feat: GPUI 版补齐 MQTTX 基础功能对标（分组/SSL证书/订阅增强/消息流控制/设置与日志）

Cargo.lock

@@ -4073,8 +4073,11 @@ dependencies = [
  "dirs 6.0.0",
  "gpui-kit",
  "hmac",
+ "rfd",
  "rumqttc-v4-next",
  "rumqttc-v5-next",
+ "rustls",
+ "rustls-native-certs",
  "serde",
  "serde_json",
  "sha1",
@@ -5673,6 +5676,33 @@ dependencies = [
  "zune-jpeg 0.5.15",
 ]
 
+[[package]]
+name = "rfd"
+version = "0.17.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20dafead71c16a34e1ff357ddefc8afc11e7d51d6d2b9fbd07eaa48e3e540220"
+dependencies = [
+ "block2 0.6.2",
+ "dispatch2",
+ "js-sys",
+ "libc",
+ "log",
+ "objc2 0.6.4",
+ "objc2-app-kit 0.3.2",
+ "objc2-core-foundation",
+ "objc2-foundation 0.3.2",
+ "percent-encoding",
+ "pollster 0.4.0",
+ "raw-window-handle",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wayland-backend",
+ "wayland-client",
+ "wayland-protocols",
+ "web-sys",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "rgb"
 version = "0.8.53"