Allow hiding the mode indicator and hint text on the display line independently

Currently the CLI displays a line below the input box (or below the status line) showing the current mode along with the hint text "(shift+tab to cycle) · ← for agents".

For users who already surface the current permission mode in a custom statusLine script the mode display is redundant. And while the hints are useful for new users, they can become obtrusive once the shortcuts are familiar.

Request: separate visibility settings for each element on that display line — current mode, hint text, etc.

Maybe something like:

{ "visibility": { "currentMode": false, "modeCycleHints": false } }

(exact key naming up to maintainers) would let the mode indicator itself stay functional while dropping the persistent nagging hint text.