Streamlined estimate settings layout

Estimate settings form is cleaner and more compact — Taxable toggle now sits inline on the quantity row.

Improvements

The estimate settings page is now cleaner and more focused. The "Primary" badge on branch cards has been removed (branch code alone provides sufficient context), and the Taxable toggle now sits inline on the quantity row instead of taking up a full-width line below.

These changes reduce visual clutter and make the form more compact without sacrificing clarity.