Open session tabs can outlive the title value they were created with, while the sidebar and session detail view read from the refreshed session list. Refresh existing tab titles when a session tab is reopened and after session list refreshes so the top tab bar cannot keep a stale generated title.
Constraint: Sidebar filtering and session refresh should not leave already-open tabs with stale labels.
Rejected: Only rely on WebSocket title update events | restored tabs and already-open tabs can miss later session-list corrections.
Confidence: high
Scope-risk: narrow
Directive: Keep session tab titles derived from current session list data when available.
Tested: cd desktop && bun run test -- --run src/stores/tabStore.test.ts src/stores/sessionStore.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run test -- --run
Tested: agent-browser smoke on http://127.0.0.1:1420/ confirmed top tabs match sidebar and session detail titles.
