fix(cli): gate tool-rendering paths with tool_progress_mode, not quiet_mode

quiet_mode was being used to suppress tool-result display when
tool_progress_mode was 'off'. But quiet_mode also gates operational
status messages, so users with /verbose + tool-progress off lost all
status output.

Adds a dedicated tool_progress_mode attribute to AIAgent; the
tool_executor result-rendering path gates on tool_progress_mode != 'off'.
The CLI passes its tool_progress_mode through agent setup and the
tool-progress cycle command syncs it onto the live agent.

Fixes #33860.

agent/agent_init.py

@@ -169,6 +169,7 @@ def init_agent(
     save_trajectories: bool = False,
     verbose_logging: bool = False,
     quiet_mode: bool = False,
+    tool_progress_mode: str = "all",
     ephemeral_system_prompt: str = None,
     log_prefix_chars: int = 100,
     log_prefix: str = "",
@@ -280,6 +281,7 @@ def init_agent(
     agent.save_trajectories = save_trajectories
     agent.verbose_logging = verbose_logging
     agent.quiet_mode = quiet_mode
+    agent.tool_progress_mode = tool_progress_mode
     agent.ephemeral_system_prompt = ephemeral_system_prompt
     agent.platform = platform  # "cli", "telegram", "discord", "whatsapp", etc.
     agent._user_id = user_id  # Platform user identifier (gateway sessions)