## Fix Applied ### Problem 1: Cannot expand collapsed section after streaming completes **Root Cause:** The auto-collapse `useEffect` at line 68-77 was triggering repeatedly. When user clicked to expand: 1. `setInternalExpanded(true)` was called 2. But since `!isStreaming && internalExpanded` was true, the effect ran again 3. This immediately collapsed the section again **Fix (ThinkingSection.tsx):** - Added `hasAutoCollapsed` ref to track if we've already auto-collapsed once - Added `prevIsStreaming` ref to detect when streaming starts (to reset the flag) - Auto-collapse now only happens once per streaming session - Manual user expansion is preserved after auto-collapse ### Problem 2: Newlines stripped from thinking content **Root Cause:** The `<div>` wrapping the thinking content used default `whiteSpace: 'normal'` CSS, which collapses consecutive whitespace and newlines. **Fix (ThinkingSection.tsx:149):** - Added `whiteSpace: 'pre-wrap'` to `contentStyle` - Newlines in thinking content now display as visual line breaks ### Tests Added (ThinkingSection.test.tsx): - `allows manual expansion after auto-collapse` - verifies user can expand after auto-collapse - `resets auto-collapse tracking when streaming starts again` - verifies the flag resets for new streaming sessions - `preserves newlines in content with pre-wrap styling` - verifies CSS styling ### Verification: All 27 ThinkingSection tests pass. The `parseThinkingContent` tests also pass (28 tests) - this utility already correctly preserved newlines in thinking content; the issue was purely in CSS display.