Historical Messages Should Reflect Updated User Avatars

Currently, when a user updates their profile picture, the new avatar is shown correctly on the Dashboard and on newly sent messages. However, all previously sent messages continue to display the old avatar, because the avatar URL stored in historical message objects is not refreshed after the update.

We request a feature that ensures historical messages automatically use the latest avatar of the user, instead of relying on the avatar value stored at message-creation time.

This will ensure visual consistency across the chat history and prevent outdated profile images from appearing in older messages.