diff --git a/src-tauri/src/commands/system.rs b/src-tauri/src/commands/system.rs
index 55c17d60..f20cbc61 100644
--- a/src-tauri/src/commands/system.rs
+++ b/src-tauri/src/commands/system.rs
@@ -626,4 +626,17 @@ mod updater_tests {
         assert!(!is_newer_version("", "1.0.0"));
         assert!(!is_newer_version("1.0.0", ""));
     }
+
+    #[test]
+    fn test_update_channel_default() {
+        let settings = AppSettings::default();
+        assert_eq!(settings.update_channel, "stable");
+    }
+
+    #[test]
+    fn test_update_channel_serialization() {
+        let settings = AppSettings::default();
+        let json = serde_json::to_string(&settings).unwrap();
+        assert!(json.contains("\"stable\""));
+    }
 }
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 4f3d3403..93a95a18 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -256,6 +256,10 @@ pub fn run() {
             commands::system::get_sudo_config_status,
             commands::system::test_sudo_password,
             commands::system::clear_sudo_password,
+            commands::system::check_app_updates,
+            commands::system::install_app_updates,
+            commands::system::get_update_channel,
+            commands::system::set_update_channel,
             // MCP Servers
             mcp::commands::list_mcp_servers,
             mcp::commands::create_mcp_server,