Fix clearing of codegen session

This regressed recently in a refactor.

Author: mtsgrd

apps/desktop/src/components/StackView.svelte

@@ -330,6 +330,7 @@
 	const isStackActiveQuery = $derived(claudeCodeService.isStackActive(projectId, stackId));
 	const isStackActive = $derived(isStackActiveQuery?.response || false);
 	const events = $derived(claudeCodeService.messages({ projectId, stackId }));
+	const sessionId = $derived(rulesService.aiSessionId(projectId, stackId));
 	const hasRulesToClear = $derived(rulesService.hasRulesToClear(projectId, stackId));
 	const permissionRequests = $derived(claudeCodeService.permissionRequests({ projectId }));
 	const attachments = $derived(attachmentService.getByBranch(branchName));
@@ -678,6 +679,7 @@
 							permissionRequests={permissionRequests.response || []}
 							onSubmit={sendMessage}
 							onChange={(prompt) => messageSender?.setPrompt(prompt)}
+							sessionId={sessionId.response}
 							{isStackActive}
 							{hasRulesToClear}
 						/>

apps/desktop/src/lib/rules/rulesService.svelte.ts

@@ -61,6 +61,24 @@ export default class RulesService {
 		);
 	}
 
+	aiSessionId(projectId: string, stackId?: string) {
+		return this.api.endpoints.listWorkspaceRules.useQuery(
+			{ projectId },
+			{
+				transform: (result) => {
+					const allRules = workspaceRulesSelectors.selectAll(result);
+					const rule = allRules.find(
+						(r) => isAiRule(r) && r.action.subject.subject.target.subject === stackId
+					);
+					const sessionId = rule?.filters.at(0)?.subject;
+					if (typeof sessionId === 'string') {
+						return sessionId;
+					}
+				}
+			}
+		);
+	}
+
 	async fetchListWorkspaceRules(projectId: string) {
 		return await this.api.endpoints.listWorkspaceRules.fetch(
 			{ projectId },