ApiProvider misspells cmd.command as cmd.commmand in update checks

[SxxAq]

js/api/ApiProvider.js appears to misspell cmd.command as cmd.commmand in the websocket message handler.

Current code:

update: cmd.commmand == 'window_update'

and

update: cmd.commmand == 'layout_update'

Because of the typo, these checks always evaluate to false, so the update flag passed to downstream handlers is incorrect.

This seems to affect at least:

• window_update
• layout_update

For example, onWindowMessage in js/main.js uses this flag to decide whether to route through updateWindow(cmd) or addPaneBatched(cmd), so this appears to affect runtime behavior rather than just dead code.

Suggested fix: replace cmd.commmand with cmd.command in both locations.