
 		}
 	}