Restore campaign terminology across UI and docs

src/lib/ui/components/BetaPlanBuilder.svelte

@@ -31,7 +31,7 @@
         ?? presets.find(p => JSON.stringify(p.plan) === JSON.stringify(plan)));
     const savedPresets = $derived(presets.filter(p => !builtInPlans.some(b => b.name === p.name)));
     const failureSummary = $derived(plan.failureAction === 'fail' ? 'Fail and hold for review' : plan.failureAction === 'pause' ? 'Pause for investigation' : 'Roll back automatically');
-    const rolloutSummary = $derived(plan.waveSize ? `${plan.waveSize} server${plan.waveSize === 1 ? '' : 's'} per wave` : 'Deploy to all selected servers');
+    const waveSummary = $derived(plan.waveSize ? `${plan.waveSize} server${plan.waveSize === 1 ? '' : 's'} per wave` : 'Deploy to all selected servers');
 
     async function loadPresets() {
         const response = await fetch('/api/betas/presets');
@@ -175,7 +175,7 @@
 
     <div class="policy-settings">
         <details class="policy" bind:open={coverageOpen}>
-            <summary><span>Coverage &amp; rollout<small>{coverageSummary(plan)} · {rolloutSummary}</small></span><span class="edit-hint">Configure</span></summary>
+            <summary><span>Coverage &amp; waves<small>{coverageSummary(plan)} · {waveSummary}</small></span><span class="edit-hint">Configure</span></summary>
             <div class="policy-body">
                 <div class="fields">
                     <label>Qualifying servers<select bind:value={plan.scope}>