v0.18.15 — Compact inbox controls

Changed

• Compact the desktop inbox composer action rail so Freeform, Draft with me, and Template are icon-only buttons with accessible labels and tooltips.
• Move Draft with me from the left side of the composer to the right-side action rail.
• Remove the manual Draft reply with GB-Agent composer trigger.
• Remove the workspace-level Stop AI control from the inbox chrome.

Header polish

• Show the selected contact phone number without the subject/phone separator dot.
• Move customer presence / last-seen text inline next to the phone number and hide the extra presence dot in that metadata line.

Verification

• pnpm --filter app exec vitest run components/inbox-compact-pane-source.test.ts components/inbox/gb-agent-draft-with-me-action.test.tsx components/inbox/presence-indicator.test.ts --no-file-parallelism --maxWorkers=1
• pnpm --filter app typecheck
• pnpm lint
• pnpm audit:i18n
• pnpm release:hygiene