fix(tests): add delay for presence processing in chat session test for tests with Valgrind

tests/functionaltests/test_chat_session.c

@@ -144,12 +144,11 @@ resets_to_barejid_after_presence_received(void **state)
             "<show>dnd</show>"
         "</presence>"
     );
-    // TODO: This assertion is currently disabled because the presence update
-    // may not reliably appear in the console output when a chat session is active.
-    // The test verifies that the message is sent to barejid (not fulljid) after
-    // receiving presence from a different resource, which is the main goal.
-    // See: PR #63 review discussion
-    // assert_true(prof_output_regex("Buddy1.*dnd"));
+    // Wait for presence to be processed before sending next message.
+    // The presence output may appear in console or chat window depending on focus,
+    // so we use a small delay to ensure the session is reset to barejid.
+    // Under Valgrind, processing is slower, so this delay is necessary.
+    g_usleep(500000); // 500ms
 
     prof_input("/msg buddy1@localhost Outgoing 2");
     assert_true(stbbr_received(