Suppress embeds from original message after successful video download

[Claude]

When the bot successfully downloads and replies with a video, the original message's auto-generated embed (from Discord's URL preview) remains visible, creating redundant content. This PR adds automatic embed suppression to clean up the channel after successful downloads.

Changes

• Permission check: Added _can_manage_messages() helper to verify bot has manage_messages permission
• Embed suppression: Call message.edit(suppress=True) after successful video replies (both direct upload and catbox.moe fallback)
• Error handling: Gracefully ignore suppression failures (missing permissions, already suppressed, etc.)

Implementation

await message.reply(
    content=f"Downloaded from {platform.title()}:",
    file=discord.File(file_path)
)
# Remove the original URL embed if bot has permission
if self._can_manage_messages(message.channel):
    try:
        await message.edit(suppress=True)
    except discord.HTTPException:
        pass

Requires the bot to have manage_messages permission in the channel. Suppression is only attempted after a successful download reply, and failures are silently ignored to avoid disrupting the primary download functionality.

[psykzz]

@copilot extract this into a "remove_embed" function to avoid repetition.

[Copilot]

Extracted into _remove_embed(message) in 59bbd92. Both the direct upload and catbox fallback paths now call this single helper instead of duplicating the permission check + message.edit(suppress=True) logic.

[psykzz]

@copilot fix tests - also make it a requirement for every PR going forward, all tests and status checks must pass.

[Copilot]

@copilot fix tests - also make it a requirement for every PR going forward, all tests and status checks must pass.

Fixed in 0c900ad. The test_process_guild_messages_when_enabled test was failing because MockGuildChannel lacked permissions_for() (needed by _can_manage_messages) and MockMessage lacked edit() (needed by _remove_embed). Added MockPermissions, permissions_for() to MockGuildChannel, and edit() to MockMessage. All 99 tests now pass.