fix(mq): hide new-query entry for message queue connections

apps/desktop/src/lib/__tests__/database/databaseFeatureSupport.spec.ts

@@ -98,6 +98,21 @@ describe("connection query actions", () => {
     expect(supportsConnectionQueryActions("hbase")).toBe(false);
     expect(supportsConnectionQueryActions("zookeeper")).toBe(false);
   });
+
+  it("hides the sidebar new-query entry for message brokers", () => {
+    // Kafka/Pulsar/RocketMQ/RabbitMQ all share db_type "mq" and have no SQL
+    // engine: the sidebar entry opened a plain SQL editor against a broker
+    // (issue #8415). MQTT has the same console-only surface.
+    expect(supportsConnectionQueryActions("mq")).toBe(false);
+    expect(supportsConnectionQueryActions("mqtt")).toBe(false);
+  });
+});
+
+describe("message queue query capabilities", () => {
+  it("does not advertise query execution for broker surfaces", () => {
+    expect(supportsQueryExecution("mq")).toBe(false);
+    expect(supportsQueryExecution("mqtt")).toBe(false);
+  });
 });
 
 describe("zookeeper query capabilities", () => {

apps/desktop/src/lib/database/databaseFeatureSupport.ts

@@ -117,9 +117,14 @@ export function supportsClearableQuerySchema(dbType?: DatabaseType): boolean {
  * so the sidebar "new query" flow would call list-databases and fail
  * (issue #8215). It is excluded alongside the other specialized surfaces
  * (nacos, consul, hbase) whose connection workbench replaces query tabs.
+ *
+ * The message-queue surfaces (`mq` — Pulsar/Kafka/RocketMQ/RabbitMQ — and
+ * `mqtt`) belong to the same group: brokers have no SQL engine, and their
+ * workbench is the MQ/MQTT admin tab. The sidebar entry used to open a plain
+ * SQL editor against a broker (issue #8415).
  */
 export function supportsConnectionQueryActions(dbType?: DatabaseType): boolean {
-  return dbType !== "nacos" && dbType !== "consul" && dbType !== "hbase" && dbType !== "zookeeper";
+  return dbType !== "nacos" && dbType !== "consul" && dbType !== "hbase" && dbType !== "zookeeper" && dbType !== "mq" && dbType !== "mqtt";
 }
 
 /**