v0.18.14 — Inbox conversation tabs

Added

• Added a desktop inbox conversation tab strip above the chat pane.
• Selecting a conversation creates or updates a tab with the contact display name; group conversations use the group display name and participant metadata.
• Tabs use Chrome-like flex sizing so they stay readable with a few conversations and shrink to fit as more conversations are opened.

Reliability and accessibility

• Remembered tabs are capped to the latest eight conversations to avoid unbounded UI growth.
• Clicking a remembered tab triggers a targeted conversation refresh, so older tabs can recover even when the sidebar's current page or filters no longer include that thread.
• Active tabs expose aria-current, close buttons have localized labels, and the tab strip labels are localized across supported app locales.

Verification

• pnpm --filter app exec vitest run components/inbox/conversation-tabs.test.tsx components/inbox-workspace-selection.test.ts --no-file-parallelism --maxWorkers=1
• pnpm --filter app typecheck
• pnpm lint
• pnpm audit:i18n
• pnpm release:hygiene