feat(examples/tui): add TUI example with harmony integration

- Create `Cargo.toml` for the new TUI example under `examples/tui`
- Implement basic `main.rs` that initializes Maestro and launches the TUI
- Update `harmony_tui/src/lib.rs` to handle async score execution gracefully

harmony-rs/examples/tui/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "example-tui"
+edition = "2024"
+version.workspace = true
+readme.workspace = true
+license.workspace = true
+publish = false
+
+[dependencies]
+harmony = { path = "../../harmony" }
+harmony_tui = { path = "../../harmony_tui" }
+harmony_types = { path = "../../harmony_types" }
+cidr = { workspace = true }
+tokio = { workspace = true }
+harmony_macros = { path = "../../harmony_macros" }
+log = { workspace = true }
+env_logger = { workspace = true }
+url = { workspace = true }

harmony-rs/examples/tui/src/main.rs

@@ -0,0 +1,19 @@
+use harmony::{
+    inventory::Inventory,
+    maestro::Maestro,
+    modules::dummy::{ErrorScore, PanicScore, SuccessScore},
+    topology::HAClusterTopology,
+};
+
+#[tokio::main]
+async fn main() {
+    let inventory = Inventory::empty_inventory();
+    let topology = HAClusterTopology::dummy();
+    let mut maestro = Maestro::new(inventory, topology);
+    maestro.register_all(vec![
+        Box::new(SuccessScore {}),
+        Box::new(ErrorScore {}),
+        Box::new(PanicScore {}),
+    ]);
+    harmony_tui::init(maestro).await.unwrap();
+}

harmony-rs/harmony_tui/src/lib.rs

@@ -61,7 +61,7 @@ enum HarmonyTuiEvent {
 impl HarmonyTUI {
     pub fn new(maestro: Maestro) -> Self {
         let maestro = Arc::new(maestro);
-        let (handle, sender) = Self::start_channel(maestro.clone());
+        let (_handle, sender) = Self::start_channel(maestro.clone());
         let score = ScoreListWidget::new(Self::scores_list(&maestro), sender);
 
         HarmonyTUI {
@@ -83,14 +83,17 @@ impl HarmonyTUI {
                     HarmonyTuiEvent::LaunchScore(score_item) => {
                         let maestro = maestro.clone();
 
-                        let interpretation_result =
+                        let joinhandle_result =
                             tokio::spawn(async move { maestro.interpret(score_item.0).await })
                                 .await;
 
-                        match interpretation_result {
-                            Ok(success) => info!("Score execution successful {success:?}"),
-                            Err(e) => {
-                                error!("Score execution failed {:#?}", e);
+                        match joinhandle_result {
+                            Ok(interpretation_result) => match interpretation_result {
+                                Ok(success) => info!("Score execution successful {success:?}"),
+                                Err(error) => error!("Score failed {error:?}"),
+                            },
+                            Err(joinhandle_failure) => {
+                                error!("Score execution TASK FAILED! {:#?}", joinhandle_failure);
                             }
                         }
                     }