feat(desktop): add live tasks sidebar view

[hashbender]

Summary

• add a new Live tasks entry to the Hermes Desktop left sidebar
• wire a /tasks route into the desktop router and lazy-load the new page
• surface live todo, session, and subagent state in a dedicated dashboard

Testing

• npm run typecheck
• npx eslint src/app/tasks/index.tsx src/app/routes.ts src/app/types.ts src/app/chat/sidebar/index.tsx src/app/desktop-controller.tsx src/i18n/en.ts
• npm run build

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Mirror-of: NousResearch#57004
NousResearch#57004