feat(23-02): add ChatTaskCreatedBadge, ChatStatusUpdateBadge, useBrainstormerDefault

- ChatTaskCreatedBadge renders loading state and resolved badge with View task link
- ChatStatusUpdateBadge renders CheckCircle2 + agent completion text with task link
- useBrainstormerDefault returns general role agent ID with React Query deduplication
- Fix ChatMessageList synthetic streaming entry to include messageType: null

ui/src/components/ChatMessageList.tsx

@@ -44,6 +44,7 @@ export function ChatMessageList({
           role: "assistant" as const,
           content: streamingContent,
           agentId: null,
+          messageType: null,
           createdAt: new Date().toISOString(),
           updatedAt: null,
           isStreamingEntry: true,

ui/src/components/ChatStatusUpdateBadge.tsx

@@ -0,0 +1,40 @@
+import { Link } from "@/lib/router";
+import { CheckCircle2 } from "lucide-react";
+import { cn } from "../lib/utils";
+
+interface ChatStatusUpdateBadgeProps {
+  agentName: string;
+  taskId: string;
+  taskTitle?: string;
+  taskUrl?: string;
+}
+
+export function ChatStatusUpdateBadge({ agentName, taskId, taskTitle, taskUrl }: ChatStatusUpdateBadgeProps) {
+  const displayTitle =
+    taskTitle && taskTitle.length > 40 ? taskTitle.slice(0, 40) + "..." : taskTitle;
+
+  return (
+    <div
+      className={cn(
+        "motion-safe:animate-in motion-safe:fade-in motion-safe:slide-in-from-bottom-1",
+        "inline-flex items-center gap-2 rounded-md border border-border bg-card px-3 py-1 text-[13px]"
+      )}
+      role="status"
+    >
+      <CheckCircle2 className="h-3.5 w-3.5 text-green-500 dark:text-green-400" />
+      <span className="text-foreground">
+        {agentName} completed {taskId}
+        {displayTitle ? `: ${displayTitle}` : ""}
+      </span>
+      {taskUrl && (
+        <Link
+          to={taskUrl}
+          className="text-primary underline-offset-2 hover:underline"
+          aria-label={`View task ${taskId}`}
+        >
+          View task
+        </Link>
+      )}
+    </div>
+  );
+}

ui/src/components/ChatTaskCreatedBadge.tsx

@@ -0,0 +1,40 @@
+import { Link } from "@/lib/router";
+import { cn } from "../lib/utils";
+
+interface ChatTaskCreatedBadgeProps {
+  taskId?: string | null;
+  taskTitle?: string | null;
+  taskUrl?: string | null;
+}
+
+export function ChatTaskCreatedBadge({ taskId, taskTitle, taskUrl }: ChatTaskCreatedBadgeProps) {
+  if (!taskId) {
+    return (
+      <div className="motion-safe:animate-in motion-safe:fade-in motion-safe:slide-in-from-bottom-1 inline-flex items-center gap-2 rounded-md border border-border bg-card px-3 py-1 text-[13px] text-muted-foreground">
+        Creating task...
+      </div>
+    );
+  }
+
+  return (
+    <div
+      className={cn(
+        "motion-safe:animate-in motion-safe:fade-in motion-safe:slide-in-from-bottom-1",
+        "inline-flex items-center gap-2 rounded-md border border-border bg-card px-3 py-1 text-[13px]"
+      )}
+      role="status"
+    >
+      <span className="text-[11px] font-semibold text-muted-foreground">{taskId}</span>
+      <span className="text-foreground">{taskTitle}</span>
+      {taskUrl && (
+        <Link
+          to={taskUrl}
+          className="text-primary underline-offset-2 hover:underline"
+          aria-label={`View task ${taskId}`}
+        >
+          View task
+        </Link>
+      )}
+    </div>
+  );
+}

ui/src/hooks/useBrainstormerDefault.ts

@@ -0,0 +1,21 @@
+import { useQuery } from "@tanstack/react-query";
+import type { Agent } from "@paperclipai/shared";
+import { agentsApi } from "../api/agents";
+import { useCompany } from "../context/CompanyContext";
+
+export function useBrainstormerDefault(): string | null {
+  const { selectedCompanyId } = useCompany();
+
+  const { data: agents = [] } = useQuery<Agent[]>({
+    queryKey: ["agents", selectedCompanyId],
+    queryFn: () => agentsApi.list(selectedCompanyId!),
+    enabled: !!selectedCompanyId,
+  });
+
+  // Reuses same queryKey as ChatPanel's agent list — React Query deduplicates
+  const generalAgent = agents
+    .filter((a) => a.role === "general")
+    .sort((a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime())[0];
+
+  return generalAgent?.id ?? null;
+}