Implement server-wide open group user bans and unbans.

[Bilb]

PR made from https://codeberg.org/gravel/session-desktop

The PR has been cleaned and has server-wide features blocked behind a feature flag.

This needs those strings to be added to crowdin.

  serverUnbanUser: 'Unban User from Server',
  globalUserUnbanFailed: 'Unban failed! Are you a global admin/mod?',
  serverBanUser: 'Ban User from Server',
  serverBanUserAndDeleteAll: 'Ban from Server and Delete All',
  addUploadPermission: 'Allow sending attachments',
  clearUploadPermission: 'Remove attachment exception',
  userPermissionsChanged: 'Changed user permissions successfully',
  failedToChangeUserPermissions: 'Failed to change user permissions',
  globalUserBanFailed: 'Ban failed! Are you a global admin/mod?',
  communityChangePermissions: 'Edit Permissions',
  communityPermissionAccessDescription: 'Anyone can see the room (+a)',
  communityPermissionAccessEnable: 'Enable room visibility',
  communityPermissionReadDescription: 'Anyone can read messages (+r)',
  communityPermissionReadEnable: 'Enable reading',
  communityPermissionUploadDescription: 'Anyone can upload files (+u)',
  communityPermissionUploadEnable: 'Enable uploads',
  communityPermissionWriteDescription: 'Anyone can send messages (+w)',
  communityPermissionWriteEnable: 'Enable writing',
  communityChangePermissionsDescription: 'For compatibility reasons, we don\'t know which permissions were enabled to begin with, but you can set new values below regardless.',

For server wide deletions, we need to check the capabilities of the sogs
session-foundation/session-pysogs@fd231f8

My fork is somewhat documented at https://sessioncommunities.online/handbook/#additional-moderator-tools:

• (message right click menu) The Allow sending attachments and Remove attachment exception options allow moderators to grant or revoke upload permissions for regular users.
• (message/room nav right click menu) The Ban User from Server and Unban User from Server options allow global moderators to ban a user from all Communities on a given server.
• (conversation options) The Edit Permissions submenu allows admins to set default permissions for a given Community.

My fork can set +u and =u on users, ban/unban users server-wide, and set +/-rwua on rooms.¹

It's not easy to merge, but the first one (upload permission) would be a priority.²

My implementation has issues:

• Both options (+u and =u) are visible at the same time.
• Users without +u can still attempt to upload (upstream issue).

These are fixable, but I don't have the in-depth knowledge. Namely:

• Clients don't track user permissions.
• Clients will let users upload the rooms regardless of permission.
• No code path for replying to media messages without +u (thumbnail reupload).

For my fork, I had to write custom CI code for Woodpecker.
I would appreciate help with building my fork for Windows
... You could try mirroring it to GitHub and see if it builds.

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Notes for global bans and room permission editing:

• All of +rwua options are on by default when editing room permissions.
• Non-global admins see global ban buttons.
• Have to roll your own SOGS If you need "server ban and delete all".
• I use some legacy UI code.

And the issues to fix before merging these:

• Clients do fetch, but don't track room permissions.
• Clients do fetch, but don't track self global mod status.
• "Ban from Server and Delete All" is only supported on the dev branch of pysogs. Also, needs a marker in 'capabilities'.
• My room permission submenu would need new UI code.

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¹ Fork features: https://sessioncommunities.online/handbook/#additional-moderator-tools
² Upload permission support is lacking. Global bans are used just by a few people and admins use special commands for +w/-w; see https://codeberg.org/gravel/pysogs-sql-triggers.