All internal links used plain <a href>, causing full page reloads
between pages in the same live_session. Changed to <.link navigate>
for client-side navigation across layout, product, cart, base, and
content components.
Added explicit width/height attributes to all SVG icons so they
render at sensible sizes before CSS loads on initial page visit.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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