Elevate the Planner page presentation to match the TransactionList
reference: category-limit and savings-goal rows now use IconChip for
the category/goal chip, SectionHeader for the "+" add actions, and
EmptyState for the empty limits/goals states (split from the existing
Mongolian copy, no new strings invented). The unset daily-limit card
now shows a subtle "Лимит тохируулаагүй" hint instead of "0₮ / —".
Pure presentation — usePutBudget's full-categories-echo save and all
mutation/dialog logic are untouched.
