style(ui): restyle cards, buttons, and icons for consistency
- Redesign brew cards: replace pill badges with text notes, add
full-width Brew Again button with cup icon, adjust card height
- Redesign bag cards: move Brew/Close buttons below progress bar,
add Close button label, reduce card height
- Restyle account page buttons (Sign Out, Restore, Reset, Cancel)
to use consistent bordered-accent pattern
- Replace thin logout icon with Font Awesome person-running SVG
- Update homepage stats labels and quick action buttons to text-sm
- Add empty state placeholders for brews, bags, and activity sections
- Enlarge logo click target, swap theme toggle icons, add font-medium
to mobile tab selector
- Remove small-caps from scan input "or" labels
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