admin: Übersicht-Dashboard, aufgewertete Nutzerverwaltung, Wiki-Autoren

- Neue /api/stats (Admin, read-only): Inhalte/Nutzer/Dialog-Kennzahlen
- Übersicht-View als Admin-Dashboard: Stat-Karten (klickbar) + Schnellzugriff
- Nutzerverwaltung: Avatar-Initiale, angelegt/zuletzt-aktiv, Rolle beim Anlegen,
  Inline-Passwort (statt prompt), Filter, Rollen-Badge; API liefert last_sign_in_at
- Wiki im Editor anlegbar: Typ 'Wiki-Seite' + Gruppe-Feld → content/wiki/<slug>.md;
  files.js klassifiziert wiki als eigene 'kind' (eigene Sidebar-Gruppe)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

cms/admin/src/styles.css

@@ -184,6 +184,37 @@ label.big input { font-family: var(--serif); font-weight: 600; }
 .mod-actions a { color: var(--muted); }
 .mod-actions button { padding: 4px 11px; font-size: 12.5px; }
 
+/* ── Übersicht / Dashboard ── */
+.overview { width: 100%; overflow: auto; padding: 30px 28px; }
+.overview h2 { font-family: var(--serif); font-weight: 600; margin: 0 0 18px; }
+.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
+.stat-card { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left;
+  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
+.stat-card:not(:disabled):hover { border-color: var(--accent-soft); transform: translateY(-1px); }
+.stat-card:disabled { opacity: 1; cursor: default; }
+.stat-value { font-family: var(--display); font-weight: 700; font-size: 30px; line-height: 1; color: var(--accent); }
+.stat-label { font-family: var(--serif); font-size: 15px; margin-top: 6px; }
+.stat-hint { font-size: 11.5px; color: var(--muted); min-height: 1em; }
+.overview-actions { margin-top: 30px; }
+.overview-actions h3 { font-family: var(--display); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; }
+.quick { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
+.quick-link { display: inline-flex; align-items: center; padding: 8px 16px; border: 1px solid var(--line); border-radius: var(--pill); text-decoration: none; color: var(--muted); }
+.quick-link:hover { border-color: var(--accent-soft); color: var(--text); }
+
+/* ── Nutzerliste (aufgewertet) ── */
+.count-pill { font-family: var(--sans); font-size: 12px; font-weight: 500; color: var(--muted); background: var(--panel-2); border-radius: 20px; padding: 2px 9px; vertical-align: middle; margin-left: 6px; }
+.userfilter { margin: 4px 0 2px; height: 34px; }
+.userlist .uavatar { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-weight: 600; font-size: 13px; flex: none; }
+.userlist .ucol { flex-direction: column; align-items: flex-start; gap: 1px; min-width: 0; }
+.uemail { font-family: var(--serif); font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
+.uemail .you { color: var(--accent); font-family: var(--sans); font-size: 12px; }
+.umeta { font-size: 11.5px; color: var(--muted); }
+.rolebadge { font-size: 11px; border-radius: var(--pill); padding: 3px 10px; font-weight: 600; flex: none; }
+.rolebadge.admin { color: var(--accent); background: rgba(181,74,44,.12); }
+.pwinline { display: flex; align-items: center; gap: 5px; flex: none; }
+.pwinline input { width: 150px; height: 30px; }
+.pwinline button { padding: 4px 10px; font-size: 12.5px; }
+
 /* ── Toast ── */
 .toast { position: fixed; bottom: 20px; right: 20px; padding: 11px 18px; border-radius: 11px; color: #fff; cursor: pointer; box-shadow: 0 10px 30px -12px rgba(0,0,0,.4); font-size: 13.5px; max-width: 380px; z-index: 50; }
 .toast.ok { background: var(--ok); }