[Generated By Dashwave AI] Align Message Content Deletion Experience with Web App

[dashwave]

This PR aligns the message content deletion experience with the web app. Key changes include:

1. ComposeBox.js: Added an if condition to check if the compose box is in 'isEditing' mode. If not, a 'message-empty' error is added as a validation error. If in 'isEditing', the error is not added, allowing users to edit messages with empty content.

2. ChatScreen.js: Removed the condition checking for empty content (content == "") to allow empty content to be accepted as input when editing messages.

3. index.js: Commented out the buttons.push(deleteMessage) for conditions where message.isOutbox === true and message.sender_id === ownUser.user_id && messageNotDeleted(message) to refine actionsheets. Added a condition (ownUser.role === 200 && messageNotDeleted(message)) to allow admins to delete messages, using 'ownUser.role' instead of 'ownUser.isAdmin' as the latter is not readable.

These changes ensure a consistent and intuitive message editing and deletion experience across platforms, particularly for admin roles.

[dashwave]

Build Status	❌ Failed
Build Time	-
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