fix(webui): clarify aggregate turn token usage

webui/src/components/MessageBubble.tsx

@@ -192,9 +192,11 @@ function compactDuration(milliseconds: number): string {
 function TurnUsageMeta({
   usage,
   latencyMs,
+  contextWindowTokens,
 }: {
   usage: TurnUsage;
   latencyMs?: number;
+  contextWindowTokens?: number;
 }) {
   const { t } = useTranslation();
   const prompt = usage.prompt_tokens;
@@ -210,10 +212,26 @@ function TurnUsageMeta({
   ) {
     parts.push(`${Math.round(Math.min(1, usage.cached_tokens / prompt) * 100)}% cached`);
   }
+  if (typeof usage.request_count === "number" && usage.request_count > 1) {
+    parts.push(t("message.usage.requests", {
+      count: usage.request_count,
+      defaultValue: "{{count}} calls this turn",
+    }));
+  }
   if (typeof latencyMs === "number" && latencyMs >= 0) parts.push(compactDuration(latencyMs));
   if (parts.length === 0) return null;
 
   const details: string[] = [];
+  if (typeof usage.context_tokens === "number" && usage.context_tokens >= 0) {
+    const capacity = typeof contextWindowTokens === "number" && contextWindowTokens > 0
+      ? ` / ${formatCompactTokenCount(contextWindowTokens)}`
+      : "";
+    details.push(t("message.usage.context", {
+      tokens: `${approximate}${formatCompactTokenCount(usage.context_tokens)}`,
+      capacity,
+      defaultValue: "Context now: {{tokens}}{{capacity}}",
+    }));
+  }
   if (approximate) {
     details.push(t("message.usage.estimated", { defaultValue: "Includes estimated usage" }));
   }
@@ -621,6 +639,7 @@ export function MessageBubble({
               <TurnUsageMeta
                 usage={message.usage!}
                 latencyMs={message.latencyMs}
+                contextWindowTokens={message.contextWindowTokens}
               />
             ) : null}
             {showAssistantTimestamp ? (

webui/src/tests/message-bubble.test.tsx

@@ -1013,7 +1013,7 @@ describe("MessageBubble", () => {
     expect(screen.queryByLabelText("File attachment")).not.toBeInTheDocument();
   });
 
-  it("keeps turn usage focused on the completed reply", () => {
+  it("distinguishes aggregate turn usage from the latest context", () => {
     const message: UIMessage = {
       id: "a-usage",
       role: "assistant",
@@ -1032,10 +1032,13 @@ describe("MessageBubble", () => {
 
     render(<MessageBubble message={message} />);
 
-    const usage = screen.getByText("12.4K in · 823 out · 78% cached · 18s");
+    const usage = screen.getByText("12.4K in · 823 out · 78% cached · 3 calls this turn · 18s");
     expect(usage).toHaveAttribute("data-turn-usage");
-    expect(usage).not.toHaveAttribute("tabindex");
-    expect(screen.queryByRole("tooltip")).not.toBeInTheDocument();
+    expect(usage).toHaveAttribute("tabindex", "0");
+
+    fireEvent.focus(usage);
+
+    expect(screen.getByRole("tooltip")).toHaveTextContent("Context now: 8.1K / 128K");
   });
 
   it("marks estimated usage and omits cache when the provider did not report it", () => {