feat(tui): implement agent turn engine for background processing and enhance input handling

apps/infrastructure/src/tools/lsp/diagnostics.rs

@@ -36,7 +36,13 @@ impl Tool for LspDiagnostics {
         let language = crate::tools::arg_str(args, "language")?;
         let path = crate::tools::arg_str(args, "path")?;
 
-        let manager = ctx.lsp_manager.lock().unwrap();
+        let manager = match ctx.lsp_manager.lock() {
+            Ok(g) => g,
+            Err(poisoned) => {
+                tracing::error!("LSP manager mutex poisoned, recovering");
+                poisoned.into_inner()
+            }
+        };
         if let Some(client) = manager.get_client(&language) {
             let result = client.send_request("textDocument/diagnostic", &json!({
                 "textDocument": { "uri": format!("file://{}", path) }