Id/fix os file dragging

[isaacdonnelson]

Added File Path Sanitization for .png Files and Vuex Direct Mutation Fix

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

The current code doesn't properly handle .png file paths with query parameters (ending with '?')

Issue Number: N/A

What is the new behavior?

• Sanitizes .png file paths by removing trailing '?' characters before processing
• Prevents direct mutation of Vuex state by using proper mutations
• Creates a copy of the item object to avoid modifying the original directly
• Maintains Electron drag functionality while improving state management

Does this introduce a breaking change?

• Yes
• No

This change maintains the existing functionality while improving code quality and state management, so it's not a breaking change.

Does this introduce UI changes? If so, have they been tested on both dark and light modes?

• Yes
• No

This is a backend logic change and doesn't affect the UI directly.