fix: Add gap between filter/create button on mobile settings pages (#115)
## Summary
- Added `gap-4` to the flex containers holding the filter input and
create button on the accounts, categories, labels, and connections
settings pages
- Without the gap, these elements had no spacing on mobile viewports and
appeared cramped
- The automation rules page already had `gap-4` — this makes all
settings pages consistent
## Screenshots (mobile 375px)
### Accounts
### Categories
### Labels
### Connections
## Test plan
- [x] Verify gap appears between filter input and create button on
mobile for accounts, categories, labels, and connections settings pages
- [x] Verify desktop layout is unaffected
726bce61ef
