Feature Request: Option to hide/collapse tool call panel headers in Agent SDK environment

Summary

In the Claude Agent SDK environment, tool call panels (e.g. "Read file.md", "Web search") are always displayed in the UI with no way to suppress or hide them. This creates visual noise during conversations, especially for users who prefer to see only the final output.

Current Behavior

• Every tool invocation (Read, Write, Edit, WebSearch, etc.) shows a panel card in the conversation UI
• /focus command is NOT available in the Agent SDK environment (returns: "isn't available in this environment")
• Ctrl+O only toggles the content inside panels, not the panel headers themselves
• There is no settings.json option to suppress tool call panel display

Expected Behavior

An option (via settings.json, environment variable, or persistent session command) to:

• Hide tool call panel headers entirely, OR
• Collapse them by default so only the assistant's final response is prominently visible

Environment

• Environment: Claude Agent SDK (desktop app / Cowork)
• Platform: Windows 11
• /focus returns: "isn't available in this environment"

Use Case

Users who run Claude for operational/analytical work (not development) find the continuous stream of tool call panels distracting and would prefer a clean, output-focused view - similar to what /focus provides in the CLI, but accessible in the Agent SDK environment as well.

Related Issues

• Feature Request: Compact/Agent Mode - Hide Tool Execution Output #12544
• Feature Request: Output Verbosity Controls for Tool Results and Diffs #21246
• Option to collapse file edit diffs by default #37584