imaging: LAPS-password-to-QR generator per bay card

Per-bay <details> section with:
 - Input field for LAPS password (paste from Intune portal manually,
   since deep-link to LAPS blade needs AAD objectId we can't obtain)
 - Make QR button generates a client-side QR from the input
 - QR displayed below at 280px with 4-cell quiet zone
 - Auto-clears input + QR after 60s with live countdown
 - Manual Clear button
 - Enter key on the input also triggers QR generation

Password never POSTs to server, never logged, never persists past the
60s window. Generated using the same qrcode-generator lib already
loaded for the device-id QR. Scan with a USB barcode scanner plugged
into the bay (HID keyboard mode) -> password types into bay login
field. Faster than reading off the Intune portal letter-by-letter.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

webapp/templates/imaging.html

@@ -96,6 +96,23 @@
       </div>
       {% endif %}
 
+      {% if s.intune_device_id %}
+      <details class="mt-2 laps-card">
+        <summary class="text-muted small">LAPS password QR (paste -> scan on bay)</summary>
+        <div class="d-flex align-items-center gap-2 mt-2">
+          <input type="text"
+                 class="form-control form-control-sm laps-input"
+                 style="font-family: monospace; max-width: 22rem;"
+                 placeholder="paste LAPS password from Intune portal here"
+                 autocomplete="off">
+          <button type="button" class="btn btn-sm btn-primary laps-make-btn">Make QR</button>
+          <button type="button" class="btn btn-sm btn-outline-secondary laps-clear-btn" style="display:none;">Clear</button>
+          <span class="laps-timer text-muted small"></span>
+        </div>
+        <div class="laps-qr-container mt-2"></div>
+      </details>
+      {% endif %}
+
       {% if s.log_tail %}
       <details>
         <summary class="text-muted small">Log tail ({{ s.log_tail | length }} line{{ 's' if s.log_tail | length != 1 }})</summary>
@@ -202,5 +219,67 @@ document.addEventListener('click', function(e) {
     copyText(text).then(function() { flashCopied(btn, true); })
                   .catch(function(err) { console.error('copy failed:', err); flashCopied(btn, false); });
 });
+
+// LAPS password -> client-side QR. Password never leaves browser tab.
+// Auto-clears input + QR after 60s so it doesn't linger on shared screens.
+function renderLapsQR(card) {
+    var input     = card.querySelector('.laps-input');
+    var container = card.querySelector('.laps-qr-container');
+    var makeBtn   = card.querySelector('.laps-make-btn');
+    var clearBtn  = card.querySelector('.laps-clear-btn');
+    var timerEl   = card.querySelector('.laps-timer');
+    var text = input.value;
+    if (!text) { input.focus(); return; }
+    try {
+        var qr = qrcode(0, 'M');
+        qr.addData(text);
+        qr.make();
+        var modules = qr.getModuleCount();
+        var size = 280;
+        var cellSize = Math.max(1, Math.floor(size / (modules + 8)));
+        container.innerHTML = qr.createImgTag(cellSize, 4);
+        makeBtn.style.display  = 'none';
+        clearBtn.style.display = '';
+        var remaining = 60;
+        timerEl.textContent = '(auto-clears in ' + remaining + 's)';
+        if (card._lapsTimer) clearInterval(card._lapsTimer);
+        card._lapsTimer = setInterval(function() {
+            remaining--;
+            if (remaining <= 0) { clearLapsQR(card); return; }
+            timerEl.textContent = '(auto-clears in ' + remaining + 's)';
+        }, 1000);
+    } catch (err) {
+        container.textContent = 'QR error: ' + err;
+    }
+}
+function clearLapsQR(card) {
+    var input     = card.querySelector('.laps-input');
+    var container = card.querySelector('.laps-qr-container');
+    var makeBtn   = card.querySelector('.laps-make-btn');
+    var clearBtn  = card.querySelector('.laps-clear-btn');
+    var timerEl   = card.querySelector('.laps-timer');
+    if (card._lapsTimer) { clearInterval(card._lapsTimer); card._lapsTimer = null; }
+    input.value = '';
+    container.innerHTML = '';
+    timerEl.textContent = '';
+    makeBtn.style.display  = '';
+    clearBtn.style.display = 'none';
+}
+document.addEventListener('click', function(e) {
+    var card;
+    if (e.target.classList.contains('laps-make-btn')) {
+        card = e.target.closest('.laps-card');
+        if (card) renderLapsQR(card);
+    } else if (e.target.classList.contains('laps-clear-btn')) {
+        card = e.target.closest('.laps-card');
+        if (card) clearLapsQR(card);
+    }
+});
+document.addEventListener('keydown', function(e) {
+    if (e.key === 'Enter' && e.target.classList.contains('laps-input')) {
+        var card = e.target.closest('.laps-card');
+        if (card) { e.preventDefault(); renderLapsQR(card); }
+    }
+});
 </script>
 {% endblock %}