# Story: Collapsible Tool Outputs

## User Story
**As a** User
**I want** tool outputs (like long file contents or search results) to be collapsed by default
**So that** the chat history remains readable and I can focus on the Agent's reasoning.

## Acceptance Criteria
*   [x] Frontend: Render tool outputs inside a `<details>` / `<summary>` component (or custom equivalent).
*   [x] Frontend: Default state should be **Closed/Collapsed**.
*   [x] Frontend: The summary line should show the Tool Name + minimal args (e.g., "▶ read_file(src/main.rs)").
*   [x] Frontend: Clicking the arrow/summary expands to show the full output.

## Out of Scope
*   Complex syntax highlighting for tool outputs (plain text/pre is fine).

## Implementation Plan
1. Create a reusable component for displaying tool outputs with collapsible functionality
2. Update the chat message rendering logic to use this component for tool outputs
3. Ensure the summary line displays tool name and minimal arguments
4. Verify that the component maintains proper styling and readability
5. Test expand/collapse functionality across different tool output types

## Related Functional Specs
*   Functional Spec: Tool Outputs