some cz unicode in 5x7

Core/Src/app_gui.c

@@ -15,6 +15,7 @@
 #include "ufb/fb_text.h"
 #include "ufb/fb_7seg.h"
 #include "app_safety.h"
+#include "ufb/utf8.h"
 
 #define MAX_TEMP 400
 
@@ -228,8 +229,10 @@ static void input_sound_effect()
 // ------------- home screen ----------------
 
 static const char* main_menu_opts[] = {
-    "Manual mode",
-    "Calibration",
+    "Ruční režim",
+    "Kalibrace",
+    "Programy",
+    "Diagnostika",
     NULL
 };
 
@@ -308,8 +311,8 @@ static void screen_manual(GuiEvent event)
 // ---------------------------
 
 static const char* manual_menu_opts[] = {
-        "Close menu",
-        "Exit manual",
+        "Zrušit",
+        "Hlavní menu",
         NULL
 };
 
@@ -357,7 +360,7 @@ static void screen_menu(GuiEvent event, const char **options, menu_callback_t cb
         case GUI_EVENT_SCREEN_TICK:
             // long text sliding animation
             if (tickNow - menu->change_time >= pdMS_TO_TICKS(500)) {
-                const uint32_t textlen = strlen(options[menu->pos]) * 6;
+                const uint32_t textlen = utf8_strlen(options[menu->pos]) * 6;
                 if (textlen >= FBW - 2) {
                     if (textlen - menu->text_slide > FBW - 1) {
                         menu->text_slide += 1;