Feishu: normalize group slash command probing

- Feishu/group slash command detection: normalize group mention wrappers before command-authorization probing so mention-prefixed commands are recognized in group routing.\n- Source PR: #36011\n- Contributor: @liuxiaopai-ai\n\nCo-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>\nCo-authored-by: liuxiaopai-ai <73659136+liuxiaopai-ai@users.noreply.github.com>

extensions/feishu/src/bot.test.ts

@@ -521,6 +521,42 @@ describe("handleFeishuMessage command authorization", () => {
     );
   });
 
+  it("normalizes group mention-prefixed slash commands before command-auth probing", async () => {
+    mockShouldComputeCommandAuthorized.mockReturnValue(true);
+
+    const cfg: ClawdbotConfig = {
+      channels: {
+        feishu: {
+          groups: {
+            "oc-group": {
+              requireMention: false,
+            },
+          },
+        },
+      },
+    } as ClawdbotConfig;
+
+    const event: FeishuMessageEvent = {
+      sender: {
+        sender_id: {
+          open_id: "ou-attacker",
+        },
+      },
+      message: {
+        message_id: "msg-group-mention-command-probe",
+        chat_id: "oc-group",
+        chat_type: "group",
+        message_type: "text",
+        content: JSON.stringify({ text: "@_user_1/model" }),
+        mentions: [{ key: "@_user_1", id: { open_id: "ou-bot" }, name: "Bot", tenant_key: "" }],
+      },
+    };
+
+    await dispatchMessage({ cfg, event });
+
+    expect(mockShouldComputeCommandAuthorized).toHaveBeenCalledWith("/model", cfg);
+  });
+
   it("falls back to top-level allowFrom for group command authorization", async () => {
     mockShouldComputeCommandAuthorized.mockReturnValue(true);
     mockResolveCommandAuthorizedFromAuthorizers.mockReturnValue(true);