fix(soundboard): read MANAGE_SPACE from the space bitfield

The add-sound control was gated on channelPermissions, which carries the
per-channel bitfield; MANAGE_SPACE lives in the space-level one. The check
silently evaluated false for everybody, including owners, so the button never
rendered and there was no way to add a sound at all.

Also raise the clip cap to 2 MB — a 30-second clip at a high bitrate cleared
1 MB — and stop reporting every upload failure as 'too large', which sent
people to shrink a file that was not the problem.

packages/web/src/i18n/locales/en.ts

@@ -41,7 +41,8 @@ export const en = {
   'soundboard.remove': 'Remove',
   'soundboard.namePrompt': 'Name for this sound',
   'soundboard.joinFirst': 'Join a voice channel to use the soundboard.',
-  'soundboard.tooLarge': 'Sound must be under 1 MB and a few seconds long.',
+  'soundboard.tooLarge': 'Sound must be under 2 MB and a few seconds long.',
+  'soundboard.uploadFailed': 'Could not upload that file. Try a different one.',
 
   // Account menu (own name in the user bar)
   'accountMenu.editProfile': 'Edit Profile',