feat: set branch summary on predicate gen (#3212)

frontend/src/lib/components/copilot/PredicateGen.svelte

@@ -71,6 +71,7 @@ Only return the expression without any wrapper. Do not explain or discuss.`
 			)
 
 			dispatch('setExpr', result)
+			dispatch('updateSummary', instructions)
 		} catch (err) {
 			if (!abortController.signal.aborted) {
 				sendUserToast('Could not generate summary: ' + err, true)

frontend/src/lib/components/flows/content/BranchPredicateEditor.svelte

@@ -65,6 +65,7 @@
 					on:setExpr={(e) => {
 						branch.expr = e.detail
 					}}
+					on:updateSummary
 					pickableProperties={stepPropPicker.pickableProperties}
 				/>
 			{/if}

frontend/src/lib/components/flows/content/FlowBranchOneWrapper.svelte

@@ -22,7 +22,17 @@
 		</div>
 		<div class="overflow-hidden flex-grow">
 			<h3 class="p-2">Predicate expression</h3>
-			<BranchPredicateEditor {branch} {parentModule} {previousModule} {enableAi} />
+			<BranchPredicateEditor
+				{branch}
+				{parentModule}
+				{previousModule}
+				{enableAi}
+				on:updateSummary={(e) => {
+					if (!branch.summary) {
+						branch.summary = e.detail
+					}
+				}}
+			/>
 		</div>
 	</FlowCard>
 </div>

frontend/src/lib/components/flows/content/FlowBranchesOneWrapper.svelte

@@ -68,6 +68,11 @@
 									<div class="w-full border">
 										<BranchPredicateEditor
 											{branch}
+											on:updateSummary={(e) => {
+												if (!branch.summary) {
+													branch.summary = e.detail
+												}
+											}}
 											parentModule={flowModule}
 											{previousModule}
 											{enableAi}