Add floating call/SMS CTA widget; fix tel: link coverage

- Floating widget (bottom-right, fixed) with two circular icon buttons:
  call (amber, tel:+17166021429) and SMS (green, sms:+17166021429)
- Widget renders on every page via _footer.php global template
- SVG phone and message icons, hover scale transition, ARIA labels
- CSS added to components.css (.float-cta, .float-cta__call, .float-cta__sms)
- Verified all existing tel: links already correct in header, footer, templates

assets/css/components.css

@@ -2089,4 +2089,38 @@ html, body {
   margin-top: var(--space-4);
   transition: gap var(--transition);
 }
+
+/* --- Floating Call / SMS ---------------------------------- */
+.float-cta {
+  position: fixed;
+  bottom: 1.5rem;
+  right: 1.5rem;
+  z-index: 900;
+  display: flex;
+  flex-direction: column;
+  gap: .65rem;
+}
+.float-cta a {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 3.25rem;
+  height: 3.25rem;
+  border-radius: 50%;
+  box-shadow: 0 4px 16px rgba(0,0,0,.35);
+  transition: transform .18s ease, box-shadow .18s ease;
+  text-decoration: none;
+}
+.float-cta a:hover,
+.float-cta a:focus-visible {
+  transform: scale(1.1);
+  box-shadow: 0 6px 22px rgba(0,0,0,.45);
+}
+.float-cta__call { background: var(--amber); }
+.float-cta__sms  { background: #25a244; }
+.float-cta a svg {
+  width: 1.5rem;
+  height: 1.5rem;
+  fill: #fff;
+}
 .card--service:hover .card-link { gap: var(--space-3); }