fc956b9db6
Add display.tool_progress_style setting to control how tool progress messages are displayed in chat platforms: - 'accumulate' (default): Edit a single message with all tool calls (new v0.9.0 behavior) - 'separate': Send each tool call as its own message, interleaved with thinking messages (pre-v0.9 behavior, better readability) The setting participates in the per-platform display override system and can be set globally or per-platform. Files: gateway/display_config.py, gateway/run.py