feat(app): real daemon health footer (live, uptime, version)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src-tauri/src/bridge.rs

@@ -311,3 +311,8 @@ pub async fn mark_read(state: BridgeState<'_>, target: Value) -> Result<Value, S
     let target: spacesh_proto::MarkReadTarget = serde_json::from_value(target).map_err(|e| format!("invalid mark_read target: {e}"))?;
     data_of(state.request(Cmd::MarkRead { target }).await.map_err(|e| e.to_string())?)
 }
+
+#[tauri::command]
+pub async fn health(state: BridgeState<'_>) -> Result<Value, String> {
+    data_of(state.request(Cmd::Health).await.map_err(|e| e.to_string())?)
+}

app/src-tauri/src/lib.rs

@@ -51,6 +51,7 @@ pub fn run() {
             bridge::focus,
             bridge::event_log,
             bridge::mark_read,
+            bridge::health,
         ])
         .run(tauri::generate_context!())
         .expect("error while running spacesh");