feat: TTLock API server selector (EU vs China) + pass apiServer to agent

- Add api_server column to hotel_ttlock_config (migration 053)
- GET/PATCH config includes apiServer field
- issue-card passes apiServer to agent command
- Agent: WriteCardCmd.apiServer optional, all API calls use it
- TTLockPage: radio buttons EU/China with hint about 404 error

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/TTLockPage.tsx

@@ -142,6 +142,7 @@ export function TTLockPage() {
   const [clientId, setClientId]         = useState('')
   const [clientSecret, setClientSecret] = useState('')
   const [cardSectors, setCardSectors]   = useState('1,2,3,4,5,6,7,8,9,10')
+  const [apiServer, setApiServer]       = useState('https://euopen.ttlock.com')
 
   // Per-workstation COM port state
   const [wsComPorts, setWsComPorts]   = useState<Record<string, string>>({})
@@ -241,6 +242,7 @@ export function TTLockPage() {
       setIsEnabled(cfg.isEnabled)
       setClientId(cfg.clientId)
       setCardSectors(cfg.cardSectors || '1,2,3,4,5,6,7,8,9,10')
+      setApiServer(cfg.apiServer || 'https://euopen.ttlock.com')
       setMappings(maps)
       setRooms(roomList)
       setWorkstations(wsList)
@@ -263,6 +265,7 @@ export function TTLockPage() {
         clientId:     clientId.trim(),
         clientSecret: clientSecret.trim() || undefined,
         cardSectors:  cardSectors.trim(),
+        apiServer:    apiServer,
       })
       showSuccess('Настройки сохранены')
       setClientSecret('')
@@ -391,6 +394,41 @@ export function TTLockPage() {
             </div>
           </div>
 
+          {/* Сервер TTLock API */}
+          <div>
+            <label className="form-label">Сервер TTLock API</label>
+            <div className="flex gap-3 mt-1">
+              {[
+                { value: 'https://euopen.ttlock.com', label: 'EU', hint: 'euopen.ttlock.com' },
+                { value: 'https://open.ttlock.com',   label: 'China', hint: 'open.ttlock.com' },
+              ].map(opt => (
+                <label
+                  key={opt.value}
+                  className={cn(
+                    'flex items-center gap-2 px-4 py-2.5 rounded-lg border-2 cursor-pointer transition-colors select-none',
+                    apiServer === opt.value
+                      ? 'border-brand-500 bg-brand-50 dark:bg-brand-900/20 text-brand-700 dark:text-brand-300'
+                      : 'border-slate-200 dark:border-slate-700 text-slate-600 dark:text-slate-400 hover:border-slate-300',
+                  )}
+                >
+                  <input
+                    type="radio"
+                    name="apiServer"
+                    value={opt.value}
+                    checked={apiServer === opt.value}
+                    onChange={() => setApiServer(opt.value)}
+                    className="sr-only"
+                  />
+                  <span className="font-semibold text-sm">{opt.label}</span>
+                  <span className="text-xs font-mono opacity-60">{opt.hint}</span>
+                </label>
+              ))}
+            </div>
+            <p className="text-xs text-slate-400 mt-1.5">
+              Если получаете ошибку 404 при выдаче карты — попробуйте другой сервер.
+            </p>
+          </div>
+
           {/* Секторы карты — визуальный пикер */}
           <div>
             <label className="form-label">Секторы карты</label>