Template pages were toggleable but indistinguishable in the sidebar tree.
Render an IconTemplate next to the title when node.isTemplate is true, wrapped
in a Tooltip(label='Template') with an aria-label + role='img' for AT. The
icon is a child of the row Link so clicks navigate as normal; pointer events
stay enabled so the tooltip's hover handlers fire. Adds the 'Template' i18n
key to en-US and ru-RU (other locales fall back to en-US).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
859223db1a
