Change readline hack logic for async dbg msg to be ready for readline 8.3

CHANGELOG.md

@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+- Changed readline hack logic for async dbg msg to be ready for readline 8.3 (@doegox)
+- Improved To avoid conflicts with ModemManager on Linux, is recommended to masking the service (@grugnoymeme)
 - Changed `data crypto` - now also handles AES-256 (@iceman1001)
 - Changed `hf mfdes info` - add recognition of Swissbit iShield Key Mifare (@ah01)
 - Changed `hf mf info` - add detection for unknown backdoor keys and for some backdoor variants (@doegox)
@@ -18,7 +20,6 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 - Changed `mem load` - now handles UL-C and UL-AES dictionary files (@iceman1001)
 - Changed `hf mfu sim` - now support UL-C simulation (@iceman1001)
 - Added `!` - run system commands from inside the client. Potentially dangerous if running client as SUDO, SU, ROOT (@iceman1001)
-- Improved To avoid conflicts with ModemManager on Linux, is recommended to masking the service (@grugnoymeme)
 
 ## [Daddy Iceman.4.20469][2025-06-16]
 - Fixed edge case in fm11rf08s key recovery tools (@doegox)

client/src/ui.c

@@ -424,18 +424,13 @@ static void fPrintAndLog(FILE *stream, const char *fmt, ...) {
 #ifdef RL_STATE_READCMD
     // We are using GNU readline. libedit (OSX) doesn't support this flag.
     int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
-    char *saved_line;
-    int saved_point;
+    char *saved_line = NULL;
 
     if (need_hack) {
-        saved_point = rl_point;
         saved_line = rl_copy_text(0, rl_end);
-        rl_save_prompt();
-        rl_replace_line("", 0);
-        rl_redisplay();
+        rl_clear_visible_line();
     }
 #endif
-
     va_start(argptr, fmt);
     vsnprintf(buffer, sizeof(buffer), fmt, argptr);
     va_end(argptr);
@@ -453,14 +448,13 @@ static void fPrintAndLog(FILE *stream, const char *fmt, ...) {
         if (linefeed) {
             fprintf(stream, "\n");
         }
+        fflush(stream);
     }
 
 #ifdef RL_STATE_READCMD
-    // We are using GNU readline. libedit (OSX) doesn't support this flag.
     if (need_hack) {
-        rl_restore_prompt();
+        rl_on_new_line();
         rl_replace_line(saved_line, 0);
-        rl_point = saved_point;
         rl_redisplay();
         free(saved_line);
     }