feat: defer advanced build calculations

src/lib/components/isac/MechanicProgramEditor.svelte

@@ -793,7 +793,7 @@
 
 	<section class="scenario-panel">
 		<header><div><span>BUILDER CONTROLS</span><strong>SCENARIO ASSUMPTIONS</strong></div><button type="button" class="secondary compact-action" onclick={addScenarioInput}>ADD CONTROL ＋</button></header>
-		<p>These controls appear in a build’s advanced mechanic settings. Maximum Potential uses the best-case value; Custom Scenario uses the Agent’s saved value.</p>
+		<p>These controls are retained for the planned advanced build model. Maximum Potential will use the best-case value; Custom Scenario will use the Agent’s saved value.</p>
 		{#each rule.scenarioInputs as input, index}
 			<div class="scenario-row">
 				<label class="field">LABEL<input value={input.label} oninput={(event) => updateScenarioInput(index,{label:event.currentTarget.value,key:slug(event.currentTarget.value)})}/></label>