Add three icons, a styleable menu button and a reliable back-to-top in 1.13.0

The icon set had no drawing for people, music or a house - the three pictures
the Tagespflege Moldovan template asks for. They join as `people`, `music` and
`home`; a test keeps the list and the drawings together, because a missing path
renders an empty `<path d="">`: invisible, without an error.

An icon block's own colour never reached its drawing: the embedded SVG carries
the same `block-icon` class as its wrapper and set the accent colour again.
`.block-icon .block-icon{color:inherit}` fixes it at the root.

The menu button becomes a thing you can shape. `burgerLabel` chooses symbol and
text, text only or symbol only (which keeps the name for screen readers), and
the new style group `menu` targets the button itself, the way `img` targets an
image and `controls` the slider. Inside the header the opened menu now lies
under the header across the full width instead of pushing the header apart -
on a phone that looked like a missing navigation.

The back-to-top button no longer depends on `animation-timeline: scroll()`. A
browser that parses the property but does not run the timeline left it in the
first frame of the animation: permanently invisible. Two classes from
scrolled.js decide now, and without a script the button simply stays visible.

Also: the Tagespflege Moldovan rebuild as its own installation, built only by
`scripts/seed-tagespflege-moldovan.php`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

public/assets/scrolled.js

@@ -8,12 +8,27 @@
  */
 export function initScrolled(doc = document) {
   const view = doc.defaultView;
+  const root = doc.documentElement;
+  // Der Nach-oben-Knopf blendete sich ueber eine Scroll-Animation ein. Browser, die
+  // `animation-timeline: scroll()` zwar kennen, aber nicht ausfuehren, liessen ihn im ersten
+  // Bild der Animation stehen - unsichtbar, dauerhaft. Deshalb entscheidet jetzt eine Klasse.
+  // Ohne dieses Skript bleibt der Knopf sichtbar: erreichbar ist besser als unsichtbar.
+  const after = parseInt(getComputedStyle(root).getPropertyValue('--kant-top-after'), 10);
+  const schwelle = Number.isFinite(after) && after > 0 ? after : 400;
   let queued = false;
-  const sync = () => { queued = false; doc.documentElement.classList.toggle('is-scrolled', view.scrollY > 40); };
+  const sync = () => {
+    queued = false;
+    root.classList.toggle('is-scrolled', view.scrollY > 40);
+    root.classList.toggle('kant-top-shown', view.scrollY > schwelle);
+  };
   const onScroll = () => { if (!queued) { queued = true; view.requestAnimationFrame(sync); } };
   view.addEventListener('scroll', onScroll, { passive: true });
+  root.classList.add('kant-top-armed');
   sync();
-  return () => { view.removeEventListener('scroll', onScroll); doc.documentElement.classList.remove('is-scrolled'); };
+  return () => {
+    view.removeEventListener('scroll', onScroll);
+    root.classList.remove('is-scrolled', 'kant-top-armed', 'kant-top-shown');
+  };
 }
 
 if (!document.querySelector('#editor')) initScrolled();