fix: add nil check for AnyResponse in WrapUnary method to prevent caching issues

server/router/api/v1/connect_interceptors.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"log/slog"
+	"reflect"
 	"runtime/debug"
 
 	"connectrpc.com/connect"
@@ -56,7 +57,7 @@ func (*MetadataInterceptor) WrapUnary(next connect.UnaryFunc) connect.UnaryFunc
 
 		// Prevent browser caching of API responses to avoid stale data issues
 		// See: https://github.com/usememos/memos/issues/5470
-		if resp != nil && resp.Header() != nil {
+		if !isNilAnyResponse(resp) && resp.Header() != nil {
 			resp.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 			resp.Header().Set("Pragma", "no-cache")
 			resp.Header().Set("Expires", "0")
@@ -66,6 +67,14 @@ func (*MetadataInterceptor) WrapUnary(next connect.UnaryFunc) connect.UnaryFunc
 	}
 }
 
+func isNilAnyResponse(resp connect.AnyResponse) bool {
+	if resp == nil {
+		return true
+	}
+	val := reflect.ValueOf(resp)
+	return val.Kind() == reflect.Ptr && val.IsNil()
+}
+
 func (*MetadataInterceptor) WrapStreamingClient(next connect.StreamingClientFunc) connect.StreamingClientFunc {
 	return next
 }