PATCH /clinic-config/chronicle-context-bar — replace the chip list, in order. Unknown keys are rejected (a typo would otherwise vanish silently on render); duplicates collapse to the first. `chips: null` returns the clinic to the default set.

Ordered chip keys. On read, null means the clinic never customised the bar and the web app shows its default set. On write, the full ordered list (empty = no chips), or null to return to the default set.

Ordered chip keys. On read, null means the clinic never customised the bar and the web app shows its default set. On write, the full ordered list (empty = no chips), or null to return to the default set.