Adds a "Tools: On/Off" toggle next to the existing markdown toggle in
AgentLogViewer (used by both agent logs and task agent logs). When tool
output is off, tool/tool_result/tool_error entries are filtered before
grouping so only agent text and thinking render. Both toggles persist
globally across sessions via localStorage (fn-agent-log-markdown,
fn-agent-log-tool-output).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>