feat(agent): add pressure trend demo

tests/routes/pressureTrendDemo.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it } from "bun:test";
+
+import {
+  createPressureTrendDemoEnvelopePayload,
+  createPressureTrendDemoToolCall,
+  isPressureTrendDemoPrompt,
+} from "../../src/routes/pressureTrendDemo.js";
+
+describe("pressure trend demo", () => {
+  it("matches the controlled demo prompt", () => {
+    expect(isPressureTrendDemoPrompt("展示最近压力趋势")).toBe(true);
+    expect(isPressureTrendDemoPrompt("请 展示 最近 压力 趋势")).toBe(true);
+    expect(isPressureTrendDemoPrompt("展示最近流量趋势")).toBe(false);
+  });
+
+  it("creates a show_chart tool call that maps to a chart UIEnvelope", () => {
+    const toolCall = createPressureTrendDemoToolCall();
+    const payload = createPressureTrendDemoEnvelopePayload("client-session-1", toolCall);
+
+    expect(toolCall.tool).toBe("show_chart");
+    expect(payload).toMatchObject({
+      session_id: "client-session-1",
+      envelope: {
+        kind: "chart",
+        schemaVersion: "agent-ui@1",
+        grammar: "echarts-safe-subset",
+        surface: "chat_inline",
+        spec: {
+          title: "最近压力趋势",
+          chart_type: "line",
+        },
+        data: {
+          x_data: ["10:00", "11:00", "12:00", "13:00", "14:00", "15:00"],
+        },
+      },
+    });
+  });
+});