fix(hub): stamp CheckMark/CrossMark when agent run finishes (v0.0.41)

After removing the Typing reaction, add CheckMark on success or CrossMark
on failure so teachers can see completion on the source message without
opening the card.

hub/test/unit/feishu-reactions.test.ts

@@ -52,7 +52,7 @@ describe("Feishu reactions", () => {
     await expect(removeReaction(rt, "message-1", "reaction-1")).resolves.toBe(false);
   });
 
-  it("adds Typing on start and removes it on success", async () => {
+  it("adds Typing on start and replaces it with CheckMark on success", async () => {
     const run = deferred<RunResult>();
     const rt = mockRuntime();
     const runAgent = vi.fn((req: RunRequest) => {
@@ -71,6 +71,7 @@ describe("Feishu reactions", () => {
       expect(rt.reactionRequests).toEqual([
         { kind: "add", messageId: "message-1", emoji: "Typing", reactionId: "reaction-1" },
         { kind: "remove", messageId: "message-1", reactionId: "reaction-1" },
+        { kind: "add", messageId: "message-1", emoji: "CheckMark", reactionId: "reaction-2" },
       ]);
     });
   });