fix: expand tool calls by default when Response Style is set to Detailed

[octo-patch]

Fixes #8213

Problem

When Response Styles is set to Detailed in Settings → Chat, tool calls still appear collapsed by default in the desktop GUI. Restarting the app does not change the behavior, even though responseStyle is confirmed as detailed in settings.

Solution

Two changes to ui/desktop/src/components/ToolCallWithResponse.tsx:

1. The outer ToolCallExpandable was using isStartExpanded={isRenderingProgress}, which only expands when progress is actively rendering. Changed to isStartExpanded={isRenderingProgress || isExpandToolDetails} so tool calls start expanded when responseStyle === 'detailed'.

2. ToolResultView was always rendered with isStartExpanded={false} regardless of response style. Changed to isStartExpanded={isExpandToolDetails} so tool output is also expanded in Detailed mode.

The isExpandToolDetails variable was already correctly computing true for 'detailed' style and false for 'concise' — it just wasn't being used for the outer expandable and tool result views.

Testing

• Set Response Styles to Detailed in Settings → Chat
• Send a message that triggers tool calls
• Tool calls and their results should now start expanded
• Switch to Concise — tool calls should start collapsed

[DOsinga]

Clean, minimal fix — correctly wires the existing isExpandToolDetails variable into the two places that were ignoring it. LGTM.

One thing before this can merge: the DCO check is failing. Please amend your commit to include a Signed-off-by line, e.g.:

git commit --amend --signoff
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