fix(cli): defer response content until reasoning block completes (#5773)

When show_reasoning is on with streaming, content tokens could arrive
while the reasoning box was still rendering (interleaved thinking mode).
This caused the response box to open before reasoning finished, resulting
in reasoning appearing after the response in the terminal.

Fix: buffer content in _deferred_content while _reasoning_box_opened is
True. Flush the buffer through _emit_stream_text when _close_reasoning_box
runs, ensuring reasoning always renders before the response.

cli.py

@@ -1920,6 +1920,12 @@ class HermesCLI:
             _cprint(f"{_DIM}└{'─' * (w - 2)}┘{_RST}")
             self._reasoning_box_opened = False
 
+            # Flush any content that was deferred while reasoning was rendering.
+            deferred = getattr(self, "_deferred_content", "")
+            if deferred:
+                self._deferred_content = ""
+                self._emit_stream_text(deferred)
+
     def _stream_delta(self, text) -> None:
         """Line-buffered streaming callback for real-time token rendering.
 
@@ -2022,6 +2028,13 @@ class HermesCLI:
         if not text:
             return
 
+        # When show_reasoning is on and reasoning is still rendering,
+        # defer content until the reasoning box closes.  This ensures the
+        # reasoning block always appears BEFORE the response in the terminal.
+        if self.show_reasoning and getattr(self, "_reasoning_box_opened", False):
+            self._deferred_content = getattr(self, "_deferred_content", "") + text
+            return
+
         # Close the live reasoning box before opening the response box
         self._close_reasoning_box()
 
@@ -2088,6 +2101,7 @@ class HermesCLI:
         self._reasoning_box_opened = False
         self._reasoning_buf = ""
         self._reasoning_preview_buf = ""
+        self._deferred_content = ""
 
     def _slow_command_status(self, command: str) -> str:
         """Return a user-facing status message for slower slash commands."""