Struttura: il sito esistente si sposta sotto apps/sito

Primo passo della separazione sito / piattaforme decisa da Adriano il 03/09:
due applicazioni autosufficienti, senza workspace di root, cosi' che ognuna
resti un progetto Astro completo ed estraibile.

Qui non cambia niente del codice: solo la radice. I pattern del .gitignore
che avevano una barra erano ancorati alla radice e dopo lo spostamento non
avrebbero piu' coperto niente (data/*.db*, uploads/*): resi validi a
qualunque profondita'.

Suite: 45 file, 347 test verdi prima e dopo lo spostamento.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EndnceRA5WnA6rvA5iV9WL

apps/sito/src/components/Header.astro

@@ -0,0 +1,133 @@
+---
+import { site } from '../data/site';
+import { piattaforme } from '../data/piattaforme';
+import { t, contentImageUrl } from '../lib/content';
+import { landingFor } from '../lib/auth';
+interface Props {
+  user: { username: string; role: string } | null;
+  showTags: boolean;
+  canTags: boolean;
+}
+const { user, canTags, showTags } = Astro.props;
+const path = Astro.url.pathname;
+const loginHref = `/login?next=${encodeURIComponent(path)}`;
+const areaHref = user ? landingFor(user.role) : '/admin';
+// Le piattaforme riservate compaiono nel menu solo a chi può davvero aprirle.
+const canPiattaforme = user?.role === 'piattaforme' || user?.role === 'admin';
+const inPiattaforme = piattaforme.some((p) => path === p.href || path.startsWith(`${p.href}/`));
+---
+<header class="hdr" id="site-header">
+  <div class="container hdr__in">
+    <a href="/" class="hdr__logo"><img src={contentImageUrl('header.logo.image', '/img/logo-dark.png')} alt={t('header.logo.alt')} width="150" /></a>
+    <nav class="hdr__nav" id="site-nav" aria-label="principale">
+      {site.navigation.map((item, i) => (
+        (!('adminOnly' in item && item.adminOnly) || user?.role === 'admin') && (
+          <a href={item.href} class:list={['hdr__link', { 'is-active': path === item.href || (item.href !== '/' && path.startsWith(item.href)) }]}>{t(`global.nav.${i + 1}.label`)}</a>
+        )
+      ))}
+      {canPiattaforme && (
+        <details class="plat">
+          <summary class:list={['hdr__link', 'hdr__link--bio', 'plat__btn', { 'is-active': inPiattaforme }]}>Piattaforme ▾</summary>
+          <div class="plat__panel">
+            {piattaforme.map((p) => (
+              <a href={p.href} class:list={['plat__item', { 'is-active': path === p.href || path.startsWith(`${p.href}/`) }]}>{p.label}</a>
+            ))}
+          </div>
+        </details>
+      )}
+    </nav>
+    <div class="hdr__user">
+      {user ? (
+        <details class="umenu">
+          <summary class="umenu__btn">{user.username} ▾</summary>
+          <div class="umenu__panel">
+            <a href={areaHref}>Area riservata</a>
+            {canTags && (
+              <button type="button" class="umenu__tags" id="toggle-tags" data-on={showTags ? '1' : '0'}>{showTags ? 'Nascondi tag' : 'Mostra tag'}</button>
+            )}
+            <a href="/admin/logout">Esci</a>
+          </div>
+        </details>
+      ) : (
+        <a class="hdr__login" href={loginHref}>Accedi</a>
+      )}
+    </div>
+    <button class="hdr__burger" id="nav-toggle" aria-label="Apri menu" aria-expanded="false">
+      <span></span><span></span><span></span>
+    </button>
+  </div>
+</header>
+
+<style>
+  .hdr { position: sticky; top: 0; z-index: 100; background: #fff; transition: box-shadow .2s; }
+  .hdr.is-scrolled { box-shadow: 0 2px 14px rgba(0,0,0,.08); }
+  .hdr__in { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
+  .hdr__nav { display: flex; gap: 34px; }
+  .hdr__link { font-family: var(--font-heading); font-size: .72rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; text-decoration: none; color: var(--c-heading); transition: color .3s ease; }
+  .hdr__link:hover, .hdr__link.is-active { color: var(--c-accent-dark); }
+  .hdr__link--bio { color: var(--c-accent-dark); }
+  /* Menu Piattaforme: su desktop è un pannello che scende dalla voce, in mobile —
+     dove la nav è già una colonna — le voci si aprono in linea sotto il titolo. */
+  .plat { position: relative; }
+  .plat__btn { cursor: pointer; list-style: none; }
+  .plat__btn::-webkit-details-marker { display: none; }
+  .plat__panel {
+    position: absolute; left: 0; top: calc(100% + 14px); background: #fff; min-width: 210px;
+    box-shadow: 0 8px 22px rgba(0,0,0,.12); display: flex; flex-direction: column; padding: 8px 0; z-index: 200;
+  }
+  .plat__item { padding: 10px 16px; font-size: .8rem; text-decoration: none; color: var(--c-heading); }
+  .plat__item:hover, .plat__item.is-active { background: #f4f2ef; color: var(--c-accent-dark); }
+  .hdr__burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
+  .hdr__burger span { display: block; width: 22px; height: 2px; background: var(--c-heading); margin: 5px 0; }
+  @media (max-width: 991px) {
+    .hdr__nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: #fff; flex-direction: column; gap: 0; padding: 10px 20px 20px; box-shadow: 0 10px 20px rgba(0,0,0,.08); }
+    .hdr__nav.is-open { display: flex; }
+    .hdr__link { padding: 12px 0; }
+    .hdr__burger { display: block; }
+    .plat__panel { position: static; box-shadow: none; padding: 0 0 8px; min-width: 0; }
+    .plat__item { padding: 10px 0 10px 14px; }
+  }
+  .hdr__user { display: flex; align-items: center; }
+  .hdr__login { font-family: var(--font-heading); font-size: .72rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; text-decoration: none; color: var(--c-heading); }
+  .hdr__login:hover { color: var(--c-accent-dark); }
+  .umenu { position: relative; }
+  .umenu__btn { cursor: pointer; list-style: none; font-family: var(--font-heading); font-size: .72rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--c-heading); }
+  .umenu__btn::-webkit-details-marker { display: none; }
+  .umenu__panel { position: absolute; right: 0; top: calc(100% + 8px); background: #fff; box-shadow: 0 8px 22px rgba(0,0,0,.12); min-width: 180px; display: flex; flex-direction: column; padding: 8px 0; z-index: 200; }
+  .umenu__panel a, .umenu__tags { padding: 10px 16px; text-align: left; background: none; border: 0; cursor: pointer; font: inherit; font-size: .8rem; text-decoration: none; color: var(--c-heading); }
+  .umenu__panel a:hover, .umenu__tags:hover { background: #f4f2ef; }
+</style>
+
+<script>
+  const header = document.getElementById('site-header')!;
+  const toggle = document.getElementById('nav-toggle')!;
+  const nav = document.getElementById('site-nav')!;
+  addEventListener('scroll', () => header.classList.toggle('is-scrolled', scrollY > 10), { passive: true });
+  toggle.addEventListener('click', () => {
+    const open = nav.classList.toggle('is-open');
+    toggle.setAttribute('aria-expanded', String(open));
+  });
+
+  // Il pannello Piattaforme è un <details>: da solo resterebbe aperto anche cliccando altrove.
+  const plat = document.querySelector<HTMLDetailsElement>('.plat');
+  if (plat) {
+    document.addEventListener('click', (e) => {
+      if (plat.open && !plat.contains(e.target as Node)) plat.open = false;
+    });
+    document.addEventListener('keydown', (e) => { if (e.key === 'Escape') plat.open = false; });
+  }
+
+  const tagsBtn = document.getElementById('toggle-tags');
+  if (tagsBtn) {
+    const on = tagsBtn.dataset.on === '1';
+    tagsBtn.addEventListener('click', async () => {
+      const res = await fetch('/api/admin/showtags', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ on: !on }),
+      });
+      if (res.ok) location.reload();
+      else alert('Operazione non riuscita.');
+    });
+  }
+</script>