Wait for ttfx before closing its terminal (#6773)

bin/omarchy-system-lock

@@ -21,4 +21,6 @@ fi
 
 # Avoid running screensaver when locked
 pkill -x ttfx 2>/dev/null || true
+# ttfx handles SIGTERM asynchronously, so keep its terminal alive until it exits.
+timeout 1s pidwait -x ttfx 2>/dev/null || true
 pkill -f '[o]rg.omarchy.screensaver' 2>/dev/null || true