fix: Improve dose timestamp formatting and handle placeholder text in UIManager so multiple entries can be retained/saved

src/ui_manager.py

@@ -1033,12 +1033,17 @@ class UIManager:
                     if dose:
                         from datetime import datetime
 
-                        timestamp = datetime.now().strftime("%H:%M")
+                        # Format timestamp for display (12-hour format with AM/PM)
-                        new_dose = f"{timestamp}: {dose}"
+                        timestamp = datetime.now().strftime("%I:%M %p")
+                        new_dose = f"• {timestamp} - {dose}"
 
                         current_doses = dose_var.get()
                         if current_doses and current_doses.strip():
-                            dose_var.set(current_doses + f"\n{new_dose}")
+                            # Check if current content is placeholder text
+                            if "No doses recorded" in current_doses:
+                                dose_var.set(new_dose)
+                            else:
+                                dose_var.set(current_doses + f"\n{new_dose}")
                         else:
                             dose_var.set(new_dose)