feat(status-ui): improve concurrent session workflows

Add in-place session renewal, searchable model selection, clearer progress feedback, tool-result previews, and per-session presentation state.

Keep commands, errors, loading, and lifecycle indicators attached to their owning runtime so parallel tabs cannot interfere.

ui/src-tauri/src/lib.rs

@@ -217,6 +217,11 @@ async fn restart(agent_id: String) -> Result<(), String> {
     bridge::command(&socket_path()?, &agent_id, "restart").await
 }
 
+#[tauri::command]
+async fn renew_session(agent_id: String) -> Result<(), String> {
+    bridge::command(&socket_path()?, &agent_id, "renew_session").await
+}
+
 #[tauri::command]
 async fn set_model(agent_id: String, provider: String, model_id: String) -> Result<(), String> {
     bridge::set_model(&socket_path()?, &agent_id, &provider, &model_id).await
@@ -393,6 +398,7 @@ pub fn run() {
             abort,
             retry,
             restart,
+            renew_session,
             set_model,
             set_thinking_level,
             set_session_name,