fix(hub): always send interrupt notice when card finalize fails

If StreamingAgentCard.finish cannot patch the live card, plain-text fallback
can still succeed with partial answer text. Interrupt is terminal — always
emit the explicit 已中断 notice when the card path failed so teachers see the
abort. Harden the integration assertion with waitFor.

hub/src/feishu/card/streaming-card.ts

@@ -173,17 +173,20 @@ export class StreamingAgentCard {
         );
       }
 
-      let updated = true;
+      let cardUpdated = true;
       if (answerText.length > 0 || segments.length > 0) {
-        updated = await this.flushCard("complete", answerText, isError, segments);
+        cardUpdated = await this.flushCard("complete", answerText, isError, segments);
       } else if (this.currentMessageId !== null) {
-        updated = await this.flushCard("complete", "", isError, []);
+        cardUpdated = await this.flushCard("complete", "", isError, []);
       }
-      if (!updated) {
+      if (!cardUpdated) {
         // Card path failed (e.g. residual content policy). Deliver text + standalone images.
-        updated = await this.deliverPlainFallback(segments, answerText);
+        await this.deliverPlainFallback(segments, answerText);
       }
-      if (!updated && this.interrupted) {
+      // Interrupt is terminal; if the live card could not be finalized, always
+      // send an explicit notice so the teacher sees the abort even when plain
+      // text partial delivery succeeded.
+      if (!cardUpdated && this.interrupted) {
         await sendText(this.rt, this.chatId, "\u5DF2\u4E2D\u65AD\u5F53\u524D\u8FD0\u884C\u3002", this.sendOptions);
       }
     } finally {

hub/test/integration/trigger.test.ts

@@ -1611,8 +1611,10 @@ describe("trigger full lifecycle (integration)", () => {
       expect(runs[0]?.status).toBe("CANCELED");
     });
     expect(patch).toHaveBeenCalled();
+    await vi.waitFor(() => {
       expect(rt.sentTexts).toContain("已中断当前运行。");
     });
+  });
 
   it("denies interrupt when the operator lacks agent.cancel permission", async () => {
     // EDIT role can trigger but cannot cancel (agent.cancel requires MANAGE).