fix: screen switch now works well with the shell and its "history"

src/terminal/put.c

@@ -1,5 +1,6 @@
 #include "ctype.h"
 #include "kprintf.h"
+#include "shell.h"
 #include "string.h"
 #include "sys/io.h"
 #include "terminal.h"
@@ -44,6 +45,8 @@ void terminal_set_screen(int pos)
 	screen = &screens[pos];
 	memcpy(TERM_BUF, screen->buffer, sizeof(screen->buffer));
 	update_cursor();
+	if (TERM_BUF[0] == vga_entry(' ', VGA_COLOR_WHITE))
+		kprintf(0, PROMPT);
 }
 
 void terminal_setcolor(uint8_t color)