refactor(frontend): move form-item hints from extra to tooltip

Switch reality target, node options, and WARP auto-update-IP hints from
inline extra text to label tooltips for a cleaner form layout.

internal/xray/mutation_audit_test.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"slices"
 	"testing"
 	"time"
 
@@ -248,12 +249,7 @@ func TestRefreshLocalOnline_GraceBoundaryInbounds(t *testing.T) {
 }
 
 func containsString(s []string, v string) bool {
-	for _, x := range s {
-		if x == v {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(s, v)
 }
 
 // ---------------------------------------------------------------------------