Backoffice stage 3: orders and providers, auto-assignment

- Auto-assignment: a new order is offered to the best free provider (same ranking as
  the dispatcher hint); a decline or timeout passes it to the next one; nobody is
  offered the same order twice; after N tries it waits for a dispatcher and the team
  is notified once. The worker retries waiting orders every minute. Settings
  assign.auto / assign.maxAutoOffers (toggle on the Orders page, checkbox in old admin).
- Orders: list by day with groups (need a provider, offered, assigned, in progress,
  done, cancelled), periods and search; order card with progress, provider or ranked
  candidates ("offer" / "pick automatically"), details, checklist and photos,
  history in plain words, client, money (superadmin), payment, status change,
  reschedule (slots or custom time), cancel with fee.
- New order for a client (from the client card or the Orders page): params form,
  address, free slots for 14 days, price with the client's discount.
- Providers: list with rating, orders, declines, low ratings, next order; card with
  quality, ratings, upcoming orders, schedule and districts, admission documents,
  block/unblock with reason, new bot link, money and payouts (superadmin).
- Payout gets paidAt/note/createdById; Provider gets blockedReason/blockedAt/adminNote
  and documents (ProviderDoc).
- Tests for auto-assignment.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/admin/src/pages/Settings.tsx

@@ -34,12 +34,16 @@ export function Settings() {
           <div className="form-grid">
             {SETTING_KEYS.map((k) => (
               <Field key={k} label={t(`admin.settings.${k.replace('.', '_')}`)}>
-                <input
-                  className="bc-input"
-                  type={typeof draft[k] === 'number' ? 'number' : 'text'}
-                  value={String(draft[k])}
-                  onChange={(e) => setDraft({ ...draft, [k]: typeof draft[k] === 'number' ? Number(e.target.value) : e.target.value })}
-                />
+                {typeof draft[k] === 'boolean' ? (
+                  <input type="checkbox" checked={draft[k] as boolean} onChange={(e) => setDraft({ ...draft, [k]: e.target.checked })} style={{ width: 22, height: 22 }} />
+                ) : (
+                  <input
+                    className="bc-input"
+                    type={typeof draft[k] === 'number' ? 'number' : 'text'}
+                    value={String(draft[k])}
+                    onChange={(e) => setDraft({ ...draft, [k]: typeof draft[k] === 'number' ? Number(e.target.value) : e.target.value })}
+                  />
+                )}
               </Field>
             ))}
           </div>