fix(hub): send Feishu files explicitly

hub/test/unit/text-stream.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from "vitest";
+import { PatchableTextStream } from "../../src/feishu/textStream.js";
+
+describe("PatchableTextStream", () => {
+  it("creates only one initial message when deltas arrive while create is pending", async () => {
+    const creates: string[] = [];
+    const patches: string[] = [];
+    let resolveCreate: ((id: string) => void) | undefined;
+    const firstCreate = new Promise<string>((resolve) => {
+      resolveCreate = resolve;
+    });
+    const stream = new PatchableTextStream(
+      {
+        create: async (text) => {
+          creates.push(text);
+          return firstCreate;
+        },
+        patch: async (_messageId, text) => {
+          patches.push(text);
+        },
+      },
+      { patchIntervalMs: 0 },
+    );
+
+    stream.append("我目前运行在");
+    await Promise.resolve();
+    stream.append(" Claude Sonnet");
+    resolveCreate?.("msg-1");
+    await stream.finish("我目前运行在 Claude Sonnet");
+
+    expect(creates).toEqual(["我目前运行在"]);
+    expect(patches.at(-1)).toBe("我目前运行在 Claude Sonnet");
+  });
+
+  it("sends a fallback message when no stream delta arrived", async () => {
+    const creates: string[] = [];
+    const stream = new PatchableTextStream({
+      create: async (text) => {
+        creates.push(text);
+        return "msg-1";
+      },
+      patch: async () => {},
+    });
+
+    await stream.finish("完整回复");
+
+    expect(creates).toEqual(["完整回复"]);
+  });
+});