schedules fire-now: render FireNowReport inline on the button

damocles's #472 returns `{ ok, failed, missing, one_shot_consumed }`
from the fire-now endpoint. Parse the response and flash the
per-target outcome on the button itself for ~1.5s before
refreshSchedules() repaints — operator sees the result
immediately without a modal alert or an `/api/schedules`
re-fetch round-trip.

Button label transitions:
  ↯ fire now  →  ◐ firing…  →  ↯ fired: 3 ok, 1 missing — consumed
                                (green flash, then row refresh)

frontend/packages/dashboard/src/app.js

@@ -2360,7 +2360,7 @@ window.marked = marked;
         fireBtn.disabled = true;
         fireBtn.title = 'every target is cancelled — nothing to fire';
       }
-      fireBtn.addEventListener('click', () => fireScheduleNow(s.id, isOneShot, activeTargets.map((t) => t.target)));
+      fireBtn.addEventListener('click', () => fireScheduleNow(s.id, isOneShot, activeTargets.map((t) => t.target), fireBtn));
       actions.append(fireBtn);
       const editBtn = el('button', { type: 'button', class: 'btn btn-edit-schedule' },
         editingSchedules.has(s.id) ? '✎ close edit' : '✎ edit');
@@ -2568,7 +2568,7 @@ window.marked = marked;
       if (submitBtn) { submitBtn.disabled = false; submitBtn.textContent = originalLabel; }
     }
   }
-  async function fireScheduleNow(id, isOneShot, targets) {
+  async function fireScheduleNow(id, isOneShot, targets, btn) {
     const targetList = targets.length ? targets.join(', ') : '(no active targets)';
     const prompt = isOneShot
       ? `fire schedule #${id} now to ${targetList}?\n\n`
@@ -2578,6 +2578,8 @@ window.marked = marked;
         + 'this is RECURRING — sends an extra pulse out-of-band. '
         + 'the regular cadence keeps firing on schedule.';
     if (!confirm(prompt)) return;
+    const originalLabel = btn ? btn.innerHTML : '';
+    if (btn) { btn.disabled = true; btn.innerHTML = '<span class="spinner">◐</span> firing…'; }
     try {
       const resp = await fetch('/api/schedules/' + encodeURIComponent(id) + '/fire-now', {
         method: 'POST',
@@ -2586,11 +2588,30 @@ window.marked = marked;
       if (!resp.ok) {
         const text = await resp.text().catch(() => '');
         alert('fire-now failed: http ' + resp.status + (text ? '\n\n' + text : ''));
+        if (btn) { btn.disabled = false; btn.innerHTML = originalLabel; }
         return;
       }
-      await refreshSchedules();
+      // Backend returns FireNowReport { ok, failed, missing, one_shot_consumed }.
+      // Flash the per-target outcome on the button itself so the operator
+      // sees the result immediately, then refresh to pick up the
+      // authoritative per-target `last_result` annotations.
+      let report = null;
+      try { report = await resp.json(); } catch { /* shape drift / empty body — ignore */ }
+      if (btn && report) {
+        const bits = [];
+        if (report.ok) bits.push(report.ok + ' ok');
+        if (report.failed) bits.push(report.failed + ' failed');
+        if (report.missing) bits.push(report.missing + ' missing');
+        const suffix = report.one_shot_consumed ? ' — consumed' : '';
+        btn.innerHTML = '↯ fired: ' + (bits.join(', ') || 'no targets') + suffix;
+        btn.classList.add('btn-fire-now-flashed');
+      }
+      // Hold the flash briefly so the operator can read it before the
+      // refresh wipes the row in place.
+      setTimeout(() => { refreshSchedules(); }, 1500);
     } catch (err) {
       alert('fire-now failed: ' + err);
+      if (btn) { btn.disabled = false; btn.innerHTML = originalLabel; }
     }
   }
   async function cancelScheduleAll(id) {

frontend/packages/dashboard/src/dashboard.css

@@ -851,6 +851,15 @@ ul form.inline { display: inline-block; }
 .btn-talk { color: var(--cyan); border-color: var(--cyan); }
 .btn-spawn { color: var(--amber); border-color: var(--amber); }
 .btn-fire-now { color: var(--mauve, #cba6f7); border-color: var(--mauve, #cba6f7); }
+/* Post-fire flash: report renders directly on the button for ~1.5s
+   so the operator sees ok/failed/missing/consumed counts inline
+   without a modal. Green when at least one ok; muted otherwise. */
+.btn-fire-now-flashed {
+  color: var(--green);
+  border-color: var(--green);
+  text-shadow: 0 0 6px currentColor;
+  box-shadow: 0 0 8px -2px currentColor;
+}
 /* #474: inline edit button on each schedule row. Yellow reads as a
    parallel destructive-adjacent action (edit changes state, but
    isn't deletion). */