refactor: migrate P1/P2 SLA banner to lt-sla-p1/lt-sla-p2 component

Replaces the lt-alert workaround with the new purpose-built SLA banner
component now in base.css:
- lt-sla-p1 (pulsing red) / lt-sla-p2 (static amber) wrapper classes
- Structured subcomponents: lt-sla-icon, lt-sla-info, lt-sla-title,
  lt-sla-bar + lt-sla-fill (gradient fill), lt-sla-meta, lt-sla-dismiss
- Dismiss now uses banner.hidden + sessionStorage key lt_sla_dismissed_<id>
  (aligns with web_template pattern; previous code used classList 'dismissed')
- Elapsed/remaining/breach state driven by same tick() interval, now updating
  lt-sla-fill width instead of a separate lt-progress bar inside lt-alert-msg

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

views/TicketView.php

@@ -215,56 +215,58 @@ include __DIR__ . '/layout_header.php';
         1 => 8, 2 => 24, default => 72
     };
     $elapsedSeconds = time() - strtotime($ticket['created_at']);
-    $elapsedHours   = round($elapsedSeconds / 3600, 1);
     $slaPct         = min(100, round(($elapsedSeconds / ($slaTargetHours * 3600)) * 100));
     $slaBreached    = $elapsedSeconds >= ($slaTargetHours * 3600);
-    $alertClass     = $priorityNum === 1 ? 'lt-alert--error' : 'lt-alert--warning';
-    $alertIcon      = $priorityNum === 1 ? '[ ! ]' : '[ ~ ]';
-    $alertLabel     = $priorityNum === 1 ? 'CRITICAL — P1 Ticket' : 'HIGH PRIORITY — P2 Ticket';
-    $progressClass  = $slaBreached ? 'lt-progress--red' : ($slaPct >= 75 ? 'lt-progress--red' : 'lt-progress--green');
+    $slaClass       = $priorityNum === 1 ? 'lt-sla-p1' : 'lt-sla-p2';
+    $slaIcon        = $priorityNum === 1 ? '[ ! ]' : '[ ~ ]';
+    $slaLabel       = $priorityNum === 1 ? 'P1 Critical' : 'P2 High';
+    $slaId          = 'sla-' . htmlspecialchars($ticket['ticket_id'], ENT_QUOTES, 'UTF-8');
     ?>
-<!-- Priority alert banner — P1/P2 only, dismissible per session -->
-<div class="lt-alert <?= $alertClass ?>" id="priorityAlertBanner"
-     role="alert" aria-live="polite"
-     data-alert-id="priority-banner-<?= htmlspecialchars($ticket['ticket_id']) ?>"
+<!-- SLA banner — P1/P2 only, dismissible per session -->
+<div class="<?= $slaClass ?>" id="priorityAlertBanner" role="alert" aria-live="polite"
+     data-sla-id="<?= $slaId ?>"
      data-created-at="<?= (int)strtotime($ticket['created_at']) ?>"
      data-sla-hours="<?= $slaTargetHours ?>"
      style="margin-bottom:0.75rem">
-  <span class="lt-alert-icon" aria-hidden="true"><?= $alertIcon ?></span>
-  <div class="lt-alert-body">
-    <div class="lt-alert-title"><?= $alertLabel ?></div>
-    <div class="lt-alert-msg">
-      SLA target: <strong><?= $slaTargetHours ?>h</strong> &mdash;
-      Elapsed: <strong id="slaElapsedTimer"><?= $elapsedHours ?>h</strong>
-      <?php if (!$slaBreached) : ?>
-        &mdash; Remaining: <strong id="slaCountdownTimer" class="lt-text-cyan"></strong>
-      <?php else : ?>
-        &mdash; <span class="lt-text-danger" id="slaCountdownTimer">SLA BREACHED (+<strong id="slaOverrunTimer"><?= round(($elapsedSeconds - $slaTargetHours * 3600) / 3600, 1) ?>h</strong>)</span>
+  <span class="lt-sla-icon" aria-hidden="true"><?= $slaIcon ?></span>
+  <div class="lt-sla-info">
+    <div class="lt-sla-title">
+      <?= $slaLabel ?> — SLA: <span id="slaElapsedTimer"></span> elapsed of <?= $slaTargetHours ?>h limit
+      <?php if ($slaBreached) : ?>
+        &nbsp;<span class="lt-text-danger" id="slaBreachLabel">BREACHED</span>
       <?php endif ?>
-      <div class="lt-progress lt-progress--sm <?= $progressClass ?>" id="slaProgress" style="margin-top:0.35rem"
-           aria-label="SLA progress <?= $slaPct ?>%">
-        <div class="lt-progress-bar" id="slaProgressBar" style="width:<?= $slaPct ?>%"></div>
-      </div>
+    </div>
+    <div class="lt-sla-bar" aria-label="SLA progress <?= $slaPct ?>%" id="slaProgress">
+      <div class="lt-sla-fill" id="slaProgressBar" style="width:<?= $slaPct ?>%"></div>
     </div>
   </div>
-  <button type="button" class="lt-alert-close" data-action="dismiss-priority-banner" aria-label="Dismiss">&#x2715;</button>
+  <?php if (!$slaBreached) : ?>
+    <div class="lt-sla-meta" id="slaCountdownTimer"></div>
+  <?php else : ?>
+    <div class="lt-sla-meta lt-text-danger" id="slaCountdownTimer">+<span id="slaOverrunTimer"><?= round(($elapsedSeconds - $slaTargetHours * 3600) / 3600, 1) ?>h</span> over</div>
+  <?php endif ?>
+  <button type="button" class="lt-sla-dismiss" aria-label="Dismiss">&#x2715;</button>
 </div>
 <script nonce="<?= htmlspecialchars($nonce, ENT_QUOTES, 'UTF-8') ?>">
 (function(){
   var banner = document.getElementById('priorityAlertBanner');
-  var id = 'priority-banner-<?= htmlspecialchars($ticket['ticket_id']) ?>';
-  try { if(sessionStorage.getItem('lt_dismissed_'+id)) banner.classList.add('dismissed'); } catch(e) {}
+  var id = banner.dataset.slaId;
+  try { if (id && sessionStorage.getItem('lt_sla_dismissed_' + id)) banner.hidden = true; } catch(e) {}
+
+  banner.querySelector('.lt-sla-dismiss').addEventListener('click', function() {
+    banner.hidden = true;
+    try { if (id) sessionStorage.setItem('lt_sla_dismissed_' + id, '1'); } catch(e) {}
+  });
 
-  // Live SLA timers — start after base.js initialises lt
   document.addEventListener('DOMContentLoaded', function() {
-    if (!banner || banner.classList.contains('dismissed')) return;
+    if (banner.hidden) return;
     var createdAt = parseInt(banner.dataset.createdAt, 10) * 1000;
-    var slaMs = parseInt(banner.dataset.slaHours, 10) * 3600 * 1000;
-    var deadline = new Date(createdAt + slaMs);
-    var elapsedEl = document.getElementById('slaElapsedTimer');
+    var slaMs     = parseInt(banner.dataset.slaHours, 10) * 3600 * 1000;
+    var deadline  = new Date(createdAt + slaMs);
+    var elapsedEl   = document.getElementById('slaElapsedTimer');
     var countdownEl = document.getElementById('slaCountdownTimer');
-    var overrunEl = document.getElementById('slaOverrunTimer');
-    var progressBar = document.getElementById('slaProgressBar');
+    var overrunEl   = document.getElementById('slaOverrunTimer');
+    var fillBar     = document.getElementById('slaProgressBar');
     var progressWrap = document.getElementById('slaProgress');
 
     function fmtHMS(ms) {
@@ -274,35 +276,19 @@ include __DIR__ . '/layout_header.php';
     }
 
     function tick() {
-      var now = Date.now();
-      var elapsed = now - createdAt;
+      var now      = Date.now();
+      var elapsed  = now - createdAt;
       var remaining = deadline - now;
-      var pct = Math.min(100, Math.round((elapsed / slaMs) * 100));
+      var pct      = Math.min(100, Math.round((elapsed / slaMs) * 100));
 
-      if (elapsedEl) elapsedEl.textContent = fmtHMS(elapsed);
-      if (progressBar) progressBar.style.width = pct + '%';
+      if (elapsedEl)   elapsedEl.textContent = fmtHMS(elapsed);
+      if (fillBar)     fillBar.style.width = pct + '%';
       if (progressWrap) progressWrap.setAttribute('aria-label', 'SLA progress ' + pct + '%');
 
       if (remaining > 0) {
-        // SLA not yet breached
-        if (countdownEl) {
-          countdownEl.textContent = fmtHMS(remaining) + ' remaining';
-          countdownEl.className = pct >= 75 ? 'lt-text-danger' : 'lt-text-cyan';
-        }
-        if (progressWrap && pct >= 75) {
-          progressWrap.className = progressWrap.className.replace('lt-progress--green','lt-progress--red');
-        }
+        if (countdownEl) countdownEl.textContent = fmtHMS(remaining) + ' remaining';
       } else {
-        // Breached
-        if (countdownEl && !overrunEl) {
-          countdownEl.innerHTML = 'SLA BREACHED (+' + fmtHMS(-remaining) + ')';
-          countdownEl.className = 'lt-text-danger';
-        } else if (overrunEl) {
-          overrunEl.textContent = fmtHMS(-remaining);
-        }
-        if (progressWrap && !progressWrap.classList.contains('lt-progress--red')) {
-          progressWrap.className = progressWrap.className.replace('lt-progress--green','').replace('lt-progress--red','') + ' lt-progress--red';
-        }
+        if (overrunEl) overrunEl.textContent = fmtHMS(-remaining);
       }
     }