- Add "Explore our other services" block to service landing pages

with colour-tinted cards + Our Pricing entry (grey "All services" pill)
- Wrap homepage Instagram CTA in <aside aria-label="...">
- Always emit og:image:width/height with 1200x630 fallback when
  image metadata is unknown
- Add aria-current="page" to active desktop, mega-menu, and mobile
  nav links (exact-path match only — not "Services" parent)
- Richer testimonial alt text derived from dog name in the detail
  field (e.g. "Archie, a happy Goodwalk dog walking client...")
- Tier sitemap.xml priorities: home 1.0, services 0.9, pricing 0.8,
  about/contact 0.7, legal 0.3 (yearly changefreq)
- Bump to 4.1.0

src/routes/[slug]/+page.svelte

@@ -179,11 +179,11 @@
 <Header navigation={data.content.navigation} />
 
 {#if data.slug === 'pack-walks'}
-  <ServiceLandingPage content={data.content} pageContent={packWalksContent} />
+  <ServiceLandingPage content={data.content} pageContent={packWalksContent} currentPath={data.page.canonicalPath} />
 {:else if data.slug === 'dog-walking'}
-  <ServiceLandingPage content={data.content} pageContent={dogWalkingContent} />
+  <ServiceLandingPage content={data.content} pageContent={dogWalkingContent} currentPath={data.page.canonicalPath} />
 {:else if data.slug === 'puppy-visits'}
-  <ServiceLandingPage content={data.content} pageContent={puppyVisitsContent} />
+  <ServiceLandingPage content={data.content} pageContent={puppyVisitsContent} currentPath={data.page.canonicalPath} />
 {:else if data.slug === 'our-pricing'}
   <PricingPage content={data.content} pageContent={ourPricingContent} />
 {:else if data.slug === 'about' || data.slug === 'about-us'}