fix(cli): hold agent status lines until the streamed response box closes

Subagent completion notices ("✓ [set 7 · 2/2] … (2175.14s)"), background
process notices and spinner print_above text are emitted from worker threads
through agent._print_fn. In the interactive CLI that was bound straight to
_cprint, so a notice landing while a reply streamed was printed between two
paragraphs inside the response box.

_print_fn is now HermesCLI._agent_status_print: while a response or reasoning
box is open the line is parked in _held_status_lines and released right after
the box footer; outside a box it prints immediately as before. Gateway, ACP
and TUI printers are untouched (they never bound _cprint).

cli.py

@@ -2619,7 +2619,8 @@ class HermesCLI(CLIProcessNotificationsMixin, CLIAgentSetupMixin, CLICommandsMix
         # Streaming display state
         self._stream_buf = ""  # partial line buffer
         self._reasoning_preview_buf = ""  # coalesces tiny reasoning chunks
-        self._stream_started = self._stream_box_opened = False
+        self._stream_started = self._stream_box_opened = self._stream_box_live = False
+        self._held_status_lines: list[str] = []  # agent status lines parked while a box streams
         # Possible markdown-table lines held until the block ends for wcwidth-aware re-padding.
         self._stream_table_buf: list[str] = []
         self._in_stream_table = False