Fix stale cmd/ scripts, export LoginWithChromedp, clean up vet warnings

Update 5 cmd/ test utilities that referenced APIs that drifted after
bridge refactors (NewBrowserAuthManager, bridge.NewConfig, changed
function signatures). Rewrite test-kosmi and test-native to use
NewGraphQLWSClient directly. Export LoginWithChromedp for use by cmd
scripts. Fix redundant-newline vet warnings across 5 cmd/ files.
Remove unreachable code and replace deprecated ioutil calls in
bridge/helper/lottie_convert.go.

Made-with: Cursor

cmd/test-browser-auth/main.go

@@ -1,8 +1,11 @@
 package main
 
 import (
+	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"os"
+	"strings"
 
 	bkosmi "github.com/42wim/matterbridge/bridge/kosmi"
 	"github.com/sirupsen/logrus"
@@ -23,7 +26,6 @@ func main() {
 	email := os.Args[1]
 	password := os.Args[2]
 
-	// Set up logging
 	log := logrus.New()
 	log.SetLevel(logrus.DebugLevel)
 	entry := logrus.NewEntry(log)
@@ -31,11 +33,7 @@ func main() {
 	fmt.Println("🚀 Testing browser-based authentication...")
 	fmt.Println()
 
-	// Create browser auth manager
-	browserAuth := bkosmi.NewBrowserAuthManager(email, password, entry)
-
-	// Get token
-	token, err := browserAuth.GetToken()
+	token, err := bkosmi.LoginWithChromedp(email, password, entry)
 	if err != nil {
 		fmt.Printf("❌ Authentication failed: %v\n", err)
 		os.Exit(1)
@@ -48,27 +46,32 @@ func main() {
 	fmt.Printf("Token length: %d characters\n", len(token))
 	fmt.Println()
 
-	// Check if authenticated
-	if browserAuth.IsAuthenticated() {
-		fmt.Println("✅ Token is valid")
-	} else {
-		fmt.Println("❌ Token is invalid or expired")
-	}
-
-	// Get user ID
-	userID := browserAuth.GetUserID()
+	userID := extractUserIDFromJWT(token)
 	if userID != "" {
 		fmt.Printf("User ID: %s\n", userID)
+	} else {
+		fmt.Println("(Could not extract user ID from token)")
 	}
 
 	fmt.Println()
 	fmt.Println("🎉 Test completed successfully!")
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
+func extractUserIDFromJWT(token string) string {
+	parts := strings.Split(token, ".")
+	if len(parts) != 3 {
+		return ""
 	}
-	return b
+	payload, err := base64.RawURLEncoding.DecodeString(parts[1])
+	if err != nil {
+		return ""
+	}
+	var claims map[string]interface{}
+	if err := json.Unmarshal(payload, &claims); err != nil {
+		return ""
+	}
+	if sub, ok := claims["sub"].(string); ok {
+		return sub
+	}
+	return ""
 }
-