Mattermost: fix interaction action lookup sentinel

extensions/mattermost/src/mattermost/interactions.test.ts

@@ -610,4 +610,49 @@ describe("createMattermostInteractionHandler", () => {
     expect(res.statusCode).toBe(403);
     expect(res.body).toContain("Unknown action");
   });
+
+  it("accepts actions when the button name matches the action id", async () => {
+    const context = { action_id: "approve", __openclaw_channel_id: "chan-1" };
+    const token = generateInteractionToken(context, "acct");
+    const requestLog: Array<{ path: string; method?: string }> = [];
+    const handler = createMattermostInteractionHandler({
+      client: {
+        request: async (path: string, init?: { method?: string }) => {
+          requestLog.push({ path, method: init?.method });
+          if (init?.method === "PUT") {
+            return { id: "post-1" };
+          }
+          return {
+            channel_id: "chan-1",
+            message: "Choose",
+            props: {
+              attachments: [{ actions: [{ id: "approve", name: "approve" }] }],
+            },
+          };
+        },
+      } as unknown as MattermostClient,
+      botUserId: "bot",
+      accountId: "acct",
+    });
+
+    const req = createReq({
+      body: {
+        user_id: "user-1",
+        user_name: "alice",
+        channel_id: "chan-1",
+        post_id: "post-1",
+        context: { ...context, _token: token },
+      },
+    });
+    const res = createRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(200);
+    expect(res.body).toBe("{}");
+    expect(requestLog).toEqual([
+      { path: "/posts/post-1", method: undefined },
+      { path: "/posts/post-1", method: "PUT" },
+    ]);
+  });
 });

extensions/mattermost/src/mattermost/interactions.ts

@@ -380,7 +380,7 @@ export function createMattermostInteractionHandler(params: {
 
     const userName = payload.user_name ?? payload.user_id;
     let originalMessage = "";
-    let clickedButtonName = actionId;
+    let clickedButtonName: string | null = null;
     try {
       const originalPost = await client.request<{
         channel_id?: string | null;
@@ -412,7 +412,7 @@ export function createMattermostInteractionHandler(params: {
           break;
         }
       }
-      if (clickedButtonName === actionId) {
+      if (clickedButtonName === null) {
         log?.(`mattermost interaction: action ${actionId} not found in post ${payload.post_id}`);
         res.statusCode = 403;
         res.setHeader("Content-Type", "application/json");