Admin fatturazione: coda pagamenti senza PDF e upload diretto.

Lista globale dei pagamenti da fatturare con dati intestazione, caricamento
PDF per riga che crea la fattura e invia email; rimuove il flusso bozza manuale.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/public/admin.css

@@ -285,3 +285,86 @@ body.admin-body {
   font-size: 0.85rem;
   margin-bottom: 0.25rem;
 }
+
+.billing-pending-list {
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+}
+
+.billing-pending-card {
+  background: var(--card);
+  border: 1px solid var(--card-border);
+  border-radius: 12px;
+  overflow: hidden;
+}
+
+.billing-pending-card__head {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-between;
+  gap: 0.5rem 1rem;
+  padding: 1rem 1.25rem;
+  border-bottom: 1px solid var(--card-border);
+  font-size: 0.95rem;
+}
+
+.billing-pending-card__warn {
+  color: #ffb74d;
+  font-size: 0.85rem;
+}
+
+.billing-pending-card__body {
+  padding: 1rem 1.25rem 1.25rem;
+  display: grid;
+  gap: 1.25rem;
+}
+
+@media (min-width: 900px) {
+  .billing-pending-card__body {
+    grid-template-columns: 1fr minmax(220px, 280px);
+    align-items: start;
+  }
+}
+
+.billing-profile-dl {
+  display: grid;
+  grid-template-columns: auto 1fr;
+  gap: 0.35rem 1rem;
+  margin: 0;
+  font-size: 0.88rem;
+}
+
+.billing-profile-dl dt {
+  color: var(--muted);
+  margin: 0;
+}
+
+.billing-profile-dl dd {
+  margin: 0;
+  word-break: break-word;
+}
+
+.billing-upload-form {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.billing-upload-form__label {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+  font-size: 0.88rem;
+  color: var(--muted);
+}
+
+.billing-upload-form input[type="file"] {
+  font-size: 0.85rem;
+  color: var(--text);
+}
+
+.admin-nav-active {
+  color: var(--red) !important;
+  font-weight: 600;
+}