fix: review findings — multi-turn history, race condition, collapse UI

- Core: toCoreMessages now includes tool calls and tool results in history
- Core: isError read from step tool results instead of hardcoded false
- API: status set synchronously before async generator to prevent race
- Frontend: DaisyUI collapse-open class applied dynamically on expanded state
- Frontend: removed duplicate isConnected update in wsClient.onEvent

4 files changed, 12 insertions, 7 deletions

diff --git a/packages/api/src/agent-manager.ts b/packages/api/src/agent-manager.ts
index 2991ee1..45e195c 100644
--- a/packages/api/src/agent-manager.ts
+++ b/packages/api/src/agent-manager.ts
@@ -69,6 +69,7 @@ export class AgentManager {
 	async processMessage(message: string): Promise<void> {
 		const agent = this.getOrCreateAgent();
 
+		this.status = "running";
 		this.messageCount += 1;
 
 		try {
diff --git a/packages/core/src/agent/agent.ts b/packages/core/src/agent/agent.ts
index a20a4ce..c28d691 100644
--- a/packages/core/src/agent/agent.ts
+++ b/packages/core/src/agent/agent.ts
@@ -17,7 +17,14 @@ function toCoreMessages(messages: ChatMessage[]): CoreMessage[] {
 		if (msg.role === "user") {
 			result.push({ role: "user", content: msg.content });
 		} else if (msg.role === "assistant") {
-			result.push({ role: "assistant", content: msg.content });
+			const parts: Array<{ type: "text"; text: string } | { type: "tool-call"; toolCallId: string; toolName: string; args: Record<string, unknown> }> = [{ type: "text", text: msg.content }];
+			for (const tc of msg.toolCalls ?? []) {
+				parts.push({ type: "tool-call", toolCallId: tc.id, toolName: tc.name, args: tc.arguments });
+			}
+			result.push({ role: "assistant", content: parts });
+			for (const tr of msg.toolResults ?? []) {
+				result.push({ role: "tool", content: [{ type: "tool-result", toolCallId: tr.toolCallId, toolName: "", result: tr.result }] });
+			}
 		}
 	}
 	return result;
@@ -108,12 +115,13 @@ export class Agent {
 				const stepToolResults = step.toolResults as unknown as Array<{
 					toolCallId: string;
 					result: unknown;
+					isError?: boolean;
 				}>;
 				for (const tr of stepToolResults) {
 					const toolResult: ToolResult = {
 						toolCallId: tr.toolCallId,
 						result: typeof tr.result === "string" ? tr.result : JSON.stringify(tr.result),
-						isError: false,
+						isError: tr.isError ?? false,
 					};
 					toolResults.push(toolResult);
 					yield { type: "tool-result", toolResult };
diff --git a/packages/frontend/src/lib/chat.svelte.ts b/packages/frontend/src/lib/chat.svelte.ts
index e5367c2..fc5f68c 100644
--- a/packages/frontend/src/lib/chat.svelte.ts
+++ b/packages/frontend/src/lib/chat.svelte.ts
@@ -66,10 +66,6 @@ function createChatStore() {
 	let currentAssistantId: string | null = null;
 
 	wsClient.onEvent((event) => {
-		const connected = wsClient.connectionStatus === "connected";
-		if (connected !== isConnected) {
-			isConnected = connected;
-		}
 		handleEvent(event);
 	});
 
diff --git a/packages/frontend/src/lib/components/ToolCallDisplay.svelte b/packages/frontend/src/lib/components/ToolCallDisplay.svelte
index f8e1f38..83d21ba 100644
--- a/packages/frontend/src/lib/components/ToolCallDisplay.svelte
+++ b/packages/frontend/src/lib/components/ToolCallDisplay.svelte
@@ -10,7 +10,7 @@ function toggle() {
 }
 </script>
 
-<div class="collapse collapse-arrow bg-base-200 my-1 rounded-lg border border-base-300">
+<div class="collapse collapse-arrow bg-base-200 my-1 rounded-lg border border-base-300 {isExpanded ? 'collapse-open' : ''}">
 	<button
 		type="button"
 		class="collapse-title flex items-center gap-2 text-sm font-medium cursor-pointer w-full text-left"