feat: 大门v5封存翻转舱——编号模块默认一枚封存徽舱悬在湖面，轻点翻转900ms翻开才见输入格，翻开后半程自动聚焦（冰朔20260816谕：人主动点击模块转一下再输入编号）

product-source/hololake-native-desktop/src/main.tsx

@@ -288,6 +288,14 @@ function HoloLakeApp() {
   const [gateRaw, setGateRaw] = useState('')
   const [gateInf, setGateInf] = useState(false)
   const gateNumber = formatGateNumber(gateRaw) + (gateInf ? '∞' : '')
+  const [gateOpen, setGateOpen] = useState(false)
+  const gateInputRef = useRef<HTMLInputElement>(null)
+  // 封存舱点开翻转后半程再把光标送进输入格，免得翻到一半抢焦点
+  useEffect(() => {
+    if (!gateOpen || gateStage !== 'number') return
+    const timer = window.setTimeout(() => gateInputRef.current?.focus(), 640)
+    return () => window.clearTimeout(timer)
+  }, [gateOpen, gateStage])
   const [gateBusy, setGateBusy] = useState(false)
   const [gateMessage, setGateMessage] = useState('')
   const [gateRising, setGateRising] = useState(false)
@@ -960,13 +968,20 @@ function HoloLakeApp() {
             <p>欢迎回来 · {gateNumber}</p>
           </section>
         ) : gateStage === 'number' ? (
-          <section className={`gate-pod${loginRising ? ' fade-out' : ''}`} role="dialog">
+          <section className={`gate-pod gate-flip${gateOpen ? ' open' : ''}${loginRising ? ' fade-out' : ''}`} role={gateOpen ? 'dialog' : 'button'} tabIndex={gateOpen ? undefined : 0} aria-expanded={gateOpen} onClick={gateOpen ? undefined : () => setGateOpen(true)} onKeyDown={gateOpen ? undefined : (event) => { if (event.key === 'Enter' || event.key === ' ') { event.preventDefault(); setGateOpen(true) } }}>
+            <div className="pod-face pod-sealed" aria-hidden={gateOpen}>
+              <span className="gate-emblem sealed-emblem" aria-hidden="true"><i/></span>
+              <b className="sealed-title">编号校验</b>
+              <small className="sealed-sub">轻点翻启</small>
+            </div>
+            <div className="pod-face pod-form">
             <div className="gate-pod-row">
-              <input id="gate-number" aria-label="编号" autoFocus maxLength={48} value={gateNumber} placeholder="如 ICE-GL∞" onChange={(event) => onGateInput(event.target.value)} onKeyDown={(event) => { if (event.key === 'Enter' && gateNumber) { event.preventDefault(); void gateVerifyNumber() } }}/>
+              <input id="gate-number" ref={gateInputRef} aria-label="编号" maxLength={48} value={gateNumber} placeholder="如 ICE-GL∞" onChange={(event) => onGateInput(event.target.value)} onKeyDown={(event) => { if (event.key === 'Enter' && gateNumber) { event.preventDefault(); void gateVerifyNumber() } }}/>
               <button type="button" className={`gate-inf${gateInf ? ' on' : ''}`} title="编号里带无限符号就点一下点亮" aria-pressed={gateInf} onClick={() => setGateInf((v) => !v)}>∞</button>
             </div>
             <button className="gate-submit" disabled={gateBusy || !gateNumber} onClick={() => void gateVerifyNumber()}>{gateBusy ? '查验中…' : '提交'}</button>
             {gateMessage && <p className="gate-hint">{gateMessage}</p>}
+            </div>
           </section>
         ) : (
           <section className={`gate-pod gate-pod-key${loginRising ? ' fade-out' : ''}`} role="dialog">