feat(chaos): implement Tier 2 Integration Chaos for Memory, Networking, and LLM Gateway

tests/tui-tests.lisp

@@ -8,7 +8,13 @@
 
 (in-suite tui-suite)
 
-(test test-command-parser
-  "Verify that slash-commands are correctly identified."
-  ;; Stub for now
-  (is (null nil)))
+(test test-tui-connection-drop
+  "Tier 2 Chaos: Verify that handle-return degrades gracefully when the daemon connection is lost."
+  (let ((opencortex.tui::*chat-history* nil)
+        (opencortex.tui::*input-buffer* (make-array 5 :element-type 'char :initial-contents "hello" :fill-pointer 5 :adjustable t))
+        ;; Create a closed stream to simulate connection drop
+        (mock-stream (make-string-output-stream)))
+    (close mock-stream)
+    (opencortex.tui::handle-return mock-stream)
+    ;; Check if the error was enqueued to history instead of crashing
+    (is (member "ERROR: Connection to daemon lost." opencortex.tui::*chat-history* :test #'string=))))