Rebrand store as Pulse with athletic theme and shared typography

- Pulse theme tokens in app.schema.json: Archivo Black headings (weight 400)
  + Inter body, white bg / black pill buttons, xl radius, AI-generated
  athletic imagery
- Add headerFontWeight theme prop so single-weight fonts (Archivo Black)
  load and render correctly; ThemeProvider applies font-family + weight
  inline so Typography works regardless of `as` element
- New shared Heading component (tagline / title / subtitle with size +
  align + tone variants) and Typography caption variant for taglines;
  refactor features, faq, cta, testimonials, products-carousel,
  products-grid, collection-grid, recommended-products, image-gallery,
  newsletter-cta to use them
- Hero accepts a `buttons` array (label / href / variant) replacing
  primaryCta/secondaryCta; cover-image component removed and existing
  cover blocks migrated to Hero blocks with `buttons: []`
- Newsletter CTA uses shadcn Button + Input so it inherits theme radius;
  stacked layout fixed to keep the image
- Product/collection card titles use Typography subtitle variants
  (font-body), heading font weight is theme-controlled
- Remove orphan commerce/shop-header.tsx and commerce/shop-footer.tsx;
  the editor-driven navigation/footer are the live chrome

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

components/commerce/collection-card.tsx

@@ -1,6 +1,7 @@
 import React from 'react';
 import { Link } from 'react-router';
 import { Card, CardContent } from '@/components/ui/card';
+import { Typography } from '@/components/Typography';
 
 interface CollectionImage {
   url: string;
@@ -40,9 +41,12 @@ const CollectionCard: React.FC<CollectionCardProps> = ({ collection }) => {
 
         {/* Collection Info */}
         <CardContent className="p-6">
-          <h3 className="text-2xl font-bold text-foreground mb-3 group-hover:text-muted-foreground transition-colors font-heading">
+          <Typography
+            variant="subtitle1"
+            className="mb-3 font-semibold tracking-tight text-foreground transition-colors group-hover:text-muted-foreground"
+          >
             {collection.title}
-          </h3>
+          </Typography>
 
           {collection.description && (
             <p className="text-muted-foreground">