- Removed setWorkingVisible(false) call in applyStatuslineUI that hid the working indicator.
- Removed setWorkingVisible(true) and setWorkingIndicator() calls in clearStatuslineUI on teardown.
- Extracted installStatusWidget and installEditor functions from applyStatuslineUI.
- Consolidated duplicate inline event handlers into shared refreshOnEvent function.
- Extracted buildTopBorderLine and findBottomBorderIndex helpers in StatuslineEditor.