Wire up branch-from-message handler, add BranchSwitcher glass pill component showing "Branch X of Y" with prev/next navigation. Clean up isDark conditionals in chat components (dark-only app). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Wire up branch-from-message handler, add BranchSwitcher glass pill component showing "Branch X of Y" with prev/next navigation. Clean up isDark conditionals in chat components (dark-only app). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>