feat: implement StatusDot component for status indicators in approvals and agents

frontend/src/app/boards/[boardId]/page.tsx

@@ -20,6 +20,7 @@ import {
 } from "lucide-react";
 
 import { Markdown } from "@/components/atoms/Markdown";
+import { StatusDot } from "@/components/atoms/StatusDot";
 import { DashboardSidebar } from "@/components/organisms/DashboardSidebar";
 import { TaskBoard } from "@/components/organisms/TaskBoard";
 import { DashboardShell } from "@/components/templates/DashboardShell";
@@ -2425,14 +2426,12 @@ export default function BoardDetailPage() {
                         >
                           <div className="relative flex h-9 w-9 items-center justify-center rounded-full bg-slate-100 text-xs font-semibold text-slate-700">
                             {agentAvatarLabel(agent)}
-                            <span
+                            <StatusDot
+                              status={agent.status}
+                              variant="agent"
                               className={cn(
                                 "absolute -right-0.5 -bottom-0.5 h-2.5 w-2.5 rounded-full border-2 border-white",
-                                isWorking
-                                  ? "bg-emerald-500"
-                                  : agent.status === "online"
-                                    ? "bg-green-500"
-                                    : "bg-slate-300",
+                                isWorking && "ring-2 ring-emerald-200",
                               )}
                             />
                           </div>

frontend/src/components/BoardApprovalsPanel.tsx

@@ -16,6 +16,7 @@ import {
   useUpdateApprovalApiV1BoardsBoardIdApprovalsApprovalIdPatch,
 } from "@/api/generated/approvals/approvals";
 import type { ApprovalRead } from "@/api/generated/model";
+import { StatusDot } from "@/components/atoms/StatusDot";
 import {
   ChartContainer,
   ChartTooltip,
@@ -85,12 +86,6 @@ const humanizeAction = (value: string) =>
 const formatStatusLabel = (status: string) =>
   status.replace(/_/g, " ").replace(/\b\w/g, (char) => char.toUpperCase());
 
-const statusDotClass = (status: string) => {
-  if (status === "approved") return "bg-emerald-500";
-  if (status === "rejected") return "bg-rose-500";
-  return "bg-amber-500";
-};
-
 const rubricColors = [
   "#0f172a",
   "#1d4ed8",
@@ -584,10 +579,11 @@ export function BoardApprovalsPanel({
                     </div>
 
                     <div className="flex items-center gap-3 rounded-lg border border-slate-200 bg-slate-50 px-4 py-3">
-                      <span
+                      <StatusDot
+                        status={selectedApproval.status}
+                        variant="approval"
                         className={cn(
                           "h-2 w-2 rounded-full",
-                          statusDotClass(selectedApproval.status),
                         )}
                       />
                       <div>

frontend/src/components/atoms/StatusDot.tsx

@@ -0,0 +1,77 @@
+import { cn } from "@/lib/utils";
+
+type StatusDotVariant = "agent" | "approval" | "task";
+
+const AGENT_STATUS_DOT_CLASS_BY_STATUS: Record<string, string> = {
+  online: "bg-emerald-500",
+  busy: "bg-amber-500",
+  provisioning: "bg-amber-500",
+  updating: "bg-sky-500",
+  deleting: "bg-rose-500",
+  offline: "bg-slate-400",
+};
+
+const APPROVAL_STATUS_DOT_CLASS_BY_STATUS: Record<string, string> = {
+  approved: "bg-emerald-500",
+  rejected: "bg-rose-500",
+  pending: "bg-amber-500",
+};
+
+const TASK_STATUS_DOT_CLASS_BY_STATUS: Record<string, string> = {
+  inbox: "bg-slate-400",
+  in_progress: "bg-purple-500",
+  review: "bg-indigo-500",
+  done: "bg-emerald-500",
+};
+
+const STATUS_DOT_CLASS_BY_VARIANT: Record<
+  StatusDotVariant,
+  Record<string, string>
+> = {
+  agent: AGENT_STATUS_DOT_CLASS_BY_STATUS,
+  approval: APPROVAL_STATUS_DOT_CLASS_BY_STATUS,
+  task: TASK_STATUS_DOT_CLASS_BY_STATUS,
+};
+
+const DEFAULT_STATUS_DOT_CLASS: Record<StatusDotVariant, string> = {
+  agent: "bg-slate-300",
+  approval: "bg-amber-500",
+  task: "bg-slate-300",
+};
+
+export const statusDotClass = (
+  status: string | null | undefined,
+  variant: StatusDotVariant = "agent",
+) => {
+  const normalized = (status ?? "").trim().toLowerCase();
+  if (!normalized) {
+    return DEFAULT_STATUS_DOT_CLASS[variant];
+  }
+  return (
+    STATUS_DOT_CLASS_BY_VARIANT[variant][normalized] ??
+    DEFAULT_STATUS_DOT_CLASS[variant]
+  );
+};
+
+type StatusDotProps = {
+  status?: string | null;
+  variant?: StatusDotVariant;
+  className?: string;
+};
+
+export function StatusDot({
+  status,
+  variant = "agent",
+  className,
+}: StatusDotProps) {
+  return (
+    <span
+      aria-hidden="true"
+      className={cn(
+        "inline-block h-2.5 w-2.5 rounded-full",
+        statusDotClass(status, variant),
+        className,
+      )}
+    />
+  );
+}