Use named window targets (session-{id}, instance-{id}) instead of _blank:
- use-instance-actions.ts: window.open(..., 'session-{id}') for programmatic opens
- session-card.tsx: <a target='session-{id}'> for direct link opens (mobile + desktop)
- workspace-instance-chips.tsx: <a target='instance-{id}'> for chip links
- instance-list.tsx: <a target='instance-{id}'> for instance open links
Browser behavior: if a tab with that target name exists, it navigates/focuses
that tab instead of opening a new one.
Quality gates: tsc --noEmit pass, npm run build pass, 80/80 tests pass
Developer
486f3cbc44