First-time users opening Cmd-K saw a blank input + a long list of
items. Add a 6-row 'Try saying' panel that shows real typeable
commands with kbd-styled chips and one-line hints. Hides as soon
as the user types anything, so power-users aren't slowed down.
Controlled-input wiring: useState<query>, onValueChange, reset on
close. cmdk handles the actual filtering as before.
31/31 vitest pass.
