Issue #1 - Add ability to remove profile picture

[zenocross]

Description

Users can set a profile picture but cannot remove it once uploaded. There's no option to revert to the default state.

Current Behavior

• Profile picture can be uploaded
• No option to remove or delete it
• Can only replace with a different image

Expected Behavior

Add a "Remove Profile Picture" button that allows users to delete their current profile picture and revert to the default avatar.

Steps to Reproduce

1. Go to account settings
2. Upload a profile picture
3. Try to find a removal option
4. No such option exists

Proposed Solution

Add a "Remove" or "Delete" button next to the profile picture upload section that clears the current image and restores the default state.

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