Fix hotkey execution reliability on Windows

- Add interval parameter (50ms) between key presses in pyautogui.hotkey()
- Add small delay before hotkey execution for better Windows compatibility
- Add defensive check to handle keys stored as string instead of list

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

macro_manager.py

@@ -302,7 +302,12 @@ class MacroManager:
             # Press key combination
             keys = cmd.get("keys", [])
             if keys:
-                pyautogui.hotkey(*keys)
+                # Ensure keys is a list, not a string
+                if isinstance(keys, str):
+                    keys = [k.strip().lower() for k in keys.split(",")]
+                # Small delay before hotkey for reliability on Windows
+                time.sleep(0.05)
+                pyautogui.hotkey(*keys, interval=0.05)
 
         elif cmd_type == "wait":
             # Delay in milliseconds