Squashed 'cms/core/' changes from 2f52ec7..f709b5d

f709b5d core: stage 6 (part) — /api/schema + /api/system + admin System panel

git-subtree-dir: cms/core
git-subtree-split: f709b5dc8ded7f138b21ac0aad4dd0855cb75aba

admin/src/App.jsx

@@ -104,6 +104,7 @@ function Dashboard({ email }) {
           {me?.canModerate && <button className={view === 'moderation' ? 'active' : ''} onClick={() => setView('moderation')}>Moderation</button>}
           {me?.isAdmin && <button className={view === 'forums' ? 'active' : ''} onClick={() => setView('forums')}>Foren</button>}
           {me?.isAdmin && <button className={view === 'users' ? 'active' : ''} onClick={() => setView('users')}>Autor:innen</button>}
+          {me?.isAdmin && <button className={view === 'system' ? 'active' : ''} onClick={() => setView('system')}>System</button>}
         </nav>
         <span className="spacer" />
         <span className="who">{email}</span>
@@ -121,6 +122,8 @@ function Dashboard({ email }) {
           <Forums onMsg={setMsg} />
         ) : view === 'moderation' ? (
           <Moderation onMsg={setMsg} />
+        ) : view === 'system' ? (
+          <System onMsg={setMsg} />
         ) : (
           <>
             <aside>
@@ -445,6 +448,37 @@ function Overview({ onMsg, go }) {
   );
 }
 
+// ── System (nur Admin): core-Version, Plugins, Content-Modell ────────────────
+function System({ onMsg }) {
+  const [s, setS] = useState(null);
+  useEffect(() => { api.system().then(setS).catch((e) => onMsg({ type: 'err', text: e.message })); }, []);
+  if (!s) return <div className="empty">…</div>;
+  return (
+    <div className="profile">
+      <div className="profile-card wide">
+        <h2>System</h2>
+        <div className="sysgrid">
+          <div><span className="muted">Core</span><b>{s.core.name} <span className="ver">v{s.core.version}</span></b></div>
+          <div><span className="muted">Site</span><b>{s.site || '—'}</b></div>
+          <div><span className="muted">Auth</span><b>{s.auth}</b></div>
+          <div><span className="muted">Hugo</span><b>{s.hugo}</b></div>
+        </div>
+        <h3>Plugins <span className="count-pill">{s.plugins.length}</span></h3>
+        {s.plugins.length
+          ? <ul className="syslist">{s.plugins.map((p) => (
+              <li key={p.name}><b>{p.name}</b><span className="muted">{p.routes} Routen · {p.migrations} Migration(en)</span></li>
+            ))}</ul>
+          : <p className="muted">Keine Plugins aktiv.</p>}
+        <h3>Content-Modell <span className="count-pill">{s.collections.length}</span></h3>
+        <ul className="syslist">{s.collections.map((c) => (
+          <li key={c.kind}><b>{c.label}</b><span className="muted">{c.kind} · {c.fields} Felder{c.statKey ? ` · ${c.statKey}` : ''}</span></li>
+        ))}</ul>
+        <p className="muted who-mail">openbureau-core fährt diese Site. Plugins &amp; Content-Modell kommen aus der Site-Config.</p>
+      </div>
+    </div>
+  );
+}
+
 // ── Autor:innen-Verwaltung (nur Admin) ──────────────────────────────────────
 function Users({ onMsg, currentEmail }) {
   const [list, setList] = useState(null);