fix: aria-required sync, aria-label pills, deduplicate setDuration logic

- updateSuppressForm() now sets required + aria-required on sup-name/sup-detail
  when target type changes; sup-reason gets static aria-required="true"
- onTypeChange() in suppressions page syncs aria-required on s-name
- s-name in suppressions.html gets initial required/aria-required (default type=host)
- Duration pills in both modal and suppressions page now have descriptive
  aria-label ("30 minutes", "1 hour", etc.) alongside the group aria-label
- setDuration() in app.js accepts optional {expiresId,pillSel,hintId} opts so
  logic lives in one place; suppressions.html setDur() delegates to it
- Post-create form reset uses setDur() instead of manually patching DOM

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

static/app.js

@@ -294,18 +294,33 @@ function updateSuppressForm() {
   const type      = document.getElementById('sup-type').value;
   const nameGrp   = document.getElementById('sup-name-group');
   const detailGrp = document.getElementById('sup-detail-group');
+  const nameInput   = document.getElementById('sup-name');
+  const detailInput = document.getElementById('sup-detail');
   if (nameGrp)   nameGrp.style.display   = (type === 'all') ? 'none' : '';
   if (detailGrp) detailGrp.style.display = (type === 'interface') ? '' : 'none';
+  if (nameInput) {
+    const req = (type !== 'all');
+    nameInput.required = req;
+    nameInput.setAttribute('aria-required', String(req));
+  }
+  if (detailInput) {
+    const req = (type === 'interface');
+    detailInput.required = req;
+    detailInput.setAttribute('aria-required', String(req));
+  }
 }
 
-function setDuration(mins, el) {
-  document.getElementById('sup-expires').value = mins || '';
-  document.querySelectorAll('#suppress-modal .pill').forEach(p => {
+function setDuration(mins, el, opts) {
+  const o         = opts || {};
+  const expiresEl = document.getElementById(o.expiresId || 'sup-expires');
+  const pillSel   = o.pillSel || '#suppress-modal .pill';
+  const hint      = document.getElementById(o.hintId || 'duration-hint');
+  if (expiresEl) expiresEl.value = mins || '';
+  document.querySelectorAll(pillSel).forEach(p => {
     p.classList.remove('active');
     p.setAttribute('aria-pressed', 'false');
   });
   if (el) { el.classList.add('active'); el.setAttribute('aria-pressed', 'true'); }
-  const hint = document.getElementById('duration-hint');
   if (hint) {
     if (mins) {
       const h = Math.floor(mins / 60), m = mins % 60;