fix: correct hardcoded True to stream variable in display_generating logic

Fixed critical bug where (not True and self.verbose) was always False,
preventing display_generating from ever being called in one code path.
Changed to (not stream and self.verbose) to match intended logic.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Mervin Praison <MervinPraison@users.noreply.github.com>

Author: github-actions[bot]

src/praisonai-agents/praisonaiagents/agent/agent.py

@@ -1070,7 +1070,7 @@ def _process_stream_response(self, messages, temperature, start_time, formatted_
             tools=formatted_tools,
             start_time=start_time,
             console=self.console,
-            display_fn=display_generating if (not True and self.verbose) else None,  # stream is True in this context
+            display_fn=display_generating if (not stream and self.verbose) else None,  # stream is True in this context
             reasoning_steps=reasoning_steps
         )